2007 prius warning lights

Washington. Vehicle: 2010 Prius. Model: II. Driving over a rough stretch of road yesterday, all three of these lights suddenly came on, the brakes became spongy, and regenerative braking stopped. Car is a 2010 Prius with 162k miles. Two things to note: 1.) I replaced the rear wheel bearings (myself) a couple of weeks ago and have since driven ...

Apr 1, 2017 · I have a 2007 Prius. I get an occasional dead battery and need to jump the car, after the most recent time, I drove the car around for ~20 minutes and when parked, turned the car off but several of the dashboard lights kept blinking, even after removing the key. The Drive/ Park/ Reverse/ Neutral etc... lights all flashed and the gas gauge also ... Oct 15, 2008 · The Prius is 2004 with 120,000 miles on it. It happened again today driving TO work, on surface streets about 4 miles from home and 2 miles before getting on the freeway. Going DOWN a downgrade about 50 miles per hour with foot on neither brake nor accelerator. Master Warning Light flashed on briefly with no message on the MFD, no other warning ... Model: ----USA----. I have a 2007 prius that I purchased in 2015 with 25,000 miles and which now has 50,000. About a week ago as I was driving, the brake light and ABS light went on, and a couple seconds later the (!) light flashed while emitting a high pitched sound. I had to press a lot harder on the brakes in order for them to work.Location: boston. Vehicle: 2012 Prius Plug-in. Model: Plug-in Base. sounds like your battery is bad again. perhaps the auto zone scanner isn't picking up the codes. i have not heard of the cooling fan being triggered by the dash lights, it likely is the battery overheating. #2 bisco, Sep 26, 2016.5. Today unplugged yellow cable underneath both seats and plugged back in. Still airbag light on. Going to try to unplug and plug all connectors underneath and maybe clean connector to see if that will do. Left side passenger airbag ind (dashboard corner)is red. Along with airbag light. left side passenger is driver.Apr 7, 2013 · Posted on Mar 23, 2009. SOURCE: I recieved the following Warning lights: VSC and Engine Check. You have an issue with the engine. The other lights come on when the Check Engine light comes on. The most common reason for the Ck Engine light on is a loose gas cap. If the cap is tight, you will need to find someone who can scan the car's ECU and ... Most likely the inverter pump had failed. I had a friend that had this happen. All lights went off after a little while (I guess when the car cooled). Yes, it was the pump. Appears to happen to a lot of people with an older Prius. #3 Axekicker, Jul 22, 2016.

This is a step by step Diagnosis and how to reset the ABS VSC Break warning lights in 2004 to 2009 Toyota Prius.If you get the error codes C1203 and C1345, p...Jul 29, 2011 · Model: N/A. So, I got the dreaded check engine, (!), red triangle, VSC light etc lights up on the dashboard yesterday. If I disconnect the 12V battery for 30 seconds and reconnect, the lights go away and after about 10 mins of driving they, are back ON. I tried to charge the battery with smartcharger (Schumacher SSC-1000A) at 2Amp but within 5 ... Dec 3, 2018 ... 6:30 · Go to channel · Toyota Hybrid Prius Check Engine Light Alarm Warning Battery thebusfor.us. The Koch Family•90K views · 10:40 · Go...The first thing you should do is try to reset the light. To do this, turn off the engine and then press and hold the power button for at least 5 seconds. If the light does not reset, then there may be a more serious problem and you should take the car to a mechanic. If you see the Prius hybrid system warning light on your car’s dash, don’t ...Model: Plug-in Base. it's just the charger voltage vs the car reading.if it's 12.8, that's fine. if it's 12.3 or below, no good. if it's in between, it should work, but a new battery should read close to 13v. there could be something draining it, or your daughter ay have left a light on again.Jul 29, 2011 · Model: N/A. So, I got the dreaded check engine, (!), red triangle, VSC light etc lights up on the dashboard yesterday. If I disconnect the 12V battery for 30 seconds and reconnect, the lights go away and after about 10 mins of driving they, are back ON. I tried to charge the battery with smartcharger (Schumacher SSC-1000A) at 2Amp but within 5 ... Not everyone can afford to install solar panels or get a new Prius this Earth Day, but there is one place you can go green without spending an arm and a leg or radically changing y...Repeat this procedure about 5-7 times. The key here is to get the timing right. Afterwards, go ahead and start the car’s engine. Check if the SRS light has gone out. If the indicator light isn’t responding, try the following number of seconds: Turn the key on, wait 7 seconds, then turn it off and wait 3 seconds.

My Prius is a 2007. I checked the battery, it's fine. The pump that is often the culprit is fine (ripples/movement in the fluid). ... Also, next time the warning lights come on, take sharp photos of the warning lights and any warning icons on the MFD, and post if you would like to promote further discussion. Thanks. #8 Patrick Wong, May 20, 2014.Feb 20, 2007 · If the master warning triangle and the hybrid vehicle warning icon are the only items that appear, then really, any number of hybrid system issues might be causing the problem, including: 1) transaxle failure. 2) inverter failure. 3) traction battery failure. 2007 Prius Model: Touring. I just returned home from the mechanic after getting my 12V battery replaced because it had completely died. The car was running great, no issues and no warning lights. I filled up on gas after 8 minutes of driving and when I tried to turn the car back on, the dashboard would not light up. In addition, the check ...Model: II. Momotaro, I have exactly the same dashboard light signature with my 2008 Prius that just popped up. In the middle of a drive, got 4 warning lights simultaneously, 1) BRAKE (typically goes on when emergency brake engaged), 2) Brake warning light that looks like a tire with an exclamation point, 3) ABS, 4) VSC.Apr 21, 2022 · The most emergency warnings in Toyota Prius dashboard symbols are appeared in red. In this case, you should stop your vehicle as soon as possible by pulling it to the side so as will not to create a danger to traffic. According to malfunction lights, you should take an action.

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Vs. 100% BRAND New OEM Toyota HV Battery for $2070, 1 year warranty when not installed by Toyota. 3yr warranty when installed by Toyota, but you will have to pay for that. Many people are short sighted and buy a used HV Battery b/c cheaper upfront, and they like the warranty duration.2013 Prius. Model: III. This just started happening with my Prius when I first push the start button. All the warning lights come on as normal, then all of the sudden everything goes black to include the display, interior lights, and exterior lights. The Malfunction Indicator Lamp dimly starts to blink with sometimes in unison with a click …Common Reasons For Prius Brake Light On. Here are some common reasons why the brake light on your Prius may be on: 1. Low Brake Fluid Level. If your brake fluid level is low, it can cause the brake warning light to come on. This can be due to a leak in the brake system, worn brake pads, or a faulty master cylinder. 2.Jan 30, 2024 · Updated on Jan 30, 2024. Table of Contents. The “Check Hybrid System” warning light on a Toyota Prius could indicate it’s time for a hybrid battery pack replacement—but it could also be triggered by something as simple as overfilling your engine oil. Hybrid battery replacement is one of the most expensive parts of hybrid ownership. > Gen 2 (2004-2009) Toyota Prius Forums > Gen 2 Prius Care, Maintenance and ... Feb 20, 2007 83 3 0 Location: Virginia Vehicle: 2004 Prius Model: N/A. My wife just called and said this light came on. ... slower in accelerating. The car's mpg has declined from 40+ to 33ish. Today, I started my car to go to lunch and these warning lights came on ...Location: Illinois. Vehicle: 2014 Prius v wagon. Model: Five. On my way home yesterday on the Interstate driving normal speed (65-70) and thought I seen something flash - I looked again and the thermometer/temp guage warning light was flashing. It flashed 3 or 4 times then went out. It happened again so I pulled off the next exit.

Jul 29, 2011 · Model: N/A. So, I got the dreaded check engine, (!), red triangle, VSC light etc lights up on the dashboard yesterday. If I disconnect the 12V battery for 30 seconds and reconnect, the lights go away and after about 10 mins of driving they, are back ON. I tried to charge the battery with smartcharger (Schumacher SSC-1000A) at 2Amp but within 5 ... If you can, connect the voltmeter to either the battery in the rear cargo area or the jump terminal in the engine fuse box. With the car in ACC mode, foot off of brake and one press of Power button, take a volt reading. Then turn on headlights and take another reading. If less than 12.0 V then you need a new battery.The short answer: The blinking key comes on 30 seconds after the car is turned off and drivers door is opened, and all of the doors/hood are locked. It indicates the theft deterrent system is set. Just a guess, the cellphone may have set off the SKS light. There is a warning about pacemakers and radio signals, etc.Vehicle: 2004 Prius. Model: II. Hello, I was driving last night and my car Triangle Warning Light and Check Engine Light Went on along with on the nav screen a car with a ! mark in it came on. On The info screen the battery level was changing fast from fully charged to just about empty. The car lost almost all power going about 42 miles an …Hi guys, My 2006 prius started beeping and showing multiple warning lights - The big triangle with the exlamation, Brake System Warning light and Check Engine light on the dashboard. On the main screen the hybrid system warning icon popped up. I asked from a toyota service place and they said this might be due to multiple …Directly below are the common causes for the Toyota Prius battery warning light. The potential fixes are presented in a good way to check your car. 1. Check The Serpentine Belt. Before testing your Prius’s battery, examine the basic things. The serpentine belt that turns the alternator is top of the list.When it comes to health, it’s surprising how the little things we pass off as “harmless” can actually lead to the most severe and sometimes life-threatening results. Here, we tackl...Vehicle: 2007 Prius. Model: N/A. This is the classic failed combination meter (CM) scenario. The installation of your new 12 V battery is now driving the CM electronics at the proper full voltage and has tipped the failing capacitors over the edge. The pinned thread a the top of the Gen 2 Prius Care, Maintenance and Troubleshooting forum ...Expert thieves have a lot of tricks up their sleeves to rob hapless travelers and natives. If you want to be less of a target for pickpockets, Gene Turner, "America's friendliest p...Jan 5, 2022 ... ... you get the error codes C1203 and C1345, please watch the video to the end. 2004 2005 2006 2007 2008 2009 Toyota Prius Gen 2 Gen II ABS problem.

My Prius is a 2007. I checked the battery, it's fine. The pump that is often the culprit is fine (ripples/movement in the fluid). ... Also, next time the warning lights come on, take sharp photos of the warning lights and any warning icons on the MFD, and post if you would like to promote further discussion. Thanks. #8 Patrick Wong, May 20, 2014.

Oct 19, 2021 ... How To Fix Security Light Stay On || Communication Circuit how fix the problem warning p0352 code. Auto mechanics & advisors.•253 views · 15:33.Dec 3, 2018 ... 6:30 · Go to channel · Toyota Hybrid Prius Check Engine Light Alarm Warning Battery thebusfor.us. The Koch Family•90K views · 10:40 · Go...High Coolant Temperature Warning Light On Gen2 Prius eBay Disclosure: As the club is an eBay Partner, the club may earn commision if you make a purchase via the clubs eBay links. DISCLAIMER: Toyotaownersclub.com is an independent Toyota forum for owners of Toyota vehicles. The club is not part of Toyota UK nor affiliated with or …Dec 3, 2018 ... 6:30 · Go to channel · Toyota Hybrid Prius Check Engine Light Alarm Warning Battery thebusfor.us. The Koch Family•90K views · 10:40 · Go...To check if it's the battery, insert your key, press power without your foot on the brake. When the display comes on, hold down the display button and turn your lights on and off 3 times. A diagnostic screen pops up. Press Menu, then Display, then System Signal (or the one closest sounding).These lights mean that your VSC system is off, indicating a mechanical or electrical problem. If you drive a newer Prius, you might even have a “Check VSC system” light—and you should do as it says! Diagnosing a problem with the VSC system can be difficult, since it’s closely connected to the ABS system and the engine.Dec 14, 2016 ... all these lights went on at the same time when I was changing a fuse.

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I already had to fix the instrument cluster, the 12v battery, and change the oil, and there’s still some stuff that needs to be done with it. Anyway, I was just driving this morning, minding my own business, when all of a sudden, I get a literal Christmas tree of warning lights. I got a VSC light, a yellow, circled, exclamation point (brake ...Conclusion. Your VSC light staying on means that the Toyota Prius’s VSC system has been deactivated. It is not as safe to drive without it on, but it should still drive fine. Good luck determining what is causing the problem. Remember, a good code scanner can save a ton of time. The VSC (Vehicle Stability Control) system is a traction ...Does hybrid car production waste offset hybrid benefits? Find out if hybrid car production waste offsets hybrid benefits in this article. Advertisement The hybrid car has been tout...Press the brake pedal 8 times or more in 5 seconds after turning the car into ready mode. Turn off the car and remove jumper. The ABS light will not be on. This procedure only resets the light, not the underlying problem. If the original fault is not repaired the light will come on again. Common Reasons For Prius Brake Light On. Here are some common reasons why the brake light on your Prius may be on: 1. Low Brake Fluid Level. If your brake fluid level is low, it can cause the brake warning light to come on. This can be due to a leak in the brake system, worn brake pads, or a faulty master cylinder. 2. 7 posts · Joined 2007. #1 · Sep 5, 2007. Hi, I Got the red triangle with ! and all warning lights lit up like Christmas lights while hitting 55 on the hwy. Before I could find a place to safely park, rapidly it lost power and it come to a halt. Also I got the "Add Fuel" warning message on the screen while attempting to restart it.Most likely the inverter pump had failed. I had a friend that had this happen. All lights went off after a little while (I guess when the car cooled). Yes, it was the pump. Appears to happen to a lot of people with an older Prius. #3 Axekicker, Jul 22, 2016.Vehicle: 2007 Prius. SKID ECU reset per pins 4 & 13, Ready mode, press brakes 8 Xs in 5 seconds cleared the !, ABS, VSC lights for about 3 seconds; the "BRAKE" light remained lit. Also attempted this in IG-ON mode. Checked ABS wires to brakes and all appear and feel ok. Flashing lights are in series: ! = 6, 6, 9, 5.Once in awhile, probably 5-10 times a year and often close together, the Master warning and malfunction lights will come on. The sequence will be: while driving, the car will suddenly have a small hiccup (feels like there’s a problem with the cooperation between the gas and electric engines taking over from each other (sorry, I’m really bad ...12v was replaced by Toyota w/ new last fall as mentioned above. Service signal check showed me 12.6v last night w/ 12.2v at display after second power button press and 14.1 after putting car into ready state; left interior light on for an hour this AM and retested and got .1v lower results afterwards for starting voltage but was back up after … ….

On my 2007 Prius this happened. All warning lights on Mechanic said I was out of gas but I got no warning lights #15 Tom Montefusco, Oct 19, 2023. bisco cookie crumbler. Joined: May 11, 2005 107,951 49,072 0 Location: boston Vehicle: 2012 Prius Plug-in Model: Plug-in Base.Any time those lights come on, your brake computer has Diagnostic Trouble Codes that can be read out, giving information on the condition of your brake system. ... 2007 Prius Model: Two. Good one chap. Maybe the tsb abs replacement addresses those issues. #15 edthefox5, Jun 11, 2017. JC91006 Senior Member. Joined: Nov 10, 2013 …Your VSC light staying on means that the Toyota Prius’s VSC system has been deactivated. It is not as safe to drive without it on, but it should still drive fine. Good luck determining what is causing the problem. Remember, a good code scanner can save a ton of time. The VSC (Vehicle Stability Control) system is a traction/stability control ...Hybrid car pictures of the Toyota Prius, Ford Escape, Tesla Roadster, and Aptera. Check out this image gallery of Hybrid cars. Advertisement One of the most recognized Hybrids on t... See Manual. Common Toyota Warning Lights. Explore warning lights and indicators found on most Toyota vehicles. See Less. SAFETY SYSTEM WARNING. Questions or concerns? Consult your Owner’s Manual or schedule a service with a nearby dealership. View Manuals Schedule Service. Welcome to the Toyota Family. Sign In. 2007 Prius - Battery not charging, no acceleration, Red triangle and other warning lights. Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Rovinpiper, Sep 6, 2016.Dec 11, 2013 ... See the full guide in more detail here http://www.diagnostic-world.com/pages/toyota_prius_mk1_xw10_dash_warning_lights_226352.cfm.Your VSC light staying on means that the Toyota Prius’s VSC system has been deactivated. It is not as safe to drive without it on, but it should still drive fine. Good luck determining what is causing the problem. Remember, a good code scanner can save a ton of time. The VSC (Vehicle Stability Control) system is a traction/stability control ...Dec 10, 2022 · Prius warning lights come in a variety of colors. Here is a quick guide to what each color means: Red: A red warning light means that there is an immediate and potentially dangerous problem with your car. If you see a red light, stop the car as soon as it is safe to do so and call for assistance. Orange or Yellow: An orange or yellow warning ... Disconnect the battery for 30 seconds, then reconnect it. This will often reset the system and turn off the warning light. Check the vehicle’s fluid levels and top them off if necessary. A low liquid level can trigger the master warning light. Inspect the vehicle for any loose wires or other potential electrical problems. 2007 prius warning lights, I have a 2007 Prius. I get an occasional dead battery and need to jump the car, after the most recent time, I drove the car around for ~20 minutes and when parked, turned the car off but several of the dashboard lights kept blinking, even after removing the key. The Drive/ Park/ Reverse/ Neutral etc... lights all flashed and the gas gauge also ..., Washington. Vehicle: 2010 Prius. Model: II. Driving over a rough stretch of road yesterday, all three of these lights suddenly came on, the brakes became spongy, and regenerative braking stopped. Car is a 2010 Prius with 162k miles. Two things to note: 1.) I replaced the rear wheel bearings (myself) a couple of weeks ago and have since driven ..., Jul 29, 2011 · ABS, VSC and check engine lights are ON (second image) I shut down and re-started and am back to Brake, Brake warning (!) ABS and VSC lights. Before starting the engine, the diagnositc check showed battery at 11.9V and after starting the engine, it showed 14.3V. Still researching this forum but figured i'd post in the meantime. , Vehicle: 2004 Prius. Model: II. Hello, I was driving last night and my car Triangle Warning Light and Check Engine Light Went on along with on the nav screen a car with a ! mark in it came on. On The info screen the battery level was changing fast from fully charged to just about empty. The car lost almost all power going about 42 miles an …, Model: Plug-in Base. the lights only tell you that there is a problem. you need to read the trouble codes with toyota techstream. that will tell you the problem areas, and the service manual has a trouble shooting tree to follow. #3 bisco, Dec 26, 2021. damonnoisette likes this., Have you ever experienced the frustration of seeing your engine light warning persistently illuminated on your dashboard? It’s a common occurrence that can leave many drivers feeli..., Model: Plug-in Base. it's just the charger voltage vs the car reading.if it's 12.8, that's fine. if it's 12.3 or below, no good. if it's in between, it should work, but a new battery should read close to 13v. there could be something draining it, or your daughter ay have left a light on again., 2007 prius almost all warning lights are on. Discussion in 'Gen 2 Prius Technical Discussion' started by m14s29e, Nov 28, 2020. Tags: prius; ... Warning lights are not really useful, because all they tell you is the ECU that the light relates to has some diagnostic infromation to tell you. Therefore it is not a lot of use titling a thread with ..., I just bought my 2007 Prius 3 weeks ago. I have 250 miles on it. This morning I started it but I had 4 warning lights go on!! Yikes!! I had the Master warning light, VSC, brake system and the malfunction indicator lights all go on. I turned the car off and called the dealer., Step 1 – Plug a matching adapter into Prius Car. An adapter is designed to read the information from the Prius check hybrid system effectively instead of only reading in the traditional method. The OBD2 adapter is suggested to use in this process and helps people forecast possible problems with the battery. Please plug the OBD2 in the port ..., First, the red triangle Warning light will come on, followed by "PROBLEM" on the display followed by a red temperature indicator. Typically it flickers off after just a few seconds, but sometimes the temp light stays on for longer, maybe 30 seconds or a minute before it shuts off. Then it continues to go on and off every few minutes for as long ..., 2007 prius. Ive had the same issue for about a year red triangle only. The red triangle comes on after 3k miles or so in between oil changes. it clears everytime i replace the oil. I drive about 500-600 miles per week. currently at 199k. i asked two service managers, had the same problem with a few other prius they service in town. couldnt ..., If the "Check Hybrid System" indicator light is showing on your dash, it could mean your Prius is having engine problems or …, 5 posts · Joined 2014. #1 · Jul 13, 2014. I have a 2005 Prius with 109,000 miles and the traction battery failed. All the warning lights are on ( Triangle, ABS, Brake, etc.). The car would no longer start and run ( only go from P to N ) and they could not be reset with a basic code scanner. Previous codes were POa80 and P3013., Dec 2, 2019 · Directly below are the common causes for the Toyota Prius battery warning light. The potential fixes are presented in a good way to check your car. 1. Check The Serpentine Belt. Before testing your Prius’s battery, examine the basic things. The serpentine belt that turns the alternator is top of the list. , 2009 Prius. Model: One. Here's a way to test the battery using the self test: - Without brake pedal, press the Power button once and release to enter ACC mode. - Press and hold the MFD Info button, then turn the headlights on and off three times to enter Maintenance mode; release Info button. - Press “Menu” (on screen), All 4 warning lights came on yesterday when started car 2007 Prius with 125K miles. Brakes working but grabbing with added pedal pressure. Need help on how …, A week ago my dash lights - speed, etc.wouldn't come on when I started my 2007 prius, only engine, blinkers and, warning lights came on when they were meant to. everything else was operating as it should: both engines, can drive, put in park etc., Once in awhile, probably 5-10 times a year and often close together, the Master warning and malfunction lights will come on. The sequence will be: while driving, the car will suddenly have a small hiccup (feels like there’s a problem with the cooperation between the gas and electric engines taking over from each other (sorry, I’m really bad ..., This is a step by step Diagnosis and how to reset the ABS VSC Break warning lights in 2004 to 2009 Toyota Prius.If you get the error codes C1203 and C1345, p..., 3 posts · Joined 2023. #4 · Mar 30, 2023. Brake, ABS,VSC, (!) warning lights. 2014 Prius V with 200000 miles on it changed the brakes and had the mentioned lights come on. Resseted with techstream and a few drive later lights would come on. The brake pedal would bottom out and had to pump it to stop the car., Oct 21, 2010 · First, the red triangle Warning light will come on, followed by "PROBLEM" on the display followed by a red temperature indicator. Typically it flickers off after just a few seconds, but sometimes the temp light stays on for longer, maybe 30 seconds or a minute before it shuts off. Then it continues to go on and off every few minutes for as long ... , A week ago my dash lights - speed, etc.wouldn't come on when I started my 2007 prius, only engine, blinkers and, warning lights came on when they were meant to. everything else was operating as it should: both engines, can drive, put in park etc., The key warning light on the dash comes on and stays on for some time. The light with the key picture and an exclamation mark through it. Anybody else have this happen. There is no beeping warning like you get if you drive away with the key out of the car. ... 2007 Prius. Originally posted by tmorrowus@Mar 13 2006, ..., 7 posts · Joined 2007. #1 · Sep 5, 2007. Hi, I Got the red triangle with ! and all warning lights lit up like Christmas lights while hitting 55 on the hwy. Before I could find a place to safely park, rapidly it lost power and it come to a halt. Also I got the "Add Fuel" warning message on the screen while attempting to restart it., Dec 25, 2022 · 2007 Toyota Prius Low Fuel Warning Light. The Toyota Prius Low Fuel Warning light may indicate that the car is running out of fuel. If you are low on fuel, you should stop driving as soon as possible and fill up your tank. The warning light may also stay on if the car has a mechanical issue that prevents it from switching to a different fuel ... , Drove it back home. The car is mechanically operating normally, but the red triangle stays on after turning the car off and back on, as does the check engine light. The tire light has been an ongoing thing that I don’t think is related. The VCS and other exclamation mark will go away after turning off the car, but came back on half way home., Jul 18, 2016 · Most likely the inverter pump had failed. I had a friend that had this happen. All lights went off after a little while (I guess when the car cooled). Yes, it was the pump. Appears to happen to a lot of people with an older Prius. #3 Axekicker, Jul 22, 2016. , Does hybrid car production waste offset hybrid benefits? Find out if hybrid car production waste offsets hybrid benefits in this article. Advertisement The hybrid car has been tout..., Sep 2, 2007. 3. 0. 0. My new 2007 Prius just started showing me the above warning light. The manual tells me squat about it other than what it is - not what it means or what to do. The hybrid battery was low but the fob was in my pocket as usual. After a few minutes of driving, the light went out. Was this a function of the low hybrid battery ..., Tire Pressure Warning Light. It indicates that the pressure in one or more of your tires is too low or too high and needs to be addressed. Driving on low- or high-pressure tires is unsafe and can cause additional damage to your vehicle. Usually, tire pressure should be between 30 and 35 psi, Also known as the TPMS symbol., 1. Press hard on the brake pedal while pressing the POWER button, when making the Prius READY. 2. If the 12V battery is more than four years old, replace it as a preventive move and make sure the new battery is fully-charged prior to installation. #3 Patrick Wong, Nov 26, 2013., See also: 2007 Toyota Prius Warning Lights Guide. How to Fix a Faulty Red Triangle Warning Light. How to Fix a Faulty Red Triangle Warning Light. If your Toyota Prius red triangle warning light is flashing, it indicates that there is a problem with the vehicle’s hybrid system. The first thing you should do is pull over to the side of the …