2005 Toyota Prius Logo
Jonathan Aungst Posted on Oct 18, 2012
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How do I turn off master warning light on 2005 toyota prius

Master warning light and check engine light are on. How can I clear these?

1 Answer

Ricky Peters

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  • Toyota Master 2,620 Answers
  • Posted on Oct 18, 2012
Ricky Peters
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You need a scan tool or a code reader to do it but,if the problem still exists then the lights will come back on.You need to retreive the troubles codes from the computer to see what area of the engine that problem exists and go from there.

5 Related Answers

Lovebytes

Dave Richardson

  • 10 Answers
  • Posted on Aug 21, 2008

SOURCE: 2001 Toyota Prius - A warning light with exclamation mark on a car appeared on the MultiVisual Display Unit

I had the same problem. I unplugged the relays from the fuse/relay box under the bonnet. (Top left side) and replaced them. The problem disappeared. (2001 Prius 109,000 miles)

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Lovebytes

Dave Richardson

  • 10 Answers
  • Posted on Aug 21, 2008

SOURCE: Toyota Prius 2001 Warning Light With Exclamation Mark on a car.

I had the same problem. I removed the relays from the fusebox under the bonnet/hood (top left side) and then replaced them. All working OK now. Sometimes I have had a problem when I start the car (especially after rainy day) the petrol engine immediately dies and I can only drive in electric. I have found that if I turn the ignition off and then restart it and immediately pump the accelerator it makes the engine run OK. Hope this helps.

s60six

  • 328 Answers
  • Posted on Dec 15, 2008

SOURCE: toyota 2001 prius hybrid- warning signs

your owners manual should show all of the symbols and what they mean.I tried to get one to look at it but no luck...they should be in the manual though

Anonymous

  • 42 Answers
  • Posted on Dec 23, 2008

SOURCE: 2005 toyota tacoma check engine light

pull the E.F.I. fuse located under the hood on the drivers side, if there is more than 1 efi fuse pull them both along with the E.T.C.S. fuse (if there is one) for 1 minute or so. That should do it

Anonymous

  • 412 Answers
  • Posted on Nov 14, 2009

SOURCE: replacing a Ac Heater Blower Motor in a 2005

if youre sure that its the blower motor.......then HANG ON......cuz HERE WE GO!!!! k....open the passenger front door....get on your knees.....and look BELOOOWW the glovebox...there should be a black plastic cover...more than likely...that ya have to remove....after that....you can see your blower motor...should have three screws...maybe one more....and it will be released from the evap box....you then have an electrical pigtail connector you have to release and VIOLA!!!!!! there's your blower motor in your hands......install is opposite of reverse.....yeah I know that your knees hurt right now.....but...HOPE I HELPED!!!!!

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ABS ON,BRAKE RED L ON ALARM ON HARD PEDAL HOW CAN I FIND THE PROBLEM

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Exclamation light on

It means Master Warning Light. It illuminates when there is any malfunction in the engine and/or the hybrid system of the vehicle. When the master warning light illuminates, it become necessary to get the car be scanned thoroughly for malfunctions.
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Prius 2005 triangle indication

The Triangle indication:
Description: MASTER WARNING LIGHT.
The battery ECU has a self-diagnosis system. If the computer, High Voltage (HV) battery system or the components are not working properly, the ECU carries out a diagnosis to detect the malfunction, and illuminates the master warning light in the combination meter together with the HV system warning indicator on the multi information display.
NOTE:
The master warning light illuminates when the HV battery system fails and it blinks when in inspection mode.
1helpful
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2007 prius master warning light, (!), VSC and engine light on

The problem may be the check engine light only, whenever it turns on the master warning light may also turn on, if there is an autozone or similar autoparts place close by you can go there and they can diagnose the check engine light using their scantool, then you can reply here to me with the code numbers and I can help, the code numbers are important so please write them down.
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Master warning light on my 2002 toyota prius

Not much you can do yourself without having diagnostic code information, you'll have to either go to a Toyota dealer or to a shop that has a diagnostic tool that can read code information from the engine computer as well as the hybrid system computers.
2helpful
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What does the master warning light mean? (triangel with ! and the three lights points to the car).

This light shows operational status of traction control system. If it is constantly lit when engine is running, this means that traction control system is off. If the light flashes during driving, it means the loss of traction at the wheels, and traction control system is operating- decreasing engine torque to stop exessive wheelspin.
Good luck.
1helpful
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My check engine light came on a week ago with the master warning light. The master warning light went off but the check engine light never did and has been on while I'm driving the whole time(I do...

Either take it to a autoparts store and they will turn it off or disconnect the battery for five minutes and the computer will reset. If it comes back on your local auto parts representative can harmlessly run a code check on it to see what the problem is.
2helpful
1answer

Engine light for hybrid system came on

Seems to be alot of this problem mentioned on this forum regarding prius warning lights.
Don't worry yet might just be a service reminder.
Google " 2005 prius warning light " the first page will show a link to toyotapartsandservice.com where you can find the owners manual that covers all the warning lights.
0helpful
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Check engine light comes on or more specific a car flashing red with a exclamation mark in the middle of it. will start then quit within 5 or 10 seconds its a 2002 toyota prius, battery seems fine

Acording the online manual , that is the Hybrid system warning light. I havn't tracked down exactly what it means , but is is grouped in with other service reminders. Will add more info when i find it " Google 2005 prius warning light " one of the first listings has a link to toyotapartsandservice.com
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