Master Warning Light On

[sockmonkey]

I am having problems with my 2006 prius.... I was driving and all of the sudden the Master Warning light came on along with the Brake System warning light and the check engine light. I left my car and came back in 2.5 hours and turned the car on and this time the Master warning light and the check engine light came on... I am wondering if this is a malfunction just because it seems when I turn my car on the indicator lights change as to what is wrong with it. Has anyone experienced this problem? I am waiting to take it to the dealership tomorrow... If it helps my car has about 55,000 miles on it.

[Patrick Wong]

This sounds like a malfunction, makes good sense to visit your dealer. I'm wondering whether your inverter coolant pump has failed?

[sockmonkey]

I got up this morning and used the CarMD diagnostic. Unfortunately he wasnt able to give me a solution to the code that read P0800, he said it had something to do with the emmisions valve. Although when I look up the diagnostic codes for Toyotas it tells me something completely diffrnet. We told the Service guy at Toyota the read out we got and he said that its unlikely that it would be an emmisions problem with the valve on the engine.
Not sure as to what is wrong with my car all I know is this morning I got in started it up and well now the master warning light is on the check engine light and now the tire pressure light is on ... the lights are not consistent and seem to change. Anyways with what little info I have now... if you can offer some help I will be appreciative..... and keep you updated as to what they diagnose my car with and get the codes. Thanks!

[Patrick Wong]

DTC P0800 is not a valid Toyota Prius DTC.

Yes, I'm interested to know the diagnosis and outcome.

[sockmonkey]

I just picked my car up and wel here are the things I found out from this experience:
CarMD was not able to give me a proper diagnostic read out on my car. Even the customer support called me back to tell me they were baffled at the code I was given.... so although I have read some people say that it has worked on their cars it did not work on my Hypid 2006 Prius.

The code I retrieved from the dealership was P0125, looking at my Diagnostic report sheet it is in the Engine and ECT column. The service guy told me that it was a computer malfuntion and that my software needed to be updated. They were a bit puzzled as to why I received that code he said something about the engine and the power button, which I had power cyled my car a few times and found my car to start just fine and not have any problems. I do beleive with the diffrent various indicator lights comming on and off that it was a malfunction with the software and I am releived that it didnt cost us anything. I hope this helps..... thanks so much guys for your help and putting up with a girl who knows little about cars. Have a great Thanksgiving!

[Patrick Wong]

Thanks for providing your update.

DTC P0125: Insufficient Coolant Temperature for Closed Loop Fuel Control

This fault will normally occur if the engine temperature does not increase as expected once time has elapsed. Trouble areas include the cooling system, the engine temperature sensor, or the thermostat.

I'm not aware that this error can be corrected by a firmware update. I'm wondering if you would mind scanning your repair invoice and posting it here (feel free to remove personal identifying info) so we can see the comments written by the service advisor.

[sockmonkey]

I dont havve access to a scanner so sorry.

[forrest_fire1]

master warning, ABS, VSC and check engine lights all came on last night as we were driving over the mountain. All at once!!! Very scarry...

After reading posts here we have decided to continue on our trip and stop at the next toyota dealer on our way. We have over 100 miles until our next toyota dealer...

Please let me know if anyone has had this experience before. We will check our email every chance we get @ wi-fi hot spots along our way.

Thanks,
Forrest