Inverter temp valve

If the inverter is overheated, that should not cause the "check engine" light to come on. Instead, the hybrid vehicle icon in the MFD, and the ABS/VSC warning lights will appear as the inverter overheats and the DC/DC converter shuts down. Further, I'm not aware of a valve regulating inverter coolant flow.

Typically, when the check engine light appears, there is a problem with the engine. There is a valve that regulates engine coolant flow between the cabin heater core and the coolant heat recovery system canister. That valve is known to fail from time to time. Perhaps that is the problem with your car.

We might have more to comment if you can obtain the DTC logged by your car.

 

I just had my HV cooling system pump valve changed on 6/8/10. And the coolant was changed , and a diagnostic report on all systems. The price was $360.47.
My master waring light came on and the check engine light.

My Auxillary Battery went bad a few week ago and the same lights came on plus acouple of others the VSC and I don't remember the other. There is a test you can do to check your Aux battery.

 

The 'check engine light' activated on my '05 Prius. It had 118K miles when this happened last week. Toyota service diagnosed it and said it was the 'control flow valve for the inverter,' looks like P/N 33 CPR6 4.00. The repair included this as well as P/N 16670-21010 Valve Assy; and P/N 00272-SLLC2 Super Long Life Cool. They said if I was to drive the car without repairing it, I would damage the engine. Is this exactly what you had? Or has anhyone else had this problem also? I never had any problems with the cas prior to this. The cabin air filter and the engine air filter were also replaced. I need some help on this.
Thank you.

 

Also, the Toyota mechanic who serviced my car said my car's problem is v ery rare. in fact only one other Prius had the same problem as mine.

 

This is the same problem as discusssed earlier in this string: the failed valve switches engine coolant between the cabin heater core and the coolant heat recovery canister. The implication of the failure is that 1) your cabin heater might be impaired and 2) the engine may emit more emissions upon warmup. Engine damage would not be an issue.

The valve has nothing to do with the inverter and has a misleading name.

 

Thank you very much Patrick. You have been extremely helpful, and I certainly appreciate it!