Skip the auto shop - Our mechanics make house calls

Q: Code P0128

asked by on

The Check Engine Light came on, and I had a diagnostic, which showed code P0128, which has to do with thermostat.

A: The code has to do with the thermostat not ...

The code has to do with the thermostat not performing as specified, or the temperature sensor is not working correctly. You could first replace the thermostat, since it is the most common cause, and see if the code returns. If it returns, then replace the sensor. Or replace both components and be done with it. I recommend having a mechanic help you with the thermostat replacement, and/or temperature sensor replacement.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: The car has an autocheck report of 90.

Hey there. Failing the emission test is less of a concern than failing a safety inspection. Emission testing failure could be as simple and innocuous as the car having a loose gas cap and setting a DTC. But...

Q: Hearing "rattling" noise in engine area

The vacuum pump in these vehicles is known to have a rattle noise that sounds like it is in the engine. In order to get rid of the noise, the pump will likely need to be replaced. Before replacing the...

Q: Code p0128

Code P0128 is engaged specifically when the engine itself does not get to operating temperature in a specified time period. The only things that can cause this problem is an issue with the thermostat, head temp sensor, and the coolant...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.