Q: Check Engine code P128

asked by on

I have Check Engine Code P0128. Autozone is telling me that it is my Coolant thermostat sensor. Others are telling me it could be the whole thermostat needing replaced. Is there any way to know which before ordering parts?

My car has 70000 miles.
My car has an automatic transmission.

the most common cause for this code is the thermostat replacement. The computer expects the engine to get to a temperature within a set amount of time and a stuck open thermostat will cause it not to reach operating temperature.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Check Engine code P128

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: When replacing ball joints can you just replace the ball joints or do you have to replace the whole control arm?

The ball joint on this vehicle can be replaced separately from the lower control arm. However, on this vehicle it is also a known problem where the ball joint becomes loose inside the mounting in the lower control arm and...

Q: Squeaky sound in the front end. 2014 Chrysler 200

Hello - it is not likely a lube job will correct this - there are not that many components in the suspension these days that are grease-able. The squeak you hear could be the strut bearing plates, which tend to...

Q: How to clean carbon buildup on a 2015 Eco Boost Mustang

It's easy, your catch can isn't going to stop it, so when you put that on you don't have to worry. But to clean it now, all you have to do is take off any big vacuum on the intake...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...