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#COOLANT THERMOSTAT CHECK ENGINE LIGHT CODE#

If so may change thermostat just to be safe, looks to be wide open and easily changeable myself, at least if sticking it is not sticking closed and overheating. Complete fluid change out in 2018 and am going to compare temp of in car readout and a digital readout pointed at radiator inlet hose to verify both are the same temperatures.

#COOLANT THERMOSTAT CHECK ENGINE LIGHT CODE#

I reset the code and hope my thermostat just was a little sticky and was opened ? My coolant temp was reading about 90 C ( 194 F) but I then idled at home till it got to about 205 F and my electric fan kicked on and temp dropped. I have such a sort ride to work daily 9 miles both ways I doubt my engine gets to normal operating temperatures really. In most cases, if left unchecked, the problem may lead to serious engine damage so stopping by for service as soon as possible is recommended.Coolant thermostat temperature below thermostat regulating temperature code read after engine light came on while driving. The code is usually a result of a faulty Coolant Temperature Sensor or a loose or broken component in the circuit – both of which need replacement to fix this issue. In conclusion, the P0116 code is a generic trouble code that means the computer has detected an issue with the Engine Coolant Temperature Circuit Range/Performance Problem and will cause the MIL (Malfunction Indicator Lamp) to turn on. It may also hit boiling point, which can result in a banging or rumbling sound coming from your engine bay. P0125 – Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature) Conclusion If your thermostat isn’t functioning properly, your coolant may be reaching too high of a temperature resulting in leaks. P0119 - Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem P0118 – Engine Coolant Temperature Circuit Intermittent P0117 – Engine Coolant Temperature Sensor Circuit High Input P0115 – Engine Coolant Temperature Sensor Circuit Low Input Visually inspecting for dirty or loose componentsĪ P0116 is related to and may be accompanied by the following codes:.Replacing the Coolant Temperature Limiter.Replacing the Coolant Temperature Sensor.

You may also see a P0128 error code, which is shown when your engine is having trouble regulating temperature. The following are solutions that may fix this problem: Check engine lights & codes Your check engine light may be one of the first symptoms of a bad thermostat that you’ll notice illuminating on the dash with or without an associated code. The failsafe mode might cause the engine to run erratically and hesitate before getting warm, causing the engine to operate erratically and slowly.

Improperly reading and interpreting Sensor tests.Ī P0116 code is deemed serious since it causes the engine control module to go into a failsafe mode.

Replacing parts without knowing what they do or how they work together.

Assuming that a part is good without actually testing it out.

Not properly identifying the cause of the problem when using Freeze Frame Data.

Not verifying that all engine wiring harnesses are properly connected.

The following are some of the most common mistakes that a technician may make when diagnosing a P0116 code:

Replace any malfunctioning parts such as sensors, relay, control module, etc.

Locate and inspect all wiring harnesses for loose or broken connectors or bad splices.

Test the engine coolant temperature circuit for continuity.

Scan for codes in the ECM and look at the freeze frame data for failure.

To diagnose a P0116 DTC code, a technician would:

In some cases, it's possible that the engine may stall or misfire.

It's also possible that your car won't idle.

The car has a lot of problems with drivability.

MIL (Malfunction Indicator Lamp) illumination The P0128 is a diagnostic trouble code (DTC) for malfunction in coolant thermostat coolant temperature below the thermostat regulating temperature.