What Is Engine Code P0128

Engine Code P0128

P0128 is a generic OBD-II trouble code that indicates that the engine coolant temperature (ECT) sensor has gone bad. This means that the sensor is not sending accurate readings to the engine computer, which can cause a number of problems.

In the body of your response, you can expand on this answer by explaining what the ECT sensor does, why it’s important, and what the symptoms of a bad ECT sensor are. You can also include information on how to diagnose and repair a P0128 code.

So What Is Engine Code P0128?

P0128 is a generic OBD-II code that indicates that the engine coolant temperature ECT sensor has gone bad. The ECT sensor is responsible for sending a signal to the PCM Powertrain Control Module about the temperature of the engine coolant. If the PCM receives a signal that is out of range, it will set P0128.

Symptoms of a P0128 code include:

Engine temperature gauge reading higher than normal
Engine running hot
Check Engine Light illuminated

To fix P0128, you will need to replace the ECT sensor.

What Does P0128 Mean?

P0128 is a generic OBD-II trouble code that indicates that the engine coolant temperature (ECT) sensor has gone bad. This code is set when the PCM (Powertrain Control Module) receives a signal from the ECT sensor that is outside of the normal operating range.

What Causes Engine Code P0128?

There are a number of things that can cause P0128, including:

A faulty ECT sensor
A damaged wiring harness
A bad ground connection
A problem with the PCM

What are the Symptoms of Engine Code P0128?

Symptoms of P0128 can include:

A check engine light on the dashboard
A decrease in fuel economy
A rough idle
A loss of power
Engine overheating

How is Engine Code P0128 Diagnosed?

A mechanic will first use a diagnostic scanner to read the code and check for any other codes. They will then visually inspect the ECT sensor and wiring harness for damage. If the sensor or wiring harness is damaged, it will need to be replaced. If the sensor and wiring harness are in good condition, the mechanic will then check the PCM for any problems.

How is Engine Code P0128 Repaired?

P0128 can be repaired by replacing the ECT sensor, repairing the wiring harness, or fixing the ground connection. If the PCM is bad, it will need to be replaced.

How to Prevent Engine Code P0128

There are a few things you can do to prevent P0128, including:

Keep your coolant levels topped off
Inspect the ECT sensor and wiring harness regularly for damage
Have your PCM checked regularly for problems

Conclusion

P0128 is a common OBD-II trouble code that can cause a variety of symptoms. If you have P0128, it is important to have it diagnosed and repaired as soon as possible to avoid further damage to your engine.

What Is Engine Code P0128