What is the P00B6 Fault code? How to Fix the P00B6 Fault code?

What is the P00B6 fault number? What is Radiator Coolant Temperature/Engine Coolant Temperature Correlation Failure? How do I fix the P00B6 fault code What are the causes and symptoms of the P00B6 error code?

What is the P00B6 Fault code? What does it mean

If the powertrain controller module (PCM), detects that both the radiator temperature sensor and the engine cooler temperature (ECT), voltage signals are inconsistant, a P00B6 code will be stored.

There may be two coolant temperature sensors on some vehicles. One in the radiator, one in engine. The PCM may compare the coolant temperature inside the radiator to the coolant temperature inside the engine in order to verify that coolant is flowing properly between the radiators and engine cooling channels.

As the coolant warms up, the thermal resistance of the ECT sensor drops. The resistance increases as the engine cools. In turn, the voltage signals that are sent from the ECT sensor into the PCM drop or rise. These voltage fluctuations are detected by the PCM as changes in engine coolant temperature. The data from these sensors are crucial for determining the fuel delivery rate and ignition timing strategy.

If the PCM detects a difference between signals from the radiator coolant temperature sensor or the ECT sensor, it logs error code 00B6.

Chevrolet (especially Cruze), as well as various Land Rover models, are all susceptible to the P00B6 fault codes.

What causes the P00B6 fault code?

– Defective ECT sensor
– Temperature sensor for radiator coolant that is defective
Low coolant level
– Wiring issues (short or long circuits)
– Remove loose or corroded connectors
– Defective PCM

What are the symptoms for the P00B6 Fault code?

These symptoms may be present if you own a vehicle that has the P00B6 code.

– Illumination for check engine light
– Engine overheating
– Temperature abnormalities on the instrument panel
– Increased fuel use
Low engine performance
– Extremely rich exhaust

How to Fix the P00B6 Fault Code

– Check the engine coolant first. If it isn’t, then it should be replaced.
ECT sensor and the radiator coolant temperature sensor wiring should be inspected to ensure that the engine is not heating up. Cables that are damaged, melted, broken, or loose should be repaired. Connectors that have become corroded should be replaced.
– Test the ECT sensor and replace it if it is not working properly.
If the sensor is defective, it should be replaced.