P0385 Code - Crankshaft Position Sensor 'B' Circuit

What Does P0385 Mean?

The PCM has detected a voltage signal from the CPS that exceeds the maximum allowable variation from manufacturer’s specifications.

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What are the common causes of P0385 ?

• A large air leak at or near the number one oxygen sensor would also cause a lean mixture.
• Faulty IMRC actuator relay (if equipped)
• Some aftermarket accessories and performance modifications

How do you troubleshoot P0385 ?

After running the OBD-II scanner and testing the vehicle, the mechanic will then start to look at the possible causes of the problem in the vehicle. They will inspect the crankshaft gear, the position sensor, and sensor connectors to see if there is any damage if there is no RPM reading. The mechanic may need to replace the CKP sensor. They may also need to repair an open or a short in the wiring to the crank sensor. Once they’ve made repairs, they will reset the code and test the vehicle again to see if it solved the problem or not.



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