P0390 Code - Camshaft Position Sensor 'B' Circuit Bank 2

P0390 indicates a malfunction in the Camshaft Position Sensor 'B' Circuit on Bank 2, meaning the sensor is not sending proper signals to the engine control module (ECM).

Symptoms may include difficulty starting the engine, poor acceleration, rough idling, reduced fuel efficiency, and the check engine light being illuminated.

Common causes include a faulty camshaft position sensor, damaged wiring or connectors, a failed ECM, or issues with the timing components.

Driving with P0390 is not recommended, as it may cause engine performance issues that could lead to further damage or unsafe driving conditions.

Diagnosis involves using an OBDII scanner to confirm the code, inspecting the wiring and connectors for damage, testing the camshaft position sensor, and checking the timing system for alignment issues.

Repairs may include replacing the faulty camshaft position sensor, repairing or replacing damaged wiring or connectors, and checking the timing system for proper alignment.

Sensor 'B' on Bank 2 is typically located near the exhaust camshaft of the engine on the side of the engine opposite Bank 1.

Repair costs can vary but typically range from $100 to $300 for parts and labor, depending on whether only the sensor or additional components need replacement.

Clearing the code may turn off the check engine light temporarily, but the underlying issue must be resolved to prevent the code from returning.

While unlikely, issues with the crankshaft position sensor can sometimes interfere with camshaft sensor readings. However, the primary focus should be on the camshaft position sensor and its circuit.