P0388 Fault Code

Crankshaft Position Sensor B Circuit High Input

• What does that mean?
• Symptoms
• Causes
• Solutions

The P0388 error code indicates that there is a fault with the Crankshaft Position Sensor B Circuit. This could be due to high voltage input in the circuit, which might lead to incorrect readings of the crankshaft position. The crankshaft position sensor is essential for engine timing and fuel delivery, thus affecting the vehicle's overall performance.

What are the symptoms of the P0388 code?

Common symptoms associated with a P0388 code include:

• Engine misfires or rough idling
• Difficulty starting the engine
• Decreased engine performance
• Illuminated check engine light on the dashboard
• Erratic engine behavior during acceleration.

What causes the P0388 code?

Several issues could lead to the P0388 code, including:

• A faulty Crankshaft Position Sensor B
• Damaged wiring or connectors in the circuit
• Poor electrical connections leading to high voltage readings
• Issues with the Engine Control Module (ECM) that interprets the signals from the sensor.

How to fix P0388?

To resolve the P0388 error code, consider the following solutions:

• Inspect and repair any damaged wiring or connectors in the Crankshaft Position Sensor circuit.
• Replace the Crankshaft Position Sensor B if it is found to be faulty.
• Clear the trouble code and perform a test drive to determine if the issue is resolved.
• If the problem persists, further diagnose the Engine Control Module for faults.