P0393 Fault Code

Camshaft Position Sensor B Circuit High Input (Bank 2)

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

The P0393 fault code indicates that there is a high input signal being detected from the Camshaft Position Sensor B on Bank 2. This sensor plays a crucial role in the engine's timing and performance by monitoring the position of the camshaft. A high input signal can cause the engine control module (ECM) to misinterpret the camshaft's position, leading to incorrect timing adjustments and potential engine performance issues.

What are the symptoms of the P0393 code?

• Check Engine Light is illuminated
• Rough idling or stalling
• Decreased engine performance or power
• Poor fuel economy
• Difficulty starting the engine

What causes the P0393 code?

• Faulty Camshaft Position Sensor B
• Wiring issues such as short circuits or frayed connections
• Corroded connectors leading to poor electrical contact
• Issues with the engine control module (ECM)
• Timing chain or belt problems affecting camshaft position

How to fix P0393?

• Inspect and repair any damaged wiring or connectors related to the Camshaft Position Sensor B.
• Replace the faulty Camshaft Position Sensor B if it is not functioning correctly.
• Check the timing belt or chain to ensure it is aligned correctly and not worn out.
• Clear the fault code and test drive the vehicle to see if the issue reoccurs.