P0390 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0390 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0390 code.

What Does P0390 Code Mean?

OBD-II Code P0390 is defined as a Camshaft Position Sensor "B" Circuit

The Camshaft Position Sensor measures the exact rotational position of the camshaft. This provides a critical data signal used by the engine control module (PCM) to control the fuel injectors and ignition coils. When the PCM detects an irregular signal or no signal, it will set code P0390.

P0390 Symptoms

• Decreased engine performance
• Engine may not start
• Increased fuel consumption

Common Problems That Trigger the P0390 Code

• Broken tone ring
• Camshaft Position Sensor (CMP) failure
• Powertrain Control Module (PCM) failure
• Wiring issue

Common Repairs Needed for the P0390 Code

• Camshaft Position Sensor Replacement