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Engine-Codes – RAM – P0390 RAM

P0390 RAM Code - Camshaft Position Sensor Circuit Bank 2 Sensor 2

Quick Answer

The diagnostic trouble code P0390 refers to an issue with the camshaft position sensor circuit on bank 2 sensor 2. Common causes include Faulty camshaft position sensor, Wiring issues or shorts in the camshaft position sensor circuit, Engine oil contamination affecting sensor performance. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0390 RAM indicates Camshaft Position Sensor Circuit Bank 2 Sensor 2.
Common causes
Common causes include Faulty camshaft position sensor, Wiring issues or shorts in the camshaft position sensor circuit, Engine oil contamination affecting sensor performance.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0390 RAM Description

The diagnostic trouble code P0390 refers to an issue with the camshaft position sensor circuit on bank 2 sensor 2. The camshaft position sensor is a vital component of the engine management system, responsible for monitoring the position of the camshaft to ensure proper timing of the engine's intake and exhaust valves. Bank 2 sensor 2 specifically indicates that the issue is related to the second sensor on bank 2 of the engine, which is typically the side of the engine where cylinder 2 is located.

OBDII Code P0390 RAM - Camshaft Position Sensor Circuit Bank 2 Sensor 2
P0390 RAM Code - Camshaft Position Sensor Circuit Bank 2 Sensor 2

Common Causes of P0390 RAM

  1. Faulty camshaft position sensor
  2. Wiring issues or shorts in the camshaft position sensor circuit
  3. Engine oil contamination affecting sensor performance
  4. Issues with the engine control module (ECM)
  5. Mechanical problems with the camshaft itself

Symptoms of P0390 RAM

  1. Check Engine light illuminated on the dashboard
  2. Engine misfires or runs roughly
  3. Decreased fuel efficiency
  4. Engine stalling or hesitation
  5. Difficulty starting the engine

How to Fix P0390 RAM

  1. Use an OBD-II scanner to confirm the P0390 code and diagnose the specific issue.
  2. Inspect the camshaft position sensor and its wiring for any damage or corrosion.
  3. Replace the faulty camshaft position sensor if necessary.
  4. Clear the error code from the ECM and test drive the vehicle to ensure the issue is resolved.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the engine control module or camshaft.

Cost to Fix P0390 RAM

The typical repair costs for addressing the P0390 code can vary depending on the specific cause of the issue. Generally, replacing a camshaft position sensor can cost between $100 and $300, including parts and labor. Additional costs may arise if further diagnostics or repairs are needed. It's essential to consider the specific labor rates at auto repair shops in your area to get a more accurate estimate.

What does this mean?

Tech Notes for P0390 RAM

In the event of a failure in either the Crankshaft Position (CKP) Sensor or Camshaft Position (CMP) Sensor, the engine can still start. The Powertrain Control Module (PCM) is capable of determining the engine position and initiating startup based on one of these two inputs. However, there may be a small delay in starting as the PCM needs time to establish synchronization. If either the CKP or CMP Sensor signals are absent during engine cranking, a Diagnostic Trouble Code (DTC) is recorded, and the Malfunction Indicator Lamp (MIL) lights up.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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