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Engine-Codes – Generic – P0393

P0393 Code - Camshaft Position Sensor 'B' Circuit High Bank 2

Quick Answer

The diagnostic trouble code P0393 indicates a problem with the Camshaft Position Sensor 'B' Circuit High in Bank 2. Common causes include Faulty camshaft position sensor, Wiring issues or shorts in the sensor circuit, ECM software malfunction. 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
P0393 indicates Camshaft Position Sensor 'B' Circuit High Bank 2.
Common causes
Common causes include Faulty camshaft position sensor, Wiring issues or shorts in the sensor circuit, ECM software malfunction.
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 17, 2024
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Code P0393 Description

The diagnostic trouble code P0393 indicates a problem with the Camshaft Position Sensor 'B' Circuit High in Bank 2. This sensor plays a crucial role in monitoring the position of the camshaft in relation to the crankshaft, providing essential data for the engine control module (ECM) to determine ignition timing and fuel injection. When this code is triggered, it means that the signal from the camshaft position sensor in Bank 2 is registering as too high, which can lead to issues with engine performance and efficiency.

OBDII Code P0393 - Camshaft Position Sensor 'B' Circuit High Bank 2
P0393 Code - Camshaft Position Sensor 'B' Circuit High Bank 2

Common Causes of P0393

  1. Faulty camshaft position sensor
  2. Wiring issues or shorts in the sensor circuit
  3. ECM software malfunction
  4. Mechanical engine problems affecting camshaft position
  5. Incorrect camshaft timing due to a worn timing belt or chain

Symptoms of P0393

  1. Engine misfires or rough idling
  2. Decreased fuel efficiency
  3. Engine stalling or hesitation
  4. Check Engine Light illuminated
  5. Loss of power during acceleration

How to Fix P0393

  1. Begin by diagnosing the issue with a scan tool to confirm the P0393 code and pinpoint the exact cause.
  2. Inspect the wiring and connections related to the camshaft position sensor for any damage or corrosion. Repair or replace as needed.
  3. Test the camshaft position sensor for proper operation using a multimeter. Replace the sensor if it is found to be faulty.
  4. Check the camshaft timing to ensure it is correctly aligned. Adjust or replace the timing belt or chain if necessary.
  5. Clear the trouble code from the ECM memory and perform a test drive to verify that the issue has been resolved.

Cost to Fix P0393

The typical repair costs for addressing the P0393 code can vary depending on the specific cause of the issue. In general, replacing a faulty camshaft position sensor can cost between $50 and $200, while addressing wiring or connection issues may range from $100 to $300. If the problem is related to mechanical engine issues or timing belt/chain replacement, the repair costs can increase significantly, potentially ranging from $500 to $1500 or more. It's important to consider the diagnosis time and labor rates at auto repair shops, which can vary based on location, vehicle make and model, and engine type. It's advisable to consult with a professional mechanic to get an accurate estimate for the repair.

What does this mean?

Tech Notes for P0393

Sometimes and in some models, low battery voltage or a weak starter can trigger a Camshaft Position Sensor code.

When is the Code Detected?

The camshaft position sensor signal sent to the Engine Control Module (ECM) is too high

Need more information about the P0393 code?

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Code P0393 Information for Specific Makes

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.

Frequently Asked Questions about P0393 Code

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