P0390 Lexus Code - Camshaft Position Sensor 'B' Circuit Bank 2
Quick Answer
The P0390 diagnostic trouble code (DTC) for Lexus vehicles specifically refers to the Camshaft Position Sensor 'B' Circuit Bank 2. Common causes include Wiring Issues: Corrosion, breaks, or shorts in the wiring connected to the camshaft position sensor can cause this code to trigger, Faulty Sensor: The camshaft position sensor itself may be defective or damaged, leading to incorrect readings, Poor Electrical Connections: Loose or poor electrical connections to the sensor can disrupt the signal and trigger the code. 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 Lexus indicates Camshaft Position Sensor 'B' Circuit Bank 2.
- Common causes
- Common causes include Wiring Issues: Corrosion, breaks, or shorts in the wiring connected to the camshaft position sensor can cause this code to trigger, Faulty Sensor: The camshaft position sensor itself may be defective or damaged, leading to incorrect readings, Poor Electrical Connections: Loose or poor electrical connections to the sensor can disrupt the signal and trigger the code.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0390 Lexus Description
The P0390 diagnostic trouble code (DTC) for Lexus vehicles specifically refers to the Camshaft Position Sensor 'B' Circuit Bank 2. This code indicates that there is a malfunction in the electrical circuit related to the camshaft position sensor in Bank 2 of the engine. The camshaft position sensor plays a crucial role in providing the engine control module (ECM) with information about the position of the camshaft, which is essential for proper fuel injection and ignition timing. When this sensor malfunctions, it can lead to poor engine performance, reduced fuel efficiency, and potential damage to other engine components.
Common Causes of P0390 Lexus
- Wiring Issues: Corrosion, breaks, or shorts in the wiring connected to the camshaft position sensor can cause this code to trigger.
- Faulty Sensor: The camshaft position sensor itself may be defective or damaged, leading to incorrect readings.
- Poor Electrical Connections: Loose or poor electrical connections to the sensor can disrupt the signal and trigger the code.
- ECM Problems: Issues with the engine control module (ECM) can also cause the camshaft position sensor circuit to malfunction.
Symptoms of P0390 Lexus
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
- Engine Misfires: A faulty camshaft position sensor can cause the engine to misfire, resulting in rough idling or hesitation during acceleration.
- Decreased Fuel Efficiency: Issues with the camshaft position sensor can lead to improper fuel injection timing, resulting in decreased fuel efficiency.
- Engine Stalling: In severe cases, a malfunctioning camshaft position sensor can cause the engine to stall unexpectedly.
- Loss of Power: The vehicle may experience a loss of power or reduced performance due to incorrect camshaft position readings.
How to Fix P0390 Lexus
- Diagnose the Issue: Use a diagnostic tool to confirm the P0390 code and pinpoint the specific cause of the problem.
- Inspect Wiring and Connections: Check the wiring and connections related to the camshaft position sensor for any damage or loose connections.
- Replace Camshaft Position Sensor: If the sensor is found to be faulty, replace it with a new, OEM-quality sensor.
- Clear Codes: Clear the DTC from the ECM after the repair is completed to reset the system.
- Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the check engine light does not reappear.
Cost to Fix P0390 Lexus
The typical repair costs for addressing a P0390 code in a Lexus vehicle can range from $150 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the actual costs can vary based on the location of the repair shop, the make and model of the vehicle, and the type of engine. Additionally, diagnostic time and labor rates can influence the final repair cost. It's recommended to consult with a qualified mechanic or repair shop for a more accurate estimate based on the specific circumstances.
Tech Notes for P0390 Lexus
When is the Code Detected?
Need more information about the P0390 Lexus code?
Need more information on how to fix the P0390 Lexus code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0390 Lexus code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0390 Lexus Code
No Frequently Asked Questions about P0390 Lexus Code found.
Discuss the causes and fixes for P0390 Lexus OBDII Code
Code P0390 Lexus comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.