P1346 – Lexus DTC

Lexus DTC P1346 – VVT Sensor Rang/Performance Problem (Bank 1)

DTC P1346 meaning on Lexus

DTC P1346 for Lexus indicates a VVT (Variable Valve Timing) Sensor Range/Performance Problem on Bank 1. This diagnostic trouble code is specific to the VVT system on the engine, which is responsible for adjusting the timing of the intake and exhaust valves for optimal performance.

Lexus DTC P1346 symptoms

Symptoms of DTC P1346 on a Lexus may include:

• Check Engine Light illuminated on the dashboard
• Engine running rough or misfiring
• Reduced fuel efficiency
• Lack of power or acceleration

Lexus DTC P1346 causes

Common causes of DTC P1346 on a Lexus include:

• Faulty VVT sensor
• Wiring or connector issues in the VVT sensor circuit
• Low engine oil level or poor quality oil
• Internal engine mechanical problems affecting VVT operation

Lexus DTC P1346 seriousness

DTC P1346 should not be ignored as it can lead to poor engine performance and potential long-term damage if left unresolved. It is recommended to address this issue promptly to prevent further complications.

How to diagnose DTC P1346 on Lexus

To diagnose DTC P1346 on a Lexus, follow these steps:

1. Use an OBD-II scanner to retrieve the specific fault code and freeze frame data.
2. Inspect the VVT sensor and its wiring for any visible damage or corrosion.
3. Check the engine oil level and quality to ensure proper lubrication for the VVT system.
4. Perform a visual inspection of the VVT system components for any signs of wear or malfunction.

How to fix DTC P1346 on Lexus

To fix DTC P1346 on a Lexus, consider the following steps:

1. Replace the faulty VVT sensor if it is determined to be the cause of the issue.
2. Repair any damaged wiring or connectors in the VVT sensor circuit.
3. Ensure the engine oil is at the correct level and of the recommended quality.
4. If internal engine issues are suspected, consult a professional mechanic for further diagnosis and repair.

How to erase DTC P1346 on Lexus

To erase DTC P1346 on a Lexus:

1. Use an OBD-II scanner to clear the fault code from the vehicle’s computer.
2. After clearing the code, perform a test drive to ensure the issue has been resolved.
3. If the Check Engine Light does not reappear, the DTC P1346 has been successfully erased.

Recommended tools for Lexus diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.