P1491 – Honda DTC

Honda DTC P1491 – EGR Valve Lift Insufficient Detected

DTC P1491 meaning on Honda

DTC P1491 on a Honda indicates that the EGR (Exhaust Gas Recirculation) valve lift sensor has detected insufficient lift during operation.

Honda DTC P1491 symptoms

Symptoms of DTC P1491 on a Honda may include:

• Check Engine Light illuminated
• Decreased engine performance
• Increased emissions

Honda DTC P1491 causes

Common causes of DTC P1491 on a Honda include:

• Malfunctioning EGR valve
• Blocked EGR passages
• Faulty EGR valve lift sensor

Honda DTC P1491 seriousness

DTC P1491 should be addressed promptly as it can lead to increased emissions, reduced fuel efficiency, and potential engine performance issues.

How to diagnose DTC P1491 on Honda

To diagnose DTC P1491 on a Honda, you can:

1. Use an OBD-II scanner to retrieve the trouble codes
2. Inspect the EGR valve and associated components for any signs of damage or blockages
3. Test the EGR valve lift sensor for proper operation

How to fix DTC P1491 on Honda

To fix DTC P1491 on a Honda, you may need to:

1. Clean or replace the EGR valve if it is faulty
2. Clean out any blockages in the EGR passages
3. Replace the EGR valve lift sensor if it is malfunctioning

How to erase DTC P1491 on Honda

To erase DTC P1491 on a Honda, you can:

1. Use an OBD-II scanner to clear the trouble codes
2. Ensure that the underlying issue causing the code has been resolved
3. Perform a test drive to verify that the code does not return