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:
- Use an OBD-II scanner to retrieve the trouble codes
- Inspect the EGR valve and associated components for any signs of damage or blockages
- 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:
- Clean or replace the EGR valve if it is faulty
- Clean out any blockages in the EGR passages
- 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:
- Use an OBD-II scanner to clear the trouble codes
- Ensure that the underlying issue causing the code has been resolved
- Perform a test drive to verify that the code does not return
Recommended tools for Honda 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.