How do I fix obd code p0401
How do I fix obd code p0401
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964104
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It appears that code is for insufficient EGR flow.
Some solutions are
- Use a vacuum pump and observe if it opens. If it doesn’t, the valve may need to be cleaned or replaced.
- Clean or Replace the EGR valve.
- Check the voltage at the DPFE, compare to specified values (refer to a manual for your specific model)
- Replace the DPFE sensor (with a good quality / OEM one)
- Inspect all hoses and tubes connected to the EGR system for any blockages or leaks.
- Clean or replace hoses as needed.
EDIT:
It appears you want to know how to replace the EGR valve Egr valve replacement escape
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