Question

2001 Ford Ranger 4.0L 4x4 has code p0401, what do I need to fix?

Answer 1

HI there

This code points to an issue with the EGR. There are several possible causes for the code. I would check and make sure the air tube for the egr is not blocked.

P0401 FORD - Exhaust Gas Recirculation Flow Insufficient Detected

Read more: https://www.autocodes.com/p0401_ford.html