Question

1998 Ford Mustang GT with engine code P0401, what is the meaning?

Answer 1

Hi there,

This code is for egr insuffcient flow detected.

This can be the result of a problem with the EGR itself, the egr solenoid or a plugged egr tube. Any of these will cause this code. If you have exhaust leaks you may also find this code to appear and even a weak battery could be the problem.

Answer 2

P0401 FORD - Exhaust Gas Recirculation Flow Insufficient Detected
Read more: https://www.autocodes.com/p0401_ford.html