|
Re: 96 3.1 check engine shows 0401 code
The PCM uses map sensor vacuum to determine EGR flow efficiency, so check the vacuum hose to the MAP sensor for cracks/splits, holes, etc... If that checks out, your next thing to check is the tube that runs from the rear exhaust manifold to the EGR and the EGR itself for carbon deposits.
__________________
Still waiting for the "good old days" I'll get to bore my future grandchildren with!
|