Re: P0171 and P0174, base engine
Just a thought but occasionally I have a "pending" P0410, secondary air pump but never becomes a fault. Could they be related ?
Gas and oil caps have been replaced and are tight.
Replace primary O2 sensors.
Throttle position looks good and proper change on movement.
Last edited by Padgett; Feb 25, 2020 at 10:48 AM.