97 Mercury cougar xr7 v6. po443, po430, po171, po174,
171 oxygen sensor bank 1 too lean, 174 oxygen sensor bank 2 too lean. 430 catalyst system eff. below. 443 Emission Control System Purge Control Valve Circuit. Could po430 be set by bank 2 sensor that is not reading properly? WHAT DO U RECOMMEND FOR 430, AND 443
Cars & Trucks - Mercury - Cougar - 1997 Mercury Cougar XR7
Answers & Comments
Sounds like you have low fuel supply or a leak in intake system causing lean codes, check fuek pressure and volume first. Cat converter effeciancy could be caused by the lean codes, purge system sounds like solenoid failure, check for high resistance accross purge vent solenoid.