SOURCE: Oxygen Sensor on '99 Isuzu Trooper
The O2 sensor is on the engine side (up stream) before the catalytic converter in the exhaust pipe, it is barrel shaped about the size of a jumbo magic marker.
SOURCE: fuel filter change out in 2002 isuzu trooper
easy under the driver side need fuel tool from auto store. 30 min or srew driver push the clips in and pull. carefull lots of gas...
SOURCE: 2000 isuzu trooper: OBD-II Trouble Code: P0401 Insufficient EGR F
Your SUV is really giving you a hard time, lol. Sorry but I've had those days too.
I would try to check if you have blocked EGR passages. If ok check for restricted MAP sensor vacuum hose/passage or restricted exhaust. I know you replaced the CAT but if the muffler is blocked then there would still be a restriction. Also check the wiring and connection to the MAP sensor.
429 views
Usually answered in minutes!
×