P0402 CODE

2002 Lincoln LS

Tiny

sunseeker

December, 1, 2011 AT 4:05 PM

I have ls 3.9 the p0402 code keeps haunting me. I have replaced the left bank 02 sensors, egr valve and the egr pressure sensor. The car run great with no hesitation so I don't think its a cat. Each time I have replaced a component I have disconnect my battery to reset the code, and it keeps coming back.

FOUND 19 RELATED QUESTIONS

1 Answer

Tiny

ASEMaster6371

December, 2, 2011 AT 4:08 AM

First, I would verify both vacuum and exhaust are present at the egr valve. If one is missing, it needs to be repaired.
Did you mean the dpfe sensor? This is a common failure.
Does the solenoid work? And if it does, does it pass vacuum and open the valve?
There is a lot to this system and you need some help from a shop. Throwing parts at it is expensive and most likely wrong.

Roy

Please login or register to post a reply.

Crank Angle Sensor Replacement Mercedes Benz
Oxygen Sensor Replacement Honda Civic 1996-20
Oxygen Sensor Replacement Dodge Stratus