Codes gone wrong?

[ftford]

Have a '97 Explorer XLT 4WD 4.0 engine, showing codes PO153 slow responce,
bank 2 sensor 1,PO401 EGR insufficient flow, and PO402 EGR excessive flow.
What has to be changed and in what order. Could some other part of EGR system be bad?

 

[BrooklynBay]

Welcome to this forum! I've moved your thread into the EEC-V section. It sounds like the DPFE sensor needs no be replaced.

 

[swetrid]

O2 sensor and bad dpfe sensor

 

[ftford]

The DPFE is pastic not metal, which sounds like it has been replaced before, but I think you are right. This may give a false O sensor reading. Thanks, ftford

 

[ftford]

Thanks, what about the EGR valve. Was thinking about replacing it and the dpfe. Engine runs fine and the gas mileage has not changed. ftford

 

[ftford]

Change DPFE sensor today. Will have to wait til I drive 45-50 miles. Found water in sensor on ref side.

 

[ftford]

codes gone wrong

DPFE sonsor was cloged with water. Replaced and drove 80 miles, no check engine light on. Passed NC state inspection.
Thanks to all,
ftford

 

[BrooklynBay]

Thanks for the update! It sounded like it was the DPFE sensor.