Hi - Any help is appreciated. I have a

1993 sable 3.8

It runs fine (no noticeable problem) except that the check engine light goes on occassionally. I pulled the codes for KOEO and they are:

Current Code - 335: EGR sensor circuit voltage higher or lower than expected

Memory Codes - 57: neutral pressure switch circuit fault; 332: Insufficient EGR flow

For about a year now, the lamp would go on if I went down hill for a few minutes, but would then go out once I was climbing or on flat ground. I didn't notice any problems besides that, and it was so infrequent, that I ignored it. The light goes on and off daily now.

Do you think this might be a bad EGR valve or...?

(Funny thing is that it just passed smog (CA) no problem!)

Thx!

 

The DPFE sensor has probably failed. Also check the two hoses that go to it.

 

Yes, it was the DPFE sensor. $42 at kragen. Thanks!