Code

[maximus44]

Hi, I'm getting:
KOEO code 337 - EGR valve position or Exhaust Pressure Transducer circuit above maximum voltage
KOER code 136 - Lack of Heated Oxygen Sensor switch during KOER indicates lean bank 2

I replaced the DFPE sensor a couple months ago. It fixed the CEL light for about two weeks, then it came on again. The sensor was replaced with an aftermarket one, and I also replaced the vacuum lines. Could it need replacing again already?

And the 136? Caused by the malfunctioning EGR system?

Thanks for any assistance!!!
'95 Explorer XLT

 

[maximus44]

Any thoughts?

 

[marragtop]

When you replaced the DPFE sensor, did you make sure the vacuum lines on it were good? Also, make sure they haven't come loose.

 

[maximus44]

Thanks for the reply!
Yes, I replaced the vacuum lines also. And I've checked to make sure they are still secure.
I ordered a new Motorcraft DPFE sensor and should be replacing it this weekend. I will give an update.

For those Canadian buyers:

Ford Dealership -Motorcraft DPFE sensor= $218 + $30tax = $248Cdn

www.rockauto.com -Motorcraft DPFE sensor= $80 + $20ship + $20tax= $120US

go figure........

 

[maximus44]

So I replaced the DPFE sensor. No more "check engine" light. Hopefully it will last longer than the two weeks that the aftermarket sensor lasted.

The new Motorcraft sensor came with a new connector. This required cutting off the old connecter and splicing the new connector to the harness. It wasn't too difficult.

 

[rocket22]

What did the car run like with a bad DPFE?

Was it rumbling at idle and surging?

 

[marragtop]

My 95 ran fine. CEL light came on, and was throwing EGR codes. Based on what I read on this forum, I replaced the DPFE sensor and cleared the codes. CEL has stayed off and there are no codes.

 

[rocket22]

What is the risk if I keep running it like this?

EGR is not connected, vaccum line to EGR is capped. The truck has never run better. I dont need to pass emissions with this truck anymore.

 

[aldive]

EGR is not connected, vaccum line to EGR is capped. The truck has never run better. I dont need to pass emissions with this truck anymore.

You gas mileage will suffer.