Service Engine Soon

[695MX]

Service Engine Soon light is on 1998 5.7 2500 4X4

 

This problem is driving me nuts !!!!! This truck runs perfect UNTIL I tow my trailer it is a two place snowmobile trailer so not a big trailer by any means.

 

The codes I have PO174, PO151,PO1153 it seems to drive fine but idles really rough and wreaks of fuel and black smokes out the exhaust. This just doesn't make sense if I stop for three stop lights it will idle like S@#! the next one is fine the next one like S@#! again. If I clear the codes and don't tow my trailer no problems runs great !!!

 

Any ideas or direction I should look in?

[joedunlevy]

Service Engine Soon light is on 1998 5.7 2500 4X4

 

This problem is driving me nuts !!!!! This truck runs perfect UNTIL I tow my trailer it is a two place snowmobile trailer so not a big trailer by any means.

 

The codes I have PO174, PO151,PO1153 it seems to drive fine but idles really rough and wreaks of fuel and black smokes out the exhaust. This just doesn't make sense if I stop for three stop lights it will idle like S@#! the next one is fine the next one like S@#! again. If I clear the codes and don't tow my trailer no problems runs great !!!

 

Any ideas or direction I should look in?

 

<{POST_SNAPBACK}>

 

 

My OBDII trouble code chart says it could be an oxygen sensor on the right side

(pre converter)

[695MX]

Service Engine Soon light is on 1998 5.7 2500 4X4

 

This problem is driving me nuts !!!!! This truck runs perfect UNTIL I tow my trailer it is a two place snowmobile trailer so not a big trailer by any means.

 

The codes I have PO174, PO151,PO1153 it seems to drive fine but idles really rough and wreaks of fuel and black smokes out the exhaust. This just doesn't make sense if I stop for three stop lights it will idle like S@#! the next one is fine the next one like S@#! again. If I clear the codes and don't tow my trailer no problems runs great !!!

 

Any ideas or direction I should look in?

 

<{POST_SNAPBACK}>

 

 

My OBDII trouble code chart says it could be an oxygen sensor on the right side

(pre converter)

 

<{POST_SNAPBACK}>

 

 

 

 

It is a Bosch that is only 3 months old but I am not saying it isn't bad? I just don't want to be replacing parts until I find the problem. I have heard good and bad things about Bosch o2 sensors so maybe I should put a AC one in?

[695MX]

No Ideas ? Did I provide enough info?

[GM-Tech]

The codes I have PO174, PO151,PO1153 it seems to drive fine but idles really rough and wreaks of fuel and black smokes out the exhaust.

 

The P0174 says it's lean, but since it sounds like it's not lean, I'd be looking at those other two codes, which are for oxygen sensor 1 in bank 2. If you've recently replaced the sensor for the same issue, it's unlikely two of them are causing the exact same problem. If it was replaced for some other reason, it could be the culprit.

[695MX]

The codes I have PO174, PO151,PO1153 it seems to drive fine but idles really rough and wreaks of fuel and black smokes out the exhaust.

 

The P0174 says it's lean, but since it sounds like it's not lean, I'd be looking at those other two codes, which are for oxygen sensor 1 in bank 2. If you've recently replaced the sensor for the same issue, it's unlikely two of them are causing the exact same problem. If it was replaced for some other reason, it could be the culprit.

 

<{POST_SNAPBACK}>

 

 

 

 

 

I replaced it for the PO174 code which actually never fixed the problem? Hmmm Iam stumped?