IMCA38
Silver Member
- Joined
- Jun 29, 2003
- Messages
- 171
- Location
- SE Nebraska
- Tractor
- MF 1225 w/loader, Case 1840 SS, Ransomes 723D mower
Any Chevy techs here that can help me out?
I have a 2005 K1500 with 5.3L V8. (code T if that matters)
A while back, I had the check engine light coming on under hard acceleration.
I scanned for codes and got a code for MAF problem (101 I think). I checked for air leaks, cleaned the MAF and cleaned the K/N filter. Still had the light, so I replaced the MAF. That took care of the light coming on under acceleration.
However- A few days later, the light came on again while sitting at a red light idling. Re-scanned and now shows code 171 and 174 for lean on left and right. After reading some Chevy forums, it sounded like an intake gasket leak might be the problem. I did the carb cleaner test up and down the intake and didn't find anything.
Given this information, are the upstream oxygen sensors the likely culprit now?
Thanks!
Todd
I have a 2005 K1500 with 5.3L V8. (code T if that matters)
A while back, I had the check engine light coming on under hard acceleration.
I scanned for codes and got a code for MAF problem (101 I think). I checked for air leaks, cleaned the MAF and cleaned the K/N filter. Still had the light, so I replaced the MAF. That took care of the light coming on under acceleration.
However- A few days later, the light came on again while sitting at a red light idling. Re-scanned and now shows code 171 and 174 for lean on left and right. After reading some Chevy forums, it sounded like an intake gasket leak might be the problem. I did the carb cleaner test up and down the intake and didn't find anything.
Given this information, are the upstream oxygen sensors the likely culprit now?
Thanks!
Todd