Service engine light

[skidmark]

I have a 2002 Yukon 5.3, 33000 miles, and the service engine soon light is on, onstar said it was an emission problem, any suggestions? coolant temp sensor, EGR valve, O2 sensor ?

[GM-Tech]

coolant temp sensor, EGR valve, O2 sensor ?

 

Yep, something like that. If I could tell you what it is over the internet with no information, I wouldn't be workin' in a dealership. I'd be making tons of money diagnosing these things without even seeing them!

[skidmark]

coolant temp sensor, EGR valve, O2 sensor ?

 

Yep, something like that. If I could tell you what it is over the internet with no information, I wouldn't be workin' in a dealership. I'd be making tons of money diagnosing these things without even seeing them!

 

<{POST_SNAPBACK}>

 

 

 

DTC was P1153, I replaced the upstream bank 2 sensor and it's fixed, thanks