How to read CEL code on 99 silverado??
January 12th, 2012, 2:18 PM
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How to read CEL code on 99 silverado??
Whats up everybody, i added a new silverado to the gang just yesterday. Shes a 1999 Chevy Silverado 2500 Extended cab. The dude i got it from hadnt serviced her in quite a while and it shows. Engine just doesnt feel stable so yesterday i did a whole tune up yesterday hoping this would cure her but no go. The CEL light is still on so i was wondering how do i real the CEL code?? I searched but couldnt find a previous thread about this. Thanks ahead of time!
January 12th, 2012, 2:36 PM
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go to the local auto store(o' rielly, autozone) they have scanners there you can use to look at the code. Or even the local dealership should be able to read them too
January 12th, 2012, 2:41 PM
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Kool, thanks man. Do you know about how much they charge?? I just thought you could connect two wires and the CEL light would blink giving you a code telling you what was wrong like in my Honda 
January 12th, 2012, 9:14 PM
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I got it checked out for free at AAMCO. They read 3 codes:
PO200 Injector- Circuit malfunction(wiring, injector, ECM)
PO301 Cylinder 1- Misfire detected
PO137 Heated O2 sensor
While i was replacinf the spark plus and wires i noticed that the Back Left wire wasnt even attached to the spark plug. Im guessing this is cylinder number 1. Im going to try and reset the ECU tomorrow morning. Hopefully this helps. What do you guys think?? What would seem like the most reasonable thing going wrong that could cause all these?? I was thinking the 02 sensor just came up bc since i was running on 7 cylinders the o2 sensor was getting the wrong readings. Any comments or concerns are greatly appreciated
PO200 Injector- Circuit malfunction(wiring, injector, ECM)
PO301 Cylinder 1- Misfire detected
PO137 Heated O2 sensor
While i was replacinf the spark plus and wires i noticed that the Back Left wire wasnt even attached to the spark plug. Im guessing this is cylinder number 1. Im going to try and reset the ECU tomorrow morning. Hopefully this helps. What do you guys think?? What would seem like the most reasonable thing going wrong that could cause all these?? I was thinking the 02 sensor just came up bc since i was running on 7 cylinders the o2 sensor was getting the wrong readings. Any comments or concerns are greatly appreciated
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