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#1
08-28-2009, 08:34 AM
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Colorado multiple 02 sensor codes
Very recently my 2004 Colorado started running rough. I soon discovered a check engine light and plugged in my OBD reader. I came up with P0030, P0036, P0135, & P0141 codes. All codes are telling me BOTH my O2 sensors and sensor heater circuits are no good. I'm having a hard time believing both sensors would go bad at the same time. Resets haven't worked. Any experience or advice (otherthan taking the truck to a dealership), would be greatly appreciated.
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#2
08-28-2009, 09:24 AM
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Re: Colorado multiple 02 sensor codes
Get a good wiring diagram. http://www.alldata.com/ They have a years subscription for around $29.00 I would check for power to the sensor heater.
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#3
08-29-2009, 06:00 PM
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Re: Colorado multiple 02 sensor codes
Rhandwor, many thanks and my appreciation for your suggestion. In my initial investigation, I had inadvertantly put the 02 heater voltage fuse back in the wrong slot, so of course it never would have worked. I went to AllData.com, bought a subscription, and started at the beginning (meaning the fuse block), and found the problem. Thanks again, I'm sure your help saved me a LOT of $$$, and a few headaches!
Mike
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