driverside lean, bad cat also
11-08-2009, 10:21 PM
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driverside lean, bad cat also The driver side 02 is reading up to +12 at part throttle and cruising. At idle the even or close to even with the right side. I'm also getting some slight misfires according to autotap and a code for a bad left cat. I have already swapped the front 02's from one side to the other and no change.
11-08-2009, 11:52 PM
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the reading your getting seems to be from the 02 sensor behind the cat, not in front. if the cat is bad, you need a new cat. if it is a "efficiency below threhold" replace the cat and clear the codes. Or it sounds like you may have a leak in the exhaust near the cat, if so the code is as simple as fixing your exhaust leak. Converter repairs at a muffler shop run 45 dollars, and they will be glad to clear your code.
11-09-2009, 12:16 AM
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I have a code,efficiency below threshold. However I need to find why I'm running lean on the same side. I had the same code about 6 weeks ago and cleared the code only for it to come back. Wouldn't running lean cause the pcm to the motor to run rich thus ruining the cat?
