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Codes and running rich..Need some help!

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Old 03-08-2015, 09:57 PM
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Exclamation Codes and running rich..Need some help!
Car has been running rich for a few months and I get codes P0121 and P0171 once a week or 2 weeks..UEGO is showing 10.0 during WOT and black smoke is pretty bad..What could be my issue tune is fine?
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Old 03-09-2015, 01:45 PM
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Anybody?
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Old 03-09-2015, 01:54 PM
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OBD-II Trouble Code: P0121 Throttle Position Sensor/Switch A Circuit Range/Performance Problem
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Old 03-09-2015, 05:06 PM
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Thanks I know what the codes for I jus mean has anybody bad the issue and know to fix it
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Old 03-09-2015, 07:55 PM
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Well what does the code say? Throttle position sensor. Try a new throttle body.
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Old 03-09-2015, 08:29 PM
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Ive been looking for one I jus dont have 200 bucks atm
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Old 03-10-2015, 11:12 AM
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https://www.cobaltss.net/forums/part...e-body-316145/
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Old 03-10-2015, 12:07 PM
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post what the codes mean
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Old 03-10-2015, 12:19 PM
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if the car was fine then went stupid rich i would check the o2 sensor to see if its working if one sensor is off it seems to throw every thing out another thing the p0171 is for pcm not throttle plate
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Old 03-10-2015, 06:17 PM
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I'll definitely check it.. The P0121 is for the tps sensor and from what I've read and seen on protean.. Bad tb is the problem and it can set p0171
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