P0171 - Chevy Cobalt Forum / Cobalt Reviews / Cobalt SS / Cobalt Parts
Problems and Service Talk about any mechanical problems you are having

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post #1 of 3 (permalink) Old 11-23-2016, 06:10 PM Thread Starter
Join Date: Jun 2016
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My car has the dreaded "P0171" code. So far, I've cleaned the MAF and TB, replaced the fuel filter and number one o2 sensor, but the code still comes up. I can't find any leaks in the intake or exhaust system. The car runs great with no decrease in gas mileage or performance and no idle problems. What should I check next?
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post #2 of 3 (permalink) Old 11-25-2016, 06:46 PM Thread Starter
Join Date: Jun 2016
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Found the leak. The duct between the air box and throttle body was cracked where it attaches to the throttle body. Bought one from a junk yard fo $20, cleared the code (disconnect the battery) and no more "P0171!!!!"
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post #3 of 3 (permalink) Old 11-25-2016, 06:58 PM
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