Mechanics

TROUBLE

2006 Chevrolet Colorado • 4 cylinder 2WD Manual • 86,000 miles

2006 Colorado 2.8 code P0171. Changed the upstream O2 - MAF and put in new plugs also cleaned the throttle body. No vacumm leaks that can be found. The VVT solenoid moves with voltage- timing and other PID's move with throttle according to Scantool data file. Any ideas?
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Shifter
December 3, 2010.



Have you checked for wiring issues to the O2 sensor?



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