2003 Chevy Trailblazer 2003 TRAILBLAZER DTC TROUBLE CODE P0

2003 CHEVROLET TRAILBLAZER
145,511 MILES • 6 CYL • 2WD • AUTOMATIC
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DCCPACE
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MY 03 TRAILBLAZER HAS TWO DTC'S P0128, AND P0172. I FIGURE 128 IS THE THERMOSTAT, BUT 172 ONLY SAYS BANK 1 TOO RICH. COULD THIS BE THE 02 SENSOR .
Jan 5, 2010 at 6:36 PM
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BRIAN 1
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reprogramm the ECM with the latest software to correct P0172.there is a software update for this problem.
Jan 6, 2010 at 8:47 AM