2004 Hummer H2 Code P0155 Came On Put New 02 Senser Cleared Stays Off Drive Shut

2004 HUMMER H2
107,000 MILES
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Code p0155 came on I put new 02 senser in cleared code it stays off when I drive it then shut key off state it back up shortly after light comes back on. Any idea???
Mar 25, 2013 at 5:05 AM
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ASEMASTER6371
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codes never identify bad parts, just failed systems.

which sensor did you replace???

Roy
Mar 25, 2013 at 10:43 AM
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