Mike's Workshop Manuals
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Chevrolet
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2009
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Traverse LS, AWD
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Repair and Diagnosis
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Engine Performance
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System
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Engine Control System & Fuel System - 3.6L - DTC P0638 To DTC P2635
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DTC P2232 or P2235
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Conditions for Setting the DTC
Conditions for Setting the DTC
The ECM detects that the HO2S signal voltage increases greater than 2 volts within 40 ms, in 4 out of 6 HO2S heater switch OFF samples.
The condition exists for greater than 1 second, or for a cumulative of 10 seconds.