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Home >> Chevrolet >> 2001 >> Cavalier LS, 2.2 4 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics - 2.2L & 2.4L >> Diagnostic Tests >> DTC P1133: O2S1 Insufficient Switching >> Description

DTC P1133: O2S1 Insufficient Switching: Description

PCM continuously monitors Oxygen Sensor (O2S1) activity for 100 seconds. During monitor period, PCM counts number of times O2S1 switches from rich to lean and from lean to rich. You can determine a total for all switches with this information. If number of switches is too low, DTC P1133 will set.

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