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Home >> Chevrolet >> 2003 >> Impala LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0133: Ho2S Slow Response - Sensor 1 >> Conditions For Setting DTC
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Conditions For Setting DTC

The PCM detects that the HO2S 1 rich-to-lean transition time takes longer than 145 milliseconds.

The PCM detects that the HO2S 1 lean-to-rich transition time takes longer than 135 milliseconds.