DTC P0133: Ho2S No. 1 Circuit, Slow Response: Condition

DTC is set when time for HO2S No. 1 to change from lean to rich or from rich to lean is high. MIL is illuminated when Power Control Module (PCM) detects malfunction during 2 consecutive drive cycles. Possible causes are:

• HO2S No. 1 malfunction.
• PCM malfunction.