DTC P0138 Or P0140: Condition
WARNING: This page is about a different car, the 2002 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Power Control Module (PCM) detects maximum HO2S No. 2 voltage input is to high or too low. MIL is illuminated when PCM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- HO2S No. 2 malfunction.
- Fuel system malfunction.
- PCM malfunction.