DTC P0135: Heated Oxygen Sensor No. 1 - Heater Circuit Malfunction: Condition
WARNING: This page is about a different car, the 2003 Suzuki Aerio. However, it is still accessible from the selected car via links, so may be relevant.
DTC is set when Engine Control Module (ECM) detects Heated Oxygen Sensor No. 1 (HO2S-1) heater circuit voltage input is less or more than predetermined. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- ECM malfunction.
- HO2S-1 malfunction.
- HO2S-1 heater circuit malfunction.