DTC P0134: Heated Oxygen Sensor No. 1 Circuit - No Activity Detected: Condition
WARNING: This page is about a different car, the 2003 Suzuki Vitara. 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) circuit voltage input is .45 volt or lower. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- ECM malfunction.
- Fuel system malfunction.
- HO2S-1 malfunction.