DTC P0134: Heated Oxygen Sensor No. 1 Circuit - No Activity Detected: 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) voltage input is less than 0.5 volts. MIL is illuminated when ECM detects malfunction during 2 consecutive drive cycles. Possible causes are:
- ECM malfunction.
- Exhaust system malfunction (leak).
- Fuel system malfunction (low fuel level).
- HO2S-1 malfunction.
- HO2S-1 circuit malfunction.