DTC P0134: Heated Oxygen Sensor Circuit No Activity Detected (Bank 1 Sensor 1) Or DTC P0154: Heated Oxygen Sensor Circuit No Activity Detected (Bank 2 Sensor 1): Notes

WARNING: This page is about a different car, the 2003 Toyota Tundra. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: If Engine Control Module (ECM) replacement is instructed in following test, always ensure ECM electrical connectors and ground circuits are okay. If either are defective, repair and repeat testing to confirm ECM malfunction.