| DTC | Definition |
|---|---|
| P0135 | Heated Oxygen Sensor Circuit (Bank No. 1, Sensor No. 1) |
| P0141 | Heated Oxygen Sensor Circuit (Bank No. 1, Sensor No. 2) |
| P0155 | Heated Oxygen Sensor Circuit (Bank No. 2, Sensor No. 1) |
| P0161 | Heated Oxygen Sensor Circuit (Bank No. 2, Sensor No. 2) |
DTC P0135, P0141, P0155 & P0161 DEFINITION
Note. Bank No. 1 refers to bank that includes cylinder No. 1. Bank No. 2 refers to bank without cylinder No. 1. Sensor No. 1 refers to sensor closest to engine block. Sensor No. 2 refers to sensor furthest from engine block.
| CAUTION | If ECM replacement is instructed in following testing, always ensure ECM harness connector and ground circuit are okay. If either are suspect, repair and repeat testing to confirm ECM malfunction. |