| DTC | Affected Circuit |
|---|---|
| P0133 | Heated O2 Sensor Circuit Slow Response (Bank 1, Sensor 1) |
| P0153 | Heated O2 Sensor Circuit Slow Response (Bank 2, Sensor 1) |
DTC IDENTIFICATION
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.
Circuit Description
The oxygen sensor monitors exhaust gas oxygen content and delivers an input signal to ECM. The ECM uses this input signal to determine fuel injection system operation. Sensors include heater.
DTC P0133 and P0153 are set when engine is warmed up and is idling, ECM detects a response time of 1.1 seconds or more for sensor to change from rich to lean, or lean to rich. Possible cause is
- Heated oxygen sensor.