Fuel System Monitor
OPERATION (1 OF 2)
| DTCs | P0171, P0172 |
| Monitor execution | Continuous |
| Monitoring duration | 30 sec. |
OPERATION (2 OF 2)
| DTCs | P2096, P2097 |
| Monitor execution | Continuous |
| Monitoring duration | 5 sec. |
ENABLE CONDITIONS
| Parameter | Min. | Max |
|---|---|---|
| P0171, P0172 | ||
| A/F feedback | Closed loop | |
| Engine speed | 500 RPM | - |
| MAF sensor | No DTC (P0102, P0103) | |
| A/F sensor | No DTC (P0131, P0132, P2237) | |
| Barometric pressure | 75 kPa | - |
| P2096, P2097 | ||
| Time after HO2S feedback closed loop | 5 sec. | |
| MAF sensor | No DTC (P0102, P0103) | |
| A/F sensor | No DTC (P0131, P0132, P2237) | |
| HO2S | No DTC (P0137, P0138) | |
| Fuel system | No DTC (P0171, P0172) | |
TYPICAL MALFUNCTION THRESHOLDS
| P0171: Long term + Short term + Lambda difference (measured - target) >= 1.3 (A/T), 1.25 (M/T) |
| P0172: Long term + Short term + Lambda difference (measured - target) <= 0.75 (A/T), 0.7 (M/T) |
| P2096: HO2S feedback average < -2.8% |
| P2097: HO2S feedback average >= +2.8% |