Fuel System Monitor
FUEL SYSTEM MONITOR OPERATION
| DTCs |
P0171, P0172 |
| Monitor execution |
Continuous |
| Monitoring duration |
30 sec. |
| 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 |
| P0172:
Long term + Short term + Lambda difference (measured - target) <= 0.7 |
| P2096:
HO2S feedback average < -1.95% |
| P2097:
HO2S feedback average >= +2.20% |