Fuel System Monitor
WARNING: This page is about a different car, the 2007 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Operation
FUEL SYSTEM MONITOR OPERATION TABLE
| DTCs | P0171 (for bank 1), P0174 (for bank 2) P0172 (for bank 1), P0175 (for bank 2) |
| Monitor execution | Continuous |
| Sensors / components OK | Phase 1: CKP sensor, IAT sensor, MAP sensor, A/F sensor heater, EGR system, CMP sensor Phase 2: CMP sensor, Barometric pressure sensor, A/F sensor, A/F sensor heater |
| Monitoring Duration | 20 sec. (Phase 1), 30 sec. (Phase 2) |
FUEL SYSTEM MONITOR OPERATION TABLE
| DTCs | P2096 (for bank 1), P2098 (for bank 2) P2097 (for bank 1), P2099 (for bank 2) |
| Monitor execution | Continuous |
| Sensors / components OK | Fuel system, A/F sensor, A/F sensor heater, HO2S, HO2S heater, MAF sensor, IAT sensor, Barometric pressure sensor, ECT sensor, VSS, CMP sensor, CMP sensor |
| Monitoring Duration | 10 sec. |
ENABLE CONDITIONS TABLE
| Parameter | Minimum | Maximum |
|---|---|---|
| Phase 1 (Fuel trim value) | ||
| Fuel system status | Closed loop mode | |
| Engine coolant | temp. 30°C (86°F) | - |
| Engine speed | 500 r/min | - |
| Engine load | No load | - |
| MAF sensor range check | Normal condition or not monitored | |
| ECT sensor range check | Normal condition or not monitored | |
| Back-up power | Normal condition or not monitored | |
| BARO sensor range check | Normal condition or not monitored | |
| Primary A/F sensor voltage | Normal condition or not monitored | |
| Fuel tank pressure sensor range check | Normal condition or not monitored | |
| TP sensor range check | Normal condition or not monitored | |
| Phase 2 (Lambda feedback status) | ||
| Engine coolant temp. | 20°C (68°F) | - |
| Intake air temp. | -10°C (14°F) | 80°C (176°F) |
| Engine load | Level load | |
| Barometric pressure | 75 kPa | - |
| Engine speed | 500 r/min | - |
| Time from engine start | 120 sec. | - |
| ECT sensor range check | Normal condition or not monitored | |
| IAT sensor range check | Normal condition or not monitored | |
| TP sensor range check | Normal condition or not monitored | |
| Secondary HO2S voltage (P0171, P0174) | 0.5 V | - |
| Secondary HO2S voltage (P0172, P0175) | - | 0.5 V |
| P2096, P2097, P2098, P2099 | ||
| Secondary O2 system status | Closed loop mode | - |
| Fuel enrichment | Not activated | - |
| Deviation between target and measured A/F | -1.7 | 1.7 |
| Engine load | 5.3 - 85.1% (according to engine speed) | - |
Typical malfunction thresholds
TYPICAL MALFUNCTION THRESHOLDS TABLE
| Phase 1 (Fuel trim value) |
| P0171, P0174 |
| Long + short term fuel trim > 27% |
| P0172, P0175 |
| Long + short term fuel trim < -29% |
TYPICAL MALFUNCTION THRESHOLDS TABLE
| Phase 2 (Lambda feedback status) |
| P0171, P0174 |
| Lambda feedback factor is sticking at lean limit. |
| P0172, P0175 |
| Lambda feedback factor is sticking at rich limit. |
| P2096, P2098 |
| Sum of correction factor for A/F sensor feedback > 600 g/min |
| P2097, P2099 |
| Sum of correction factor for A/F sensor feedback < -600 g/min |