Monitor Description
WARNING: This page is about a different car, the 2014 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
The ECM calculates the lambda (rate of excess air) based on the output voltage of the air/fuel ratio sensor. If the lambda exceeds the threshold for 10 seconds or more, the ECM determines that the air/fuel ratio sensor is stuck, and records a DTC.
MONITOR STRATEGY
| Related DTCs | P2195: Primary oxygen sensor - Output voltage out of range P2196: Primary oxygen sensor - Output voltage out of range |
| Required Sensors/Components(Main) | Air/fuel ratio sensor |
| Required Sensors/Components(Related) | Oxygen sensor |
| Frequency of Operation | Continuous |
| Duration | 10 seconds |
| MIL Operation | 2 operation cycle |
| Sequence of Operation | None |
TYPICAL ENABLING CONDITIONS
| Overlap prohibited DTC | P0030 (air/fuel ratio sensor heater) P0037, P0038 (oxygen sensor - heater) P0068, P0107, P0108 (Vacuum (MAP) sensor) P0101, P0102, P0103 (intake air flow (MAF) meter) P0111, P0112, P0113 (Intake Air Temperature (IAT) sensor) P0117, P0118 (engine coolant temperature (ECT) sensor) P0122, P0123, P0222, P0223 (Throttle position sensor) P0137, P0138 (oxygen sensor - lack of continuity in circuit) P0140 (oxygen sensor - output voltage) P0171, P0172 (fuel system feedback control) P0300, P0301, P0302, P0303, P0304 (misfire) P0458, P0459 (Solenoid bulb for the purge control) P0461, P0462, P0463 (Fuel Level sensor (FL)) P0500 (Vehicle Speed Sensor (VSS)) P0604, P0605 (ECM ROM) P1160 (throttle return spring) P2101, P2102 (Throttle actuator control motor) P2109 (Throttle position sensor minimum stop) P2119 (Throttle actuator control) P2122, P2123, P2127, P2128 (Accelerator Pedal Position Sensor (APPS) circuit) P2135 (Throttle position sensor (TPS) degree of correlation) P2138 (Accelerator pedal position sensor (APPS) degree of correlation) |
| Engine coolant temperature | 60°C {140°F} or more |
| Atmospheric pressure | 75.06 kPa (abs) {563.09 mmHg (abs), 22.169 inHg, 10.884 psi} or more |
| Battery Voltage | 10.9V or more |
| F/B operation condition (secondary) | Closed loop |
| Change in the air intake for a half engine cycle | Less than 0.02 g/rev {0.00071 oz/rev} |
| Impedance of the primary oxygen sensor | 0 to 65Ω |
| Elapsed time after starting the engine | 60 seconds or more |
| Vehicle speed | 20km/h {12 MPH} or more |
| Intake amount per second | 6 g/s or more |
| Total canister purge time after starting the engine | 19.9 seconds or more |
| EVAP density learning value during a purge | Less than 0.2 degree |
| Coefficient for load correction for the target lambda | -0.05 to 0.05 |
| When one of the following conditions is met. | A, B, or C |
| A: Output voltage for oxygen sensor - Feedback target voltage | -0.2V to 0.1V |
| B: Feedback adjustment of the oxygen sensor | Minimal limit |
| C: Feedback adjustment of the oxygen sensor | Maximum limit |