Code Enable Criteria
WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2001 Saturn SW2, 2001 Saturn SL2, 2001 Saturn SL1, 2001 Saturn SL, and 2001 Saturn SC2. However, it is still accessible from the selected car via links, so may be relevant.
- Engine speed is less than 3200 RPM.
- Start-up ECT is 39-174°F (4-79°C).
- O2S1 is greater than 600 millivolts for greater than 2 seconds.
- IAT is greater than 32°F (0°C).
- MAP is greater than 20 kPa.
- Ignition voltage is 11-18 volts.
- Traction control is not active.
- Command air/fuel ratio is 12-14:1.
- Calculated airflow is 8-19 grams/second.
- No 5-volt reference, ECT, EGR, fuel trim, IAC, IAT, MAP, misfire, O2S1 or TP sensor DTCs are set.
DTC sets when AIR system is being commanded on during a cold start and O2S1 signal does not indicate a lean condition (voltage less than 300 millivolts) for a minimum of 2.5 seconds out of a 10 second test.
On vehicles built after VIN 1Z200000, if air pump does not run long enough to obtain accurate test results, PCM may run up to 5 independent tests if a test fails or does not fully run. PCM must see O2S1 voltage go less than 300 millivolts for at least 1.5 seconds out of a maximum 6 second test. PCM will wait 20 seconds between each test if another test is going to run.
To run active test:
- ECT is greater than 167°F (75°C).
- Commanded air/fuel ratio is 14.7:1.
- Engine is at idle for at least 4 seconds.
- Short Term Fuel Trim (STFT) is 122-134.