| Fault Code Description |
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| Fault Code Conditions |
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| Fault Time Condition |
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Oxygen sensor behind catalytic converter 2, system check |
| Service Plan |
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O2 Sensor Signal Biased/Stuck Lean (Bank 2 Sensor 2) |
| Fault Impact |
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Terminal 15, engine on O2 sensor system check O2 sensor voltage too low = Signal sticks on lean Trim controller diagnosis must have been executed, see Trim controller diagnosis. Detection of faults during the trim control diagnosis triggers the active test. Engine running at idle is adequate for the active test; |
| Warnings |
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| Service Notes |
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This malfunction is detected during the active test. The active test is triggered by the trim control diagnosis function (trim controller fault code stored in the control module's fault memory!) 1. Initiate system test for reversed O2 sensors. Follow instructions for system test. 2. If the system test fails to produce a result then 3. Visual inspection of wiring and plugs 4. Electrical check of wiring 5. Replace wires or plugs as indicated 6. Check exhaust system upstream from downstream (post-cat) O2 sensor for leaks 7. Replace downstream (post-cat) O2 sensor 8. Replace upstream (pre-cat) O2 sensor 9. Replace control module |