The controller reached a calibrated positive fuel correction because feedback indicated a lean condition on bank 1.
Why this matters
A trouble code reports a monitored result. It narrows the system and test conditions, but it rarely names the failed part by itself.
Evidence to capture first
- Freeze-frame rpm, load, trims, airflow, and pressure
- Trim change from idle to steady raised rpm
- Unmetered air, exhaust leaks ahead of the sensor, delivery pressure, and sensor plausibility
A disciplined path
- Confirm the code and operating region
- Use trim behavior to choose an air-leak, airflow, delivery, or feedback test
- Measure the suspected fault directly
- Reset learned values only when the repair procedure requires it and then verify
Decision point
The repair is supported when the failed circuit, mechanical condition, or monitored response is measured and the original monitor can run without the fault returning.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.
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