P2692 — Cylinder 7 - Injector data incompatible

Diagnostic algorithm

1. Retrieve all stored DTCs and freeze-frame data. Note conditions when code set (rpm, load, temp).
2. Clear codes and attempt to re-create the fault while monitoring live PIDs: injector pulse width, injector trims, misfire counters and fuel pressure.
3. Visually inspect the injector 7 connector, pins and wiring for corrosion, bent pins, heat damage or looseness. Repair as needed.
4. Measure injector 7 coil resistance with a multimeter and compare to specifications. If out of range, replace injector.
5. Use an oscilloscope to view injector 7 waveform while cranking/running. Compare waveform shape and timing to a known-good cylinder. Look for open/short, excessive noise, or driver anomalies.
6. Swap injector 7 with another cylinder’s injector (if practical) and see if the code or misfire follows the injector or remains on cylinder 7. This helps differentiate wiring/ECU vs injector.
7. Check wiring continuity and resistance between injector connector and ECM injector driver pin. Repair any faults.
8. Verify fuel rail pressure and regulator operation. Low/unstable pressure can alter injector behavior and cause incompatibility detection.
9. Confirm cam/crank timing is correct (timing belt/chain condition, sensor signals). Cylinder identification errors can produce incompatible injector data.
10. Check ECU software/calibration and injector coding using manufacturer diagnostic tool. Re-flash or update ECM software and correct injector configuration if required.
11. If wiring and injector check good but fault persists, test or replace the ECM injector driver circuit or the ECM per manufacturer procedures.
12. After repairs, clear codes and road-test. Re-check for reappearance of P2692 and verify normal engine performance.