Metering Oil Pump Stepping Motor Circuit Malfunction
The metering oil pump stepping motor isn't responding correctly to engine control commands, similar to a fuel injector that won't open and close properly. This affects engine oil delivery timing in two-stroke or special diesel engines.
The ECM sends electrical pulses to the metering oil pump stepper motor to regulate oil injection timing based on engine speed and load. It monitors the motor's response through feedback signals and detects open circuits, shorts, or lack of motor movement.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Stepper Motor Coil Resistance | 5-15 ohms per coil | Open circuit or >50 ohms |
| Motor Response Time | Motor advances/retreats within 500ms | No detectable movement or timeout >1000ms |
Code P1692 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P1692 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.