Hydraulic Oil Temperature Sensor Circuit Intermittent
Your transmission's oil temperature sensor is sending inconsistent signals to the engine computer, like a faulty thermometer that keeps dropping the connection. The ECU can't reliably monitor hydraulic fluid heat, which affects transmission shifting and protection.
The ECU monitors voltage signals from the hydraulic oil temperature sensor in real-time. It expects a steady analog signal that correlates to oil temperature, typically 0.5-4.5 volts. Intermittent faults occur when the signal cuts in and out, drops below minimum, or spikes unexpectedly.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor Voltage | 0.5-4.5V (correlating to -40°C to 150°C oil temp) | Signal dropouts, erratic fluctuations, or out-of-range excursions |
| Signal Continuity | Continuous stable reading | Intermittent loss of signal or noise spikes |
Code P0941 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, P0941 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.