P070BTransmission Fluid Level Sensor Circuit Range/Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- Fluid level sensors in the transmission sump (capacitive or voltage-based) report the oil level to the transmission module; measurements are only valid under defined conditions – an Allison patent names fluid temperature, vehicle at rest, low input speed and a tilt correction. Such sensors are mainly found in heavy automatic transmissions. No manufacturer document available to us uses this code. P070B means the signal is present but implausible – it does not change, does not fit temperature or operating state, or lies outside the physically possible range. Such checks only make sense within the valid measuring window. A truly wrong oil level (overfilled, underfilled) or the wrong fluid can also appear as an implausible signal. The circuit fault is P070A.
- What you may notice
- Warning or message about transmission fluid level
- Fluid level display implausible or unavailable
- Usually no driveability problems
- Likely causes
- LikelyFluid level sensor drifting or dirty (wear debris, sludge)
- PossibleFluid level actually wrong (over- or underfilled) or wrong fluid
- PossibleContact resistance in connector or wire
- RareFaulty tilt or temperature compensation (fluid temperature sensor fault)
- Repair
- Medium · Usually a job for a workshop.Typical cost: €100 – €500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.