Powertrain, generic · Transmission

P070A Transmission Fluid Level Sensor Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

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. P070A is the general circuit fault of this sensor (open or fault in the signal circuit). Because the oil level does not usually affect emissions directly, a rating without the check engine light is likely; expect a transmission warning or a missing level display. An actually low oil level is not a P070A fault. Range, low, high and intermittent are P070B–P070E; fluid temperature has its own codes (P0710 ff).

Likely causes

Fluid level sensor faulty
Wire or connector to the sensor (often through the sump or transmission connector) open or oil-soaked
Transmission module input faulty

Symptoms

  • Transmission warning or 'check fluid level' message
  • Fluid level display missing
  • Usually no driveability problems

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–500
Time1–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

transmission fluid level sensorsensor wiringtransmission control module

Related codes

P070BP070CP070DP070EP0710

References: law.cornell.edu, patents.google.com.