Powertrain, generic · Transmission

P070D Transmission Fluid Level Sensor Circuit High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

Fluid level sensors in the transmission sump report the oil level to the transmission module as a voltage; an Allison patent converts it to millimetres and only accepts readings with the vehicle at rest, warm fluid, 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. P070D means the sensor signal is above its upper limit – typically an open signal or ground wire, pulled up inside the module, or a short to positive. 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. The opposite fault is P070C.

Likely causes

Wire or connector to the level sensor open
Sensor faulty (open)
Signal wire shorted to positive
Control module faulty

Symptoms

  • Fluid level display missing or warning to check transmission fluid
  • Usually no driveability problems
  • Transmission warning lamp depending on manufacturer

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

P070AP070BP070CP070EP070F

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