Powertrain, generic · Transmission

P075F Transmission Fluid Level Too High

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P075F is not a circuit fault but a condition: a working fluid level sensor reports a level above the target band – the counterpart of P070F. In the Allison patent the transmission module reports 'too high, drain a quart or more', measuring only with the vehicle at rest, warm fluid and low input speed. No manufacturer document available to us uses this code. Overfilling makes rotating parts churn the fluid, which foams, pressure control becomes unsteady, fluid escapes at the vent and temperature rises; an FCA bulletin traces poor shifting after repairs to overfilling. Automatic transmission fluid level depends strongly on temperature – topping up cold often overfills.

Likely causes

Overfilled at fluid change or repair (wrong check temperature or procedure)
Level sensor drifting (reads too high)
Measured under poor conditions (slope, cold fluid)

Symptoms

  • Transmission fluid level warning
  • Fluid escaping at the transmission vent
  • Foaming fluid, unsteady or harsh shifts
  • Transmission overheating

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€30–300
Time0.3–1.5 h

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

Parts involved

transmission fluidtransmission fluid level sensortransmission control module

Related codes

P070FP070AP070BP0218

References: patents.google.com, static.nhtsa.gov, law.cornell.edu.