Powertrain, generic · Transmission

P0996 Transmission Fluid Pressure Sensor/Switch F Circuit Intermittent

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

The signal of pressure sensor or switch F drops out or flickers for short moments without staying low or high. No manufacturer documents this code publicly, and no transmission with a sixth pressure switch was found: GM's six-speeds end at switch 5 (E), Mitsubishi's 2019 six-speed uses letters B, D and E. Because such switches are thin film-and-piston units inside the valve body module, as Sonnax shows, debris or a delaminated film can make the contact chatter, and connector or harness faults do the same electrically. CARB requires transmission inputs to be checked for circuit faults; an intermittent code is the slot for faults too short to set P0994 or P0995. Expect occasional rough shifts, often without a warning light.

Likely causes

Loose or corroded connector contact
Debris or delaminated film making the switch chatter
Chafed harness shorting or opening under vibration

Symptoms

  • Stored fault, often without warning light
  • Occasional rough or flared shift

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time1–5 h

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

Parts involved

tfp sensor fwiring harnesstcm

Related codes

P0992P0993P0994P0995P0991

References: law.cornell.edu, sonnax.com, mitsubishitechinfo.com.