Powertrain, generic · Transmission

P0995 Transmission Fluid Pressure Sensor/Switch F Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

The signal of pressure sensor or switch F stays high: with a normally closed switch the contacts stay open, which looks like permanent pressure, or the wire is open or shorted to voltage. No manufacturer documents this use publicly. Hyundai/Genesis bulletins 17-AT-001-G and 21-AT-016HG list P0995 in their subject lines, but their tables pair it with Auto Shift Manual Mode Circuit (SBC), and 21-AT-016HG prints the DTC as P095500; this is a misprint for P0955 and does not count as a use of P0995. GM's matching switch E code P0990 is a Special No Trip without MIL; Saab's 9-4X text treats an open and a short to voltage alike as high. CARB requires such checks on transmission inputs. P0994 is the low side.

Likely causes

Open signal wire or unplugged connector
Signal wire shorted to voltage
Switch stuck open inside the valve body module

Symptoms

  • Harsh or delayed shifts
  • Shift adaptation frozen
  • Possible limp mode

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

P0992P0993P0994P0996P0990P0955

References: law.cornell.edu, static.nhtsa.gov, static.nhtsa.gov, saabwisonline.com.