Powertrain, generic (extended)

P2795 Gear Shift Direction Circuit High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P2795 is the upper-limit fault of the shift direction signal: the value seen by the controller is higher than any real sensor position could produce. That pattern fits a signal wire touching a battery or 5 volt feed, a lost sensor ground, or an interrupted signal line on an input that is pulled up inside the module. A sensor whose output stage has failed may also report a constant high level. No manufacturer publishes set conditions for P2795; the check belongs to the range tests in CARB 13 CCR 1968.2. P2794 is the low-side twin and P2793 the plain circuit fault. When diagnosing, compare the ground drop at the sensor with the controller ground before suspecting the actuator. Until the fault is cleared the gearbox usually refuses to change gear and lights its warning lamp.

Likely causes

Signal wire shorted to battery or 5 V supply
Lost sensor ground or open signal line pulled up internally
Shift direction sensor stuck at a high output

Symptoms

  • Gear changes refused, current gear held
  • Selector or paddle inputs have no effect
  • Transmission warning lamp

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€50–900
Time0.5–3 h

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

Parts involved

shift direction sensorwiring harness

Related codes

P2793P2794P0917

References: law.cornell.edu, en.wikipedia.org.