Powertrain, generic · Transmission

P0820 Gear Lever X-Y Position Sensor Circuit

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Gear lever X and Y position sensors detect a selector's position in two directions: on an H-gate shift and select direction (a LuK patent uses two sensors about 90° apart), on a shift-by-wire lever its two axes. P0820 covers the whole X-Y circuit, P0821–P0824 and P082A–P082F sensor 1, P089A–P08A3 a redundant sensor 2. P0820 is the umbrella code: the module does not tell X from Y, or sees an invalid combination of both axes that matches no gate position. The only documented user is Mitsubishi's 2022 Outlander PHEV, which names it 'shift lever position (main) circuit malfunction' and sets it for an impossible lever position, without published thresholds. GM reads its X/Y sensors under P082A–P082F instead. Range selection may be blocked and the vehicle stays in P or N.

Likely causes

Wire or connector between selector and module open or shorted
Position sensor in the selector assembly faulty
Sensor supply (5 V reference) or ground faulty
Transmission, hybrid or selector module

Symptoms

  • Range cannot be selected or only partly
  • Vehicle stays in P or N, or limp mode
  • Transmission warning, range display flashes or missing

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–800
Time0.5–2.5 h

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

Parts involved

gear lever position sensorelectronic range selectorsensor wiringtransmission control module

Related codes

P0821P0822P082AP082DP0705

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