Powertrain, generic · Transmission
P0824 Gear Lever Y Position Sensor 1 Circuit Intermittent/Erratic
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. P0824 is the same for the Y axis: short dropouts or jumps of Y sensor 1. GM folds Y-axis disturbances into P082D; thresholds for P0824 are not published anywhere. The symptoms are an occasional warning, a gate change that is sometimes not recognized, and occasional limp mode.
Likely causes
Loose contact at the selector connector
Chafed or broken wire in the harness to the console
Sensor worn (potentiometer track) or Hall sensor disturbed
Interference or ground fault
Symptoms
- Occasional transmission warning
- Gate change occasionally not recognized
- Occasional limp mode
Repair estimate
DifficultyMediumWorkshop job
Parts and labour€50–800
Time0.5–3 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
References: gsi.ext.gm.com, patents.google.com, law.cornell.edu.