Fault Family System: Powertrain (P-Codes) 25 SAE Codes

Gear Lever Position Sensor Circuit

Diagnostic & Technical Explanation

Code P0820 (Gear Lever X-Y Position Sensor Circuit) sets when the shift-by-wire module sees an open, shorted, or implausible signal from a gear lever's X/Y (two-axis) position sensor, a mismatch between redundant sensors on either axis, or an implausible push-pull shift-anticipate switch signal. Causes are sensor wear inside the shifter assembly, a lost calibration after service, or chafed wiring at the console.

These 25 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 25 times.

Codes in this family (25)

Code	Definition	Repair coverage
P0820	Gear Lever X-Y Position Sensor Circuit	3 ranked fixes
P0821	Gear Lever X Position Sensor 1 Circuit	3 ranked fixes
P0822	Gear Lever Y Position Sensor 1 Circuit	3 ranked fixes
P0823	Gear Lever X Position Sensor 1 Circuit Intermittent/Erratic	3 ranked fixes
P0824	Gear Lever Y Position Sensor 1 Circuit Intermittent/Erratic	3 ranked fixes
P0825	Gear Lever Push-Pull Switch (Shift Anticipate)	3 ranked fixes
P082A	Gear Lever X Position Sensor 1 Circuit Range/Performance	3 ranked fixes
P082B	Gear Lever X Position Sensor 1 Circuit Low	3 ranked fixes
P082C	Gear Lever X Position Sensor 1 Circuit High	3 ranked fixes
P082D	Gear Lever Y Position Sensor 1 Circuit Range/Performance	3 ranked fixes
P082E	Gear Lever Y Position Sensor 1 Circuit Low	3 ranked fixes
P082F	Gear Lever Y Position Sensor 1 Circuit High	3 ranked fixes
P089A	Gear Lever X Position Sensor 2 Circuit	3 ranked fixes
P089B	Gear Lever X Position Sensor 2 Circuit Range/Performance	3 ranked fixes
P089C	Gear Lever X Position Sensor 2 Circuit Low	3 ranked fixes
P089D	Gear Lever X Position Sensor 2 Circuit High	3 ranked fixes
P089E	Gear Lever X Position Sensor 2 Circuit Intermittent/Erratic	3 ranked fixes
P089F	Gear Lever Y Position Sensor 2 Circuit	3 ranked fixes
P08A0	Gear Lever Y Position Sensor 2 Circuit Range/Performance	3 ranked fixes
P08A1	Gear Lever Y Position Sensor 2 Circuit Low	3 ranked fixes
P08A2	Gear Lever Y Position Sensor 2 Circuit High	3 ranked fixes
P08A3	Gear Lever Y Position Sensor 2 Circuit Intermittent/Erratic	3 ranked fixes
P08A4	Gear Lever X Position Sensor 1/2 Correlation	3 ranked fixes
P08A5	Gear Lever Y Position Sensor 1/2 Correlation	3 ranked fixes
P08A6	Gear Lever Position Sensor System - Multiple Sensor Correlation	3 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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