P08A3Gear Lever Y Position Sensor 2 Circuit Intermittent/Erratic
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- This code covers short dropouts or jumps in the signal of the second, redundant Y-axis sensor of an electronic selector lever. No manufacturer documents P08A3 publicly. GM, the only proven user of this sensor family, uses only range/performance, low and high (P08A0 to P08A2) in all OBD tables from 2016 to 2025 and catches an unsteady PWM signal through the frequency check inside P08A0. CARB 1968.2 (e)(15) requires input components to be monitored for circuit faults and plausibility. GM's patent on two redundant lever sensors explains why a second sensor exists: if one becomes invalid, the other keeps range selection alive. Expect loose contacts in the console harness; the MIL status depends on the maker.
- What you may notice
- Stored fault that comes and goes, often without driver complaint
- Occasional shifter warning message
- Possibly check engine light, depending on the manufacturer
- Likely causes
- LikelyLoose or fretting contact at the selector connector
- PossibleHarness chafed by console or lever movement
- RareSensor 2 with intermittent internal fault
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.