P08A5Gear Lever Y Position Sensor 1/2 Correlation
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- P08A5 is the Y-axis twin of P08A4: the two redundant sensors that measure the selector lever's Y travel disagree beyond a calibrated limit. No manufacturer documents P08A5 publicly. In GM's electronic range selection the same check exists but is reported as range/performance: P08A0 sets when Y sensor 2 and Y sensor 1 differ by more than 12 % duty cycle, Type B. GM's patents show why redundancy matters: a disagreeing pair is resolved by trusting the more fault-tolerant signal, and if that is not possible the module selects neutral or park. CARB 1968.2 (e)(15) requires such rationality checks for inputs. For the driver this means a refused or held range; repairs usually replace the selector assembly.
- What you may notice
- Shifter warning message
- Range selection refused or vehicle held in neutral or park
- Check engine light, depending on the manufacturer
- Likely causes
- LikelyOne of the two Y sensors drifting
- PossibleMagnet carrier or lever mechanism shifted or worn
- PossibleContact resistance on one sensor's signal path
- Repair
- Medium · Usually a job for a workshop.Typical cost: €150 – €1,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.