P08A3 code meaning
Gear Lever Y Position Sensor 2 Circuit Intermittent/Erratic
Powertrain system Generic code P08xx codes Check engine light
What P08A3 means
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.
P08A3 at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P08A3
- Stored fault that comes and goes, often without driver complaint
- Occasional shifter warning message
- Possibly check engine light, depending on the manufacturer
Common causes of P08A3
- Most likelyLoose or fretting contact at the selector connector
- PossibleHarness chafed by console or lever movement
- Less likelySensor 2 with intermittent internal fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gear lever y position sensor 2Wiring harnessTCM
What each part of P08A3 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 8 | Area: transmission. |
| A3 | The exact fault in that area. |
What to do next
- Note P08A3 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P08A3
What does P08A3 mean?
P08A3 means "Gear Lever Y Position Sensor 2 Circuit Intermittent/Erratic". This code covers short dropouts or jumps in the signal of the second, redundant Y-axis sensor of an electronic selector lever. It is a generic code, so it means the same on every make.
Is it safe to drive with P08A3?
Drive gently and only to a workshop. With P08A3 the car can go into limp mode (reduced power) to protect itself.
Will P08A3 fail an emissions test?
P08A3 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P08A3 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. This is a job for a workshop.
Will P08A3 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.