P089CGear Lever X Position Sensor 2 Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Gear lever position sensor 2 is the redundant second sensor of an electronic selector lever, next to sensor 1 (P0821 ff), for the X or Y axis. The only documented user is GM's electronic range selection with PWM Hall sensors, as in the Cadillac XT4, and only for range, low and high. Following GM's patent, an invalid sensor is dropped and the other carries on; with both invalid the module can request park. GM sets P089C when the duty cycle of X sensor 2 falls below 17 % (2019) or 5 % (XT4 and 2025): signal wire to ground, sensor without output or missing supply. Type B, MIL after two trips; sensor 1 carries on.
- What you may notice
- MIL after two trips
- Gearbox or selector warning in the cluster
- Usually still drivable, sensor 1 takes over
- Likely causes
- LikelySensor 2 signal wire shorted to ground
- PossibleSensor 2 faulty
- PossibleSupply of the selector sensor open
- RareConnector corrosion from spilled drinks
- Repair
- Medium · Usually a job for a workshop.Typical cost: €200 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.