P089BGear Lever X Position Sensor 2 Circuit Range/Performance
- 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 P089B when X sensor 2 reports a lever travel outside the gate (tolerance 5.5 % of duty cycle), its frequency is faulty, or it differs from sensor 1 by more than 12 %; 3 of 4 samples every 25 ms. Type B, MIL after two trips.
- What you may notice
- MIL after two trips
- Range selection delayed or limited
- Only P available if both sensors fail
- Likely causes
- LikelySensor 2 in the selector assembly faulty or drifting
- PossibleSelector mechanism worn or bent
- PossibleLoose contact or interference on the PWM line
- RareLiquid in the console
- Repair
- Medium · Usually a job for a workshop.Typical cost: €250 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.