P089C code meaning
Gear Lever X Position Sensor 2 Circuit Low
Powertrain system Generic code P08xx codes Check engine light
What P089C means
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.
P089C at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modePossible
- Repair difficultyMedium
- Typical labor0.8 to 2 hours
- Clears after repairAfter a drive cycle
Symptoms of P089C
- MIL after two trips
- Gearbox or selector warning in the cluster
- Usually still drivable, sensor 1 takes over
Common causes of P089C
- Most likelySensor 2 signal wire shorted to ground
- PossibleSensor 2 faulty
- PossibleSupply of the selector sensor open
- Less likelyConnector corrosion from spilled drinks
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Gear lever position sensorElectronic shift moduleSensor wiringEngine control module
What each part of P089C 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. |
| 9C | The exact fault in that area. |
What to do next
- Note P089C 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 P089C
What does P089C mean?
P089C means "Gear Lever X Position Sensor 2 Circuit Low". 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. It is a generic code, so it means the same on every make.
Is it safe to drive with P089C?
Drive gently and only to a workshop. With P089C the car can go into limp mode (reduced power) to protect itself.
Will P089C fail an emissions test?
P089C 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 P089C to fix?
Difficulty: medium. A typical repair takes 0.8 to 2 hours of work. This is a job for a workshop.
Will P089C clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.