Faulty gear lever Y position sensor 2.; Damaged or corroded wiring harness or connector at the sensor.; Open or short circuit in the sensor signal or ground circuit.; Poor electrical connection at the PCM or transmission control module.; Mechanical binding or misalignment of the gear lever mechanism affecting sensor reading.; Water intrusion or debris in the sensor connector.; Internal PCM fault (rare).

DTC codes / P08xx · Transmission / P089F

P089FGear Lever Y Position Sensor 2 Circuit

Q: What does code P089F mean?

Gear Lever Y Position Sensor 2 Circuit. P089F indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit for the gear lever Y position sensor 2, which is a secondary sensor used to confirm the gear selector's vertical position. The PCM compares this signal with other range sensors and sets the code when the voltage or rationality check falls outside the expected range.

P089F indicates that the powertrain control module (PCM) has detected an abnormal condition in the electrical circuit for the gear lever Y position sensor 2, which is a secondary sensor used to confirm the gear selector's vertical position. The PCM compares this signal with other range sensors and sets the code when the voltage or rationality check falls outside the expected range.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Symptoms you may notice

Illumination of the check engine light or service engine soon light.
Gear position indicator on the instrument cluster may flash or show incorrect gear.
Transmission may default to a limp mode, limiting gear selection or shift quality.
Difficulty moving the gear lever or unexpected engagement of gears.
Often no symptoms besides the warning light, especially if the fault is intermittent.

Common causes, most likely first

Faulty gear lever Y position sensor 2.
Damaged or corroded wiring harness or connector at the sensor.
Open or short circuit in the sensor signal or ground circuit.
Poor electrical connection at the PCM or transmission control module.
Mechanical binding or misalignment of the gear lever mechanism affecting sensor reading.
Water intrusion or debris in the sensor connector.
Internal PCM fault (rare).

How to diagnose and fix it

Connect an OBD-II scanner and verify P089F is the only stored code; check for related codes in other modules.
Inspect the sensor connector and wiring for corrosion, damage, or loose pins; repair as needed.
Measure reference voltage and ground at the sensor connector with the key on, engine off; compare to manufacturer specifications.
Test the sensor signal voltage while moving the gear lever through its range; look for smooth variation without drops or spikes.
If the signal is erratic or out of range, replace the gear lever Y position sensor 2.
Clear codes and perform a road test to verify the repair; recheck for pending codes.
If the code persists, check continuity between the sensor and PCM, and inspect the PCM connector for corrosion or damage.

Before replacing the gear position sensor

A loose or corroded connector at the sensor is a frequent cause that mimics a failed sensor, so always inspect and clean terminals first.
The gear lever Y position sensor 2 is often a redundant sensor; a failure may not cause drivability issues but can affect shift quality or disable certain features.
Aftermarket scan tools may misreport this code if they do not support the vehicle's specific transmission protocol; use a factory-level tool for accurate diagnosis.
Mechanical wear in the gear selector mechanism can cause the sensor to read out of range even when the sensor itself is good.
This code can be set by a low battery or charging system issue that causes voltage spikes; check battery health and grounds before condemning the sensor.

Can I keep driving with P089F?

If the vehicle drives normally and the gear indicator is accurate, you can drive cautiously to a repair shop, but avoid aggressive acceleration or towing. If the transmission is in limp mode or gear selection is erratic, stop driving and have the vehicle towed to prevent damage.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.