P2E02: Gear Lever Position Sensor A Circuit Low

What it means

The gear lever position sensor A reports a circuit low fault. Selector position cannot be measured reliably.

At a glance

• Usually lights the check-engine light
• The engine or gearbox may go into limp mode

How it works

Gear lever position sensor A provides the transmission control system with the selector's position. P2E02 sets when the sensor A circuit voltage is below the module's expected range, which can result from a short to ground, a poor connection, or a failed sensor. The low-circuit designation distinguishes this fault from sensor A circuit high or a signal that is merely implausible.

Common causes

Most likely first.

1. Position sensor failed
2. Wiring or connector fault
3. Connector pins corroded - high contact resistance

Symptoms

• Check-engine or transmission warning light
• Incorrect gear indication
• Difficulty selecting or engaging a gear

How to diagnose it

1. Check freeze-frame and live data for sensor A's signal and the selector position at the time of the fault, confirming that the reported circuit condition is low.
2. Inspect sensor A's connector for corrosion, moisture, pushed-back pins, or weak terminal contact, since high contact resistance can pull the signal down.
3. Trace sensor A's wiring for a short to ground, crushed insulation, or chafing, especially near the selector assembly and transmission.
4. Measure sensor A circuit power, ground, and signal with the wiring diagram, and compare results with the manufacturer's specification.
5. If the wiring and connections are sound, test sensor A through selector movement and replace it only if its output remains below specification.

Common fixes

• Clean corrosion and restore firm terminal contact at sensor A's connector.
• Repair wiring shorted to ground or damaged insulation in sensor A's circuit.
• Secure a loose connector and correct any poor ground or supply connection.
• Replace gear lever position sensor A if its output remains low with a verified circuit.

Can I keep driving?

Avoid driving if the gear indication is wrong or the transmission cannot reliably engage the selected position; the low signal can cause restricted operation or unexpected gear recognition. Have the circuit checked promptly, and do not drive when the actual gear is uncertain.