Powertrain, generic (extended)

P2E13 Gear Selection Actuator Position Sensor Circuit High

Check engine lightOn

EmissionsRelevant

Drive cycleNot required

Limp modePossible

P2E13 is the opposite case to P2E12: the position signal of the gear selection actuator sits above its highest plausible value. A short between the signal line and a supply wire is the classic cause; an open ground or, on pull-up inputs, a broken signal wire produce the same picture. No manufacturer documents P2E13 publicly. GM's 2023 TCM tables for a dual-clutch gearbox treat the high fault of a rod position sensor (P2834) as missing pulses with the pin above 3500 mV, or a duty cycle above 92 %, judged for 150 ms and only with valid sensor supply and battery voltage, Type A. CARB requires such out-of-range tests on transmission sensors. Measuring the line with the sensor unplugged separates a harness short from a sensor defect. The gearbox then normally stops shifting or keeps a fixed gear.

Likely causes

Signal wire shorted to a supply or 5 V reference line

Sensor ground open or high resistance

Position sensor faulty, output stuck high

Moisture in the actuator connector bridging pins

Symptoms

MIL and transmission warning
Gearbox stays in one gear or in neutral
Shift lever input ignored

Repair estimate

DifficultyHardWorkshop job

Parts and labour€80–1,500

Time0.5–4 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

gear selection actuator position sensorwiring harnesstcm

References: gsi.ext.gm.com, law.cornell.edu.