Powertrain, generic (extended)

P2E06 Gear Lever Position Sensor B Circuit Low

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

The signal of sensor B, the redundant gear lever sensor, has dropped under its permitted minimum. Electrically that points to a short to ground in its signal line, a dead sensor or a missing feed on its own supply branch. P2E06 is not published by any manufacturer. GM catches the same condition per axis on the XT4 selector as P089C (X) and P08A1 (Y), each when the PWM duty cycle of sensor 2 stays below 5 % for three failures in four samples; Type B with a two-trip MIL. Because sensor A still delivers a full position, the driver usually notices only the warning; GM's patent lets the module carry on with the remaining valid signal. Sensor A low is P2E02, sensor B high P2E07. CARB 1968.2 (e)(15) requires such out-of-range checks.

Likely causes

Signal line of sensor B shorted to ground
Supply branch of sensor B dead
Sensor B output stuck low

Symptoms

  • Warning lamp after two trips
  • Selector keeps working on sensor A
  • Range selection lost if sensor A fails as well

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€60–900
Time0.5–3 h

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

Parts involved

gear lever position sensor bwiring harnesstcm

Related codes

P2E07P2E04P2E02P089CP08A1

References: gsi.ext.gm.com, image-ppubs.uspto.gov, law.cornell.edu.