Powertrain, generic (extended)

P2E04 Gear Lever Position Sensor B Circuit

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

Sensor B is the second, redundant gear lever position sensor; it measures the same lever travel as sensor A so that a single failure does not leave the driver without range selection. Toyota names it gear lever position sensor B in the floor shift assembly of the Lexus NX, and GM's tables call the equivalent device sensor 2, with X and Y values of its own (P089B to P08A2). P2E04 is the general circuit fault of sensor B, set when its line is open or its signal cannot be read, with no low/high distinction. No maker documents P2E04 itself. GM's patent US9249877 describes the logic behind the pair: if a coordinate of one sensor fails its test, that sensor is ignored and the other decides. A fault here therefore removes the backup, not the function.

Likely causes

Connector or wire of sensor B at the selector loose or damaged
Sensor B in the selector assembly failed
Separate supply branch of sensor B interrupted

Symptoms

  • Warning lamp or shift-system message
  • Selector works normally on sensor A alone
  • Any further sensor fault can block range changes

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–900
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

P2E05P2E06P2E07P2E00P089A

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