Powertrain, generic (extended)

P27E7 Transmission Range Control B Circuit/Open

Check engine lightOn
EmissionsNot relevant
Drive cycleNot required
Limp modePossible

'Transmission Range Control' belongs to shift-by-wire, where the selected range travels as an electrical signal instead of a cable. Only channel A is documented in public: Mitsubishi's 2022 manual sets P07E8 when one of eight electric shift sensors in the selector rises above 4.5 V for 2.4 s with the ignition on, and names no fail-safe reaction. A B channel, which P27E7 would cover, is not described by any manufacturer, so P27E7 is best read as the same open-circuit test on a second, redundant circuit. GM's internal range selection uses a separate set of B codes, P27EF to P27F2, for its valve position sensor. Inspect selector connector and harness; the vehicle may refuse some ranges or shift to park only.

Likely causes

Loose or corroded connector at the electric selector
Broken wire between selector and control module
Sensor inside the selector assembly failed open

Symptoms

  • Warning about the shift system in the cluster
  • Some ranges not accepted from the selector

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

transmission range control actuator bwiring harnesstcm

Related codes

P27E8P27E9P27EAP07E8P27EF

References: mitsubishitechinfo.com, mitsubishitechinfo.com, en.wikipedia.org, law.cornell.edu.