Powertrain, generic (extended)

P2E87 Proximity Detection Circuit B

Check engine lightUsually off
EmissionsNot relevant
Drive cycleNot required
Limp modeNo

P2E87 is the general fault of a second plug-detection circuit, B, whose job is to tell the vehicle that a connector is seated in an inlet. Under SAE J1772 this proximity pin is tied to earth through resistors and a switch in the latch button, so the car can lock out driving and wind down current before the plug comes out; CHAdeMO inlets have their own proximity contact for the same interlock. A second circuit is needed where a car carries two inlets, as the Outlander PHEV does with its normal and quick-charge sockets: Mitsubishi reports the normal one as proximity A (P0D58/P0D59) and reads a separate quick-charger connecting voltage, without publishing a B code. No manufacturer documents P2E87. Lear patented a circuit that also wakes the charger through this line. Expect no charging on that inlet.

Likely causes

Damaged or corroded proximity contact in inlet B
Open or poorly seated connector between inlet B and the controller
Faulty charging cable or plug resistor
Evaluation circuit in the charger or control unit faulty

Symptoms

  • No charging through the affected inlet
  • Plug not recognised or vehicle reports a cable while none is fitted
  • Vehicle may refuse to enter drive readiness

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–1,200
Time0.5–3 h

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

Parts involved

proximity detection bcharge inlet bwiring harness

Related codes

P2E88P2E89P2E8AP2E8BP0D56

References: en.wikipedia.org, en.wikipedia.org, mitsubishitechinfo.com, image-ppubs.uspto.gov.