Powertrain, generic · Hybrid propulsion

P0D37 Hybrid/EV Battery System Current High

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

P0D37 records excessive current in the high-voltage battery system. Mitsubishi describes it for the 2023 Outlander PHEV: the PHEV-ECU watches the HV circuit for overcurrent whenever the car is ready or charging. Because such a current can damage the contact points of the contactors, the manual requires junction box No. 2 to be replaced, then asks whether the battery controllers, on-board charger, DC/DC converter, A/C unit, power drive unit or rear motor unit store a code, since one of them usually caused the surge; a recurring code within 20 minutes leads to the PHEV-ECU and the drive battery. Mitsubishi shows only the EV system warning, while Ford lists P0D37 with MIL and wrench lamp. Low current is P0D36; a sensor stuck high is P0AC2.

Likely causes

Short or fault in an HV component (charger, DC/DC, A/C, inverter)
Contactor points damaged by the overcurrent (junction box)
Damaged high-voltage cable
Hybrid control unit or battery fault (code returns)

Symptoms

  • EV or hybrid system warning, with MIL on some makes
  • High-voltage system switches off, car not ready or not charging

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€300–6,000
Time1–8 h

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

Parts involved

hv battery system current sensorbmshybrid control module

Related codes

P0D36P0D34P0D35P0AC2P0C78

References: mitsubishitechinfo.com, performanceparts.ford.com, mitsubishitechinfo.com.