Network, generic

U0313 Software Incompatibility With Battery Energy Control Module B

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Battery energy control module B is a second battery controller, for instance a sub-unit inside the pack that measures part of the cells for the main battery management. U0313 means the network does not accept its software or calibration. No manufacturer documents U0313 publicly. Mitsubishi's 2018 Outlander PHEV has such a pair: the main BMU expects frames from a sub-BMU and records U0112 after 0.3 s without them. Bulletin TSB-18-54-005 shows that the sub-unit's software matters on its own: a wrongly programmed sub-BMU took electrical noise for a fault in the leak detection circuit, lit several warning lamps and held the car to 60 km/h until it was reflashed. A mismatch flagged by U0313 can have similar effects: hybrid warning, MIL and limited power. U0312 covers module A, U0413 invalid data from module B.

Likely causes

Sub-module software outdated or faulty, newer level required
Module B or battery section replaced with a different variant
Main battery management updated without module B

Symptoms

  • Several warning lamps including MIL and hybrid system warning
  • Power or speed limited until the next restart
  • Electric operation or charging restricted

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€100–900
Time0.5–3 h

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

Parts involved

battery energy module bcontrol module software

Related codes

U0112U0413U0312U0335

References: static.nhtsa.gov, mitsubishitechinfo.com.