U0313Software Incompatibility With Battery Energy Control Module B
- Generic OBD-II code · Network
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- 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.
- What you may notice
- Several warning lamps including MIL and hybrid system warning
- Power or speed limited until the next restart
- Electric operation or charging restricted
- Likely causes
- LikelySub-module software outdated or faulty, newer level required
- PossibleModule B or battery section replaced with a different variant
- PossibleMain battery management updated without module B
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Workshop only · Usually a job for a workshop.Typical cost: €100 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.