U0342 code meaning
Software Incompatibility With Hybrid/EV Battery Interface Control Module I
What U0342 means
Mitsubishi shows that a replaced monitoring board must first be given its place in the pack. On the 2022 Outlander plug-in hybrid, numbering of the cell monitoring units (CMU) is done at the factory; after a CMU or battery module has been replaced, the workshop runs CMU ID numbering from the battery management unit with the M.U.T.-III tester, never while the battery is charging, and checks that every ID data item reads complete, repeating the routine otherwise. The same manual names the CMU among probable causes of cell temperature faults. Mitsubishi uses no letter codes here, and the ninth position I presupposes a pack with nine boards. U01A8 is I's lost-contact code, U04A9 invalid data.
U0342 at a glance
- Check engine lightUsually not
- Emissions testCan fail
- Limp modePossible
- Repair difficultyWorkshop only
- Typical labor0.5 to 2 hours
- Clears after repairWhen cleared with a scanner
Symptoms of U0342
- Battery warning after a module or CMU replacement
- EV mode or charging restricted
- MIL possible on plug-in hybrids
Common causes of U0342
- Most likelyReplaced board not numbered or registered in the battery controller
- PossibleID numbering run while charging or aborted before completion
- Less likelyBoard of another battery variant fitted at position I
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Hv battery interface module i
What each part of U0342 means
| U | Network system: communication between the control modules (CAN bus). |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 42 | The exact fault in that area. |
What to do next
- Note U0342 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about U0342
What does U0342 mean?
U0342 means "Software Incompatibility With Hybrid/EV Battery Interface Control Module I". Mitsubishi shows that a replaced monitoring board must first be given its place in the pack. It is a generic code, so it means the same on every make.
Is it safe to drive with U0342?
Drive gently and only to a workshop. With U0342 the car can go into limp mode (reduced power) to protect itself.
Will U0342 fail an emissions test?
Yes, it can. U0342 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is U0342 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 2 hours of work. This is a job for a workshop.
Will U0342 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.