P0E2DInternal Control Module Hybrid/EV Battery Monitor Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0E2D is an internal self-test result of the module that supervises the high-voltage pack: the part that measures cell voltages, usually a dedicated monitor chip with its own converter and reference, does not behave as expected. It casts doubt on the measurement itself, not on a cell. Battery monitor patents such as Renesas US9735567B2 show the kind of checks involved, for example self-diagnosis of the A/D converter, detection of a broken sense line between cell and chip, or a second, simpler fault monitor. No manufacturer document on an official server explains P0E2D. CARB requires computers and hybrid components feeding the drive to be monitored. Without trusted cell voltages the pack cannot be shielded from over- or undercharge, so power is limited or the car will not get ready.
- What you may notice
- Hybrid or EV system warning and MIL on
- Reduced power or vehicle not ready to drive
- Likely causes
- LikelyCell monitoring circuit in the battery control module faulty
- PossibleSoftware error in the battery control module
- RareInterrupted cell voltage sense line
- 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 – €3,000
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.