P2E39Battery Charger B Fuse
- Generic OBD-II code · Powertrain
- How the car detects it
- P2E39 concerns the high-voltage fuse in the branch between the traction battery and charger B. Battery management units usually judge such fuses by comparing the voltage behind the fuse with the pack voltage; Volvo's technical journal TJ 37376 on BECM codes P0A9500 and P0E2F00 has technicians read exactly those values at the fuse outputs. No manufacturer documents P2E39 publicly. For the A-side code P0E2E00 Audi describes a 2022 Q5 plug-in hybrid case: the J840 battery regulation module logs it intermittently after very dynamic cornering through a diagnostic irregularity, replacing the switching unit does not help, a software update does. A really blown charger B fuse stops charging through that path. Other HV fuses are P0A95 and P0E2F, the A twin P0E2E.
- What you may notice
- Charging through charger B no longer possible
- Electrical system or high-voltage warning
- Likely causes
- PossibleFuse opened by an internal short in charger B
- PossibleSpurious entry from battery management software
- RareFaulty voltage sensing behind the fuse
- 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.