P2DB6Battery Charger B Cooling System Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- P2DB6 is set when the cooling of a second on-board charger, charger B, cannot hold the unit inside its permitted temperature window, so the charger has to cut its power or stop. No manufacturer documents P2DB6 publicly. Mercedes shows the A-side case P0D8F on the AMG GLE 53 Hybrid (LI47.70-P-079963): AC charging ended after about 15 minutes because the low-temperature coolant lines of charger and power electronics had been connected the wrong way round, and the charger's two coolant temperature sensors also disagreed. CARB requires plug-in hybrids to flag charger faults that stop charging or slow it down. A charger B temperature beyond its limit is reported separately as P0E85. For the driver, plug-in charging becomes slow or aborts.
- What you may notice
- Charging power reduced at the charge station
- Plug-in charging stops after some minutes
- Charging fault message in the instrument cluster
- Likely causes
- LikelyLow coolant level or trapped air in the charger cooling circuit
- PossibleElectric coolant pump of the low-temperature circuit weak or failed
- RareCoolant hoses connected to the wrong circuit after assembly or repair
- RareLow-temperature radiator clogged or its airflow obstructed
- Repair
- Medium · Usually a job for a workshop.Typical cost: €60 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.