P0E85 code meaning
Battery Charger B Temperature Too High
What P0E85 means
P0E85 reports that the second charger stage or second on-board charger, labelled B, has become hotter than its own protection limit allows. Like the A counterpart P0D24, it is a heat verdict, not a sensor fault: the charger trusts its reading and cuts back power or stops to save its semiconductors. No manufacturer documents P0E85 with set conditions in public sources. Toyota shows that the letter B is real hardware: the 6.6 kW charger of the RAV4 Prime logs its input current fault as charger B (P0E89). CARB asks plug-in hybrids to flag charger failures that stop charging or reduce its rate. Typical triggers are poor coolant flow or air flow, a clogged heat exchanger or an internal defect. Expect slow or aborted AC charging, not loss of drive.
P0E85 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor0.5 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0E85
- AC charging slows down noticeably or stops before the battery is full
- Charging fault message or flashing charge-port indicator
Common causes of P0E85
- Most likelyToo little coolant or air flow through charger B (low coolant, pump, blocked fins)
- PossibleInternal defect in the power stage of charger B
- Less likelyLong full-power charging in very hot surroundings
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Battery charger bBattery charger b coolingOn board charger
What each part of P0E85 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 85 | The exact fault in that area. |
What to do next
- Note P0E85 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 P0E85
What does P0E85 mean?
P0E85 means "Battery Charger B Temperature Too High". P0E85 reports that the second charger stage or second on-board charger, labelled B, has become hotter than its own protection limit allows. It is a generic code, so it means the same on every make.
Is it safe to drive with P0E85?
P0E85 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0E85 fail an emissions test?
P0E85 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is P0E85 to fix?
Difficulty: workshop only. A typical repair takes 0.5 to 5 hours of work. This is a job for a workshop.
Will P0E85 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.