P0A11DC/DC Converter Enable Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Can trigger limp mode
- How the car detects it
- General or open-circuit fault on the enable line with which the hybrid or battery control module tells the DC/DC converter that it may deliver power to the 12 V system. In typical designs a high enable level permits converter output, and a CAN message carries the same permission in parallel, so the two can be cross-checked. If the line is open, the converter cannot be switched on reliably and the 12 V battery is no longer charged. No manufacturer documents P0A11 publicly in an official source; Honda's hybrid recall shows what follows when the converter shuts down: charging warning, discharged 12 V battery, possible loss of drive. Low and high faults on the same line are P0A12 and P0A13; status line faults are P0A08 to P0A10.
- What you may notice
- Battery or charging warning light on
- 12 V battery is not charged and runs down
- Vehicle may lose motive power after a while
- Likely causes
- LikelyBroken enable wire or unplugged connector between control module and converter
- PossibleCorroded or pushed-out terminal at the converter enable pin
- RareFaulty enable output driver in the control module
- RareFaulty enable input inside the DC/DC converter
- Repair
- Medium · Usually a job for a workshop.Typical cost: €80 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.