P0D16Battery Charging System A High Voltage Interlock Circuit Performance
- Generic OBD-II code · Powertrain
- How the car detects it
- P0D16 flags a charging interlock loop that delivers a signal, just not the one expected – for example a reading that fails to follow when the module switches its test source on and off. No manufacturer documents P0D16 publicly. GM's Chevrolet Volt and Cadillac ELR show how such a loop is checked: the module feeds 5 V into the charging HVIL and compares the sensed level, as a share of the reference, against limits with the source on and off, which leads to P0D17 or P0D18. A Ford patent explains interlock loops built from shorting bars in connectors. Contact resistance in a connector, a plug inserted only partway and corrosion are typical. Open loops are P0D15, sporadic faults P0D19, the drive-side counterpart P0A0B. Charging is usually blocked.
- What you may notice
- Charging refused
- Charging system warning
- Likely causes
- LikelyContact resistance or corrosion in an interlock connector
- PossibleHV connector in the charging path inserted only partway
- RareFault in the module's interlock source or measuring stage
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.