P0D17Battery Charging System A High Voltage Interlock Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- How the car detects it
- P0D17 means the sensed voltage of the charging HVIL loop is too low. GM documents the check for the Chevrolet Volt (2011, 2014) and the Cadillac ELR: while the module sources 5 V into the loop, a sensed value under 30 % of the reference in two samples out of two at 12.5 ms sets the code as Type A, with the MIL on after one trip. A low reading suggests a path to ground or leakage somewhere in the loop wiring, or a fault in the measuring stage of the module. Because the test only runs with the source switched on, it typically shows up around charging. The interlock of battery and drive has its own code, P0A0C. P0D18 is the high counterpart, P0D15 the open loop. With an implausible loop the car refuses to charge.
- What you may notice
- Malfunction indicator lamp after one trip (GM Type A)
- Charging refused
- Likely causes
- LikelyInterlock wire chafed and touching ground
- PossibleMoisture or dirt in an interlock connector causing leakage
- RareFault in the interlock source or measuring circuit of the control module
- 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.