What it means
An open or other circuit fault is detected in the high-voltage interlock circuit for battery charging system A. The interlock monitors continuity in the high-voltage safety circuit.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The high-voltage interlock for battery charging system A is a monitored safety loop that checks continuity through covers and connectors in the high-voltage system. P0D15 sets when the module detects an open or other circuit fault in this loop, so it may restrict charging or high-voltage operation.
Common causes
Most likely first.
- Interlock chain interrupted
- Open in interlock wire
- Pin pushed back out of connector body
Symptoms
- Charging system warning light may come on
- Charging may not start or may stop
- Vehicle may limit or disable high-voltage operation
How to diagnose it
- Read freeze-frame data and related interlock or high-voltage codes to identify when the loop lost continuity.
- Inspect only accessible interlock connectors and harness sections for a loose plug, damaged wire, or pushed-back pin; do not remove high-voltage covers.
- Check scan-tool interlock status while following the manufacturer's safe diagnostic procedure to locate where continuity is lost.
- Have the interlock wiring and connector continuity tested using the manufacturer's procedure, without bypassing the safety loop.
- If the loop wiring is intact, check the monitored module input and its connectors for a fault.
Common fixes
- Reconnect an accessible interlock connector that is loose, if the manufacturer's procedure permits.
- Repair damaged interlock wiring or replace a pushed-back terminal.
- Replace a faulty interlock component or connector identified by continuity testing.
- Repair a module input fault only after confirming the interlock loop itself is intact.
Can I keep driving?
Charging may be unavailable, and the vehicle may limit or disable high-voltage operation. Do not bypass the interlock or open high-voltage covers; if the warning persists, stop using the vehicle and arrange qualified service.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.