P0D19 code meaning
Battery Charging System A High Voltage Interlock Circuit Intermittent/Erratic
What P0D19 means
P0D19 covers a charging interlock loop that drops out and comes back, so the signal flips between valid and invalid within a short time. Loose terminals, a connector that is not fully latched, a chafing wire that only touches over bumps and vibration-sensitive solder joints are typical causes. No manufacturer documents P0D19 publicly. GM's Volt and ELR tables show the checks applied to the same loop, namely low and high limits on the sensed share of a 5 V reference, and a Ford patent explains why intermittent interlock contacts matter and how a loop can be arranged so a brief interruption does not cut propulsion. CARB requires plug-in vehicles to monitor charging components. Steady faults are P0D15–P0D18, the drive interlock intermittent code is P0A0E. Charging may stop without warning.
P0D19 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium
- Typical labor0.5 to 4 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0D19
- Charging stops unexpectedly
- Intermittent charging system warning
Common causes of P0D19
- Most likelyLoose or spread terminal in an interlock connector
- PossibleHV connector in the charging path not fully latched
- Less likelyChafed interlock wire making contact only under vibration
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Bcs a hv interlockWiring harnessOn board charger
What each part of P0D19 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 19 | The exact fault in that area. |
What to do next
- Note P0D19 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 P0D19
What does P0D19 mean?
P0D19 means "Battery Charging System A High Voltage Interlock Circuit Intermittent/Erratic". P0D19 covers a charging interlock loop that drops out and comes back, so the signal flips between valid and invalid within a short time. It is a generic code, so it means the same on every make.
Is it safe to drive with P0D19?
P0D19 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0D19 fail an emissions test?
P0D19 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 P0D19 to fix?
Difficulty: medium. A typical repair takes 0.5 to 4 hours of work. This is a job for a workshop.
Will P0D19 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.