P0D6A code meaning
A/C Compressor Motor Voltage Sensor A Circuit High
Powertrain system Generic code P0Dxx codes Check engine light
What P0D6A means
P0D6A means the electric A/C compressor reports an input voltage higher than the high-voltage system can actually deliver. GM's 2011 Volt table sets it at 450 V or more (30 of 60 samples at 50 ms); the 2016 and 2019 Volt tables use more than 527.25 V, judged by the compressor itself and sent over the data bus (2019: 4 of 5 s). Both are Type B, MIL after two trips. Mitsubishi's Outlander PHEV flags it when the compressor reads above 415 V for 2 s while the battery shows 220 to 400 V; its 2019 and 2022 manuals label the code inconsistently as low and high, but the threshold is a high one. The 2023 model lights the MIL. A real overvoltage is unlikely, so the compressor's measurement or the hybrid controller is the main suspect. The low end is P0D6B, plausibility P0D69.
P0D6A at a glance
- Check engine lightYes, usually on
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyWorkshop only
- Typical labor1 to 5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of P0D6A
- Check engine light
- Air conditioning stops cooling
- Driving otherwise normal
Common causes of P0D6A
- Most likelyVoltage measurement in the compressor inverter reading too high
- PossibleElectric compressor assembly defective
- Less likelyHybrid controller or data link fault
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Ac compressor motor voltage sensor aAc compressor module
What each part of P0D6A means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 6A | The exact fault in that area. |
What to do next
- Note P0D6A 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 P0D6A
What does P0D6A mean?
P0D6A means "A/C Compressor Motor Voltage Sensor A Circuit High". P0D6A means the electric A/C compressor reports an input voltage higher than the high-voltage system can actually deliver. It is a generic code, so it means the same on every make.
Is it safe to drive with P0D6A?
Usually yes, for a short time, if the check engine light is steady and the car drives normally. If the light flashes or the car runs badly, stop and have it checked.
Will P0D6A fail an emissions test?
P0D6A 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 P0D6A to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0D6A clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.