P0D68 code meaning
A/C Compressor Motor Voltage Sensor A Circuit
What P0D68 means
An electric A/C compressor in a hybrid or EV runs its motor from the high-voltage battery through an inverter in the compressor housing, and a sensor there measures the incoming high voltage. P0D68 is the general circuit code for that sensor: its signal is missing or unusable as a whole, without a specific low or high reading. No manufacturer documents P0D68 publicly. GM (Volt) and Mitsubishi (Outlander PHEV) monitor the same sensor but use P0D69 for plausibility against the battery voltage and P0D6A/P0D6B for out-of-range values. CARB requires electronic A/C components to be monitored where they affect engine control or other diagnostics. In practice the compressor controller stops the compressor when it cannot trust its input voltage, so cabin cooling and any refrigerant-based battery cooling are lost.
P0D68 at a glance
- Check engine lightUsually not
- 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 P0D68
- Air conditioning does not cool
- Warning message or warning light, depending on the vehicle
- Battery cooling via refrigerant may be limited
Common causes of P0D68
- Most likelyVoltage measurement inside the electric compressor's inverter failed
- PossibleCompressor reports its sensor value over a faulty data link
- Less likelyPoor high-voltage connection at the compressor
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 P0D68 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 68 | The exact fault in that area. |
What to do next
- Note P0D68 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 P0D68
What does P0D68 mean?
P0D68 means "A/C Compressor Motor Voltage Sensor A Circuit". An electric A/C compressor in a hybrid or EV runs its motor from the high-voltage battery through an inverter in the compressor housing, and a sensor there measures the incoming high voltage. It is a generic code, so it means the same on every make.
Is it safe to drive with P0D68?
P0D68 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0D68 fail an emissions test?
P0D68 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 P0D68 to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0D68 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.