P0EAA code meaning
A/C Compressor Motor Voltage Sensor B Circuit High
What P0EAA means
P0EAA flags a B voltage reading at the top of, or beyond, the plausible range of the compressor supply. Since the battery cannot really deliver that much, the cause usually lies in the measurement itself: an open or shorted sense path, a failed voltage divider inside the compressor or a wrong reference. No manufacturer documents P0EAA publicly. GM's 2011 Volt judges the A channel this way (P0D6A): 440 V or more in 30 of 60 samples taken every 50 ms, Type B with MIL after two trips; a single sample at 480 V or more triggers a separate maker code. A genuinely high bus voltage would also show up in battery and inverter codes, which helps to tell the two apart. The compressor normally shuts down; the low counterpart is P0EAB.
P0EAA 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 P0EAA
- Compressor stops, cabin is not cooled
- Warning in the climate control display
Common causes of P0EAA
- Most likelyFailed voltage divider or reference in the compressor module
- PossibleSense line shorted to a higher potential
- Less likelyActual overvoltage on the high-voltage bus
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 bAc compressor moduleWiring harness
What each part of P0EAA means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| AA | The exact fault in that area. |
What to do next
- Note P0EAA 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 P0EAA
What does P0EAA mean?
P0EAA means "A/C Compressor Motor Voltage Sensor B Circuit High". P0EAA flags a B voltage reading at the top of, or beyond, the plausible range of the compressor supply. It is a generic code, so it means the same on every make.
Is it safe to drive with P0EAA?
P0EAA does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0EAA fail an emissions test?
P0EAA 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 P0EAA to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0EAA clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.