P0EAB code meaning
A/C Compressor Motor Voltage Sensor B Circuit Low
What P0EAB means
P0EAB is set when the B voltage channel of the electric A/C compressor reports far less than the high-voltage battery actually supplies while the contactors are closed. Typical reasons are a sense line shorted to ground, a broken internal connection or a sensing stage without supply; a supply interrupted upstream, for instance by a high-voltage fuse, produces the same picture and should be ruled out first. No manufacturer documents P0EAB publicly. For the A channel (P0D6B), GM's 2011 Volt uses 190 V or less in 30 of 60 samples, contactors closed and no faults present, Type B. CARB calls for range checks of such inputs where hybrid cooling depends on them. The air conditioning, and possibly battery cooling, fails; the high counterpart is P0EAA.
P0EAB 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 P0EAB
- No cooling from the air conditioning
- Charging power may be reduced if the battery cannot be cooled
Common causes of P0EAB
- Most likelyVoltage sense line shorted to ground
- PossibleHigh-voltage supply to the compressor interrupted (fuse, connector)
- Less likelyMeasuring stage in the compressor module without supply
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 P0EAB means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| AB | The exact fault in that area. |
What to do next
- Note P0EAB 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 P0EAB
What does P0EAB mean?
P0EAB means "A/C Compressor Motor Voltage Sensor B Circuit Low". P0EAB is set when the B voltage channel of the electric A/C compressor reports far less than the high-voltage battery actually supplies while the contactors are closed. It is a generic code, so it means the same on every make.
Is it safe to drive with P0EAB?
P0EAB does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will P0EAB fail an emissions test?
P0EAB 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 P0EAB to fix?
Difficulty: workshop only. A typical repair takes 1 to 5 hours of work. This is a job for a workshop.
Will P0EAB clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.