What it means
The internal control module of an electrically driven A/C compressor (typical on hybrid and BEV vehicles) reports an internal performance fault. Compressor capacity may be reduced or shut down.
At a glance
- Usually lights the check-engine light
How it works
An electrically driven A/C compressor contains control electronics that manage compressor operation, commonly on hybrid and battery electric vehicles. This code sets when the compressor's internal module reports that its control performance is outside expectations, which can reduce or stop cooling and may trigger related module faults.
Common causes
Most likely first.
- Internal fault in compressor inverter electronics
- Software error in compressor control logic
- Module software outdated, reflash may resolve
Symptoms
- Check engine light on
- Possible limp mode or no-start
- Multiple follow-up faults across modules
- Reset/relearn may be needed after repair
How to diagnose it
- Record freeze-frame data and scan all modules for related faults before clearing codes, since compressor control faults can create follow-up messages elsewhere.
- Check live data for compressor requests, operating status, and reported faults to determine whether the internal module is limiting or stopping the compressor.
- Inspect the compressor's external connectors and harness for damage or corrosion, following the manufacturer's high-voltage safety procedure.
- Check whether a software update or calibration for the compressor control system is specified for the vehicle.
- If wiring and software are addressed but the internal performance fault returns, test the compressor assembly and its control system using the manufacturer's procedure.
Common fixes
- Repair damaged or corroded external compressor wiring or connections.
- Apply the applicable manufacturer software update or calibration if one is specified.
- Replace the compressor assembly if its internal control electronics fail the manufacturer's diagnostic procedure.
- Perform any required reset or relearn after the repair.
Can I keep driving?
If the vehicle drives normally and no high-voltage, powertrain, or temperature warning appears, driving may be possible, but A/C cooling can be reduced or unavailable. If a no-start, limp mode, or multiple system warnings occur, stop when safe and arrange diagnosis; do not handle high-voltage compressor wiring.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.