B0642moderate severityBody
A/C Compressor Circuit
on 2014 Chevrolet Spark EV Electric Motor · FWD
What this code means
Malfunction in the A/C compressor electrical control circuit.
Symptoms
- A/C not cooling
- Compressor clutch not engaging
- Compressor clutch always engaged
- A/C system cycling abnormally
Common causes
- Faulty compressor clutch coil
- Compressor control valve failure (variable displacement)
- Wiring damage
- Ground circuit issue
- Clutch air gap incorrect
Diagnostic steps
- Test compressor clutch coil resistance
- Check clutch air gap
- Test control valve (if variable)
- Inspect wiring and ground
- Measure voltage at clutch connector
Repair notes
Replace compressor clutch coil or adjust air gap. For variable compressors, replace control valve.
🔌 Don't have a code reader?
Any of these will read and clear this code — pick by how deep you want to go.
Budget handheld (~$40)
ANCEL AD410 →
No-phone-needed handheld — reads, clears, live data, freeze frame.
Serious DIY (~$100)
BlueDriver Pro →
Enhanced codes (ABS, airbag, TPMS) plus repair reports.
Shop-grade tablet (~$300+)
Autel MaxiCOM MK808S →
Bidirectional tests, service resets, all systems.
Pro diagnostics (~$1,500+)
Autel MaxiSys MS906 Pro →
Full-system pro platform — topology mapping, ECU coding, the works.
As an Amazon Associate, OLP earns from qualifying purchases — how we link. This never changes the specs we publish.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0007
Rear Left Side Airbag Deployment Circuit
B0008
Rear Right Side Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open