B393B
Air Conditioning Compressor Valve Control Circuit
B393B is an OBD-II diagnostic trouble code meaning: Air Conditioning Compressor Valve Control Circuit. Common causes: open or short circuit in wiring harness, compressor solenoid valve malfunction. Estimated repair cost: $56–167.
Symptoms
- Air conditioner doesn't work
- Warm air blows from the vents
- Check Engine Light Is On
- Increased noise from the compressor
Causes
- Open or short circuit in wiring harness
- Compressor solenoid valve malfunction
- Problems with the climate control unit
- Poor contact in connectors
- Corrosion on terminals
How to Fix
- Check the integrity of the wiring harness to the compressor
- Check the resistance of the solenoid valve
- Inspect connectors for oxidation
- Check power and ground at valve connector
- Scan the control unit for other errors
- Replace solenoid valve or wiring harness if necessary
Related codes
Error B393B by Vehicle Brand
FAQ
What does the B393B code mean?
B393B is an OBD-II diagnostic trouble code that indicates: Air Conditioning Compressor Valve Control Circuit
What causes a B393B error code?
The most common causes of B393B include: Open or short circuit in wiring harness; Compressor solenoid valve malfunction; Problems with the climate control unit; Poor contact in connectors.
How do I fix a B393B diagnostic trouble code?
To fix B393B: Check the integrity of the wiring harness to the compressor. Check the resistance of the solenoid valve. Inspect connectors for oxidation. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B393B?
Yes, but get it checked soon
How much does it cost to fix B393B?
The estimated repair cost for B393B is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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