B27B1
Electric Compressor Low Voltage
B27B1 is an OBD-II diagnostic trouble code meaning: Electric Compressor Low Voltage. Common causes: damage to the wiring harness to the compressor, electric compressor malfunction. Estimated repair cost: $111–556.
Symptoms
- Air conditioning/heating system failure
- Reduced performance of the climate system
- Dashboard warnings
- Battery overheating (in electric vehicles)
Causes
- Damage to the wiring harness to the compressor
- Electric compressor malfunction
- Relay or fuse problems
- HVAC control module malfunction
- Corrosion or poor contacts in connectors
- Problems with the battery or charging system
How to Fix
- Check the voltage at the compressor terminals with the system on
- Inspect the wiring harness for damage
- Check the condition of fuses and relays
- Test the resistance of the compressor windings
- Check connectors for corrosion and contact quality
- Scan the HVAC module for additional errors
Related codes
FAQ
What does the B27B1 code mean?
B27B1 is an OBD-II diagnostic trouble code that indicates: Electric Compressor Low Voltage
What causes a B27B1 error code?
The most common causes of B27B1 include: Damage to the wiring harness to the compressor; Electric compressor malfunction; Relay or fuse problems; HVAC control module malfunction.
How do I fix a B27B1 diagnostic trouble code?
To fix B27B1: Check the voltage at the compressor terminals with the system on. Inspect the wiring harness for damage. Check the condition of fuses and relays. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with B27B1?
Limited driving only, diagnose soon
How much does it cost to fix B27B1?
The estimated repair cost for B27B1 is $111–556. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat