OBD Guide
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B27CD

Electric Compressor Motor Current Limit

B27CD is an OBD-II diagnostic trouble code meaning: Electric Compressor Motor Current Limit. Common causes: mechanical compressor jamming, problems with the wiring harness or connectors. Estimated repair cost: $167–556.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$167–556 (est.)

Symptoms

  • Turning off the air conditioning system
  • Reduced engine power (if the error is related to the turbocharger)
  • Clicking or buzzing noises coming from the engine compartment

Causes

  • Mechanical compressor jamming
  • Problems with the wiring harness or connectors
  • Compressor motor malfunction
  • Problems with the control unit

How to Fix

  1. Check the mechanical part of the compressor for jamming
  2. Diagnose an electrical circuit (resistance, voltage)
  3. Check connectors and wiring harness for damage
  4. Test the operation of the compressor motor
  5. If necessary, replace the compressor or its electric motor

Related codes

B27CEB27CFP0532

FAQ

What does the B27CD code mean?

B27CD is an OBD-II diagnostic trouble code that indicates: Electric Compressor Motor Current Limit

What causes a B27CD error code?

The most common causes of B27CD include: Mechanical compressor jamming; Problems with the wiring harness or connectors; Compressor motor malfunction; Problems with the control unit.

How do I fix a B27CD diagnostic trouble code?

To fix B27CD: Check the mechanical part of the compressor for jamming. Diagnose an electrical circuit (resistance, voltage). Check connectors and wiring harness for damage. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B27CD?

Limited driving only, diagnose soon

How much does it cost to fix B27CD?

The estimated repair cost for B27CD is $167–556. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat