OBD Guide
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B2640

Electric Compressor Main Voltage Minimum

B2640 is an OBD-II diagnostic trouble code meaning: Electric Compressor Main Voltage Minimum. Common causes: main compressor malfunction, problems in the compressor power circuit. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Climate control system failure
  • Insufficient interior cooling
  • Compressor overheating

Causes

  • Main compressor malfunction
  • Problems in the compressor power circuit
  • Climate control system controller failure
  • Wiring harness damage

How to Fix

  1. Check the voltage at the compressor input
  2. Inspect the wiring harness for damage
  3. Check the performance of the compressor
  4. Replace faulty components

Related codes

B2635B2637B2639

FAQ

What does the B2640 code mean?

B2640 is an OBD-II diagnostic trouble code that indicates: Electric Compressor Main Voltage Minimum

What causes a B2640 error code?

The most common causes of B2640 include: Main compressor malfunction; Problems in the compressor power circuit; Climate control system controller failure; Wiring harness damage.

How do I fix a B2640 diagnostic trouble code?

To fix B2640: Check the voltage at the compressor input. Inspect the wiring harness for damage. Check the performance of the compressor. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2640?

Limited driving only, diagnose soon

How much does it cost to fix B2640?

The estimated repair cost for B2640 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat