OBD Guide
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B2642

Electric Compressor Main Voltage Malfunction

B2642 is an OBD-II diagnostic trouble code meaning: Electric Compressor Main Voltage Malfunction. Common causes: open or short circuit in wiring harness, faulty relay or fuse. Estimated repair cost: $56–222.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–222 (est.)

Symptoms

  • Climate control does not work
  • Reduced engine power (if the compressor is connected to turbocharging)
  • Check Engine light comes on

Causes

  • Open or short circuit in wiring harness
  • Faulty relay or fuse
  • Problems with the control module
  • Electric compressor malfunction

How to Fix

  1. Check fuses and relays associated with the compressor
  2. Inspect the wiring harness for damage
  3. Check the voltage at the compressor terminals
  4. Test the compressor for malfunctions
  5. If necessary, replace the compressor or control module

Related codes

B2640B2641B2643

FAQ

What does the B2642 code mean?

B2642 is an OBD-II diagnostic trouble code that indicates: Electric Compressor Main Voltage Malfunction

What causes a B2642 error code?

The most common causes of B2642 include: Open or short circuit in wiring harness; Faulty relay or fuse; Problems with the control module; Electric compressor malfunction.

How do I fix a B2642 diagnostic trouble code?

To fix B2642: Check fuses and relays associated with the compressor. Inspect the wiring harness for damage. Check the voltage at the compressor terminals. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2642?

Limited driving only, diagnose soon

How much does it cost to fix B2642?

The estimated repair cost for B2642 is $56–222. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat