OBD Guide
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B2787

Electric Compressor Voltage Saturation

B2787 is an OBD-II diagnostic trouble code meaning: Electric Compressor Voltage Saturation. Common causes: electric compressor malfunction, wiring harness damage. Estimated repair cost: $111–333.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$111–333 (est.)

Symptoms

  • Reduced efficiency of the air conditioning system
  • Unstable engine operation
  • Check Engine Light Illuminates

Causes

  • Electric compressor malfunction
  • Wiring harness damage
  • Problems with the control unit
  • Short circuit in the circuit

How to Fix

  1. Check the voltage in the compressor circuit
  2. Inspect the wiring harness for damage
  3. Test the compressor on the bench
  4. Replace faulty components

Related codes

B2788B2789P0532

FAQ

What does the B2787 code mean?

B2787 is an OBD-II diagnostic trouble code that indicates: Electric Compressor Voltage Saturation

What causes a B2787 error code?

The most common causes of B2787 include: Electric compressor malfunction; Wiring harness damage; Problems with the control unit; Short circuit in the circuit.

How do I fix a B2787 diagnostic trouble code?

To fix B2787: Check the voltage in the compressor circuit. Inspect the wiring harness for damage. Test the compressor on the bench. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2787?

Limited driving only, diagnose soon

How much does it cost to fix B2787?

The estimated repair cost for B2787 is $111–333. Actual cost depends on your vehicle, location, and labor rates.

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