OBD Guide
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B2551

Pulse Width Modulation Motor Right Power Supply Circuit Malfunction

B2551 is an OBD-II diagnostic trouble code meaning: Pulse Width Modulation Motor Right Power Supply Circuit Malfunction. Common causes: open or short circuit in wiring harness, solenoid valve malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Incorrect operation of the right engine
  • The malfunction lamp on the dashboard lights up
  • Reduced system efficiency

Causes

  • Open or short circuit in wiring harness
  • Solenoid valve malfunction
  • Problems with the control unit
  • Contact corrosion

How to Fix

  1. Check the integrity of the wiring harness
  2. Check the resistance of the solenoid valve
  3. Diagnose the control unit for errors
  4. Clean or replace corroded contacts

Related codes

B2550B2552B2553

FAQ

What does the B2551 code mean?

B2551 is an OBD-II diagnostic trouble code that indicates: Pulse Width Modulation Motor Right Power Supply Circuit Malfunction

What causes a B2551 error code?

The most common causes of B2551 include: Open or short circuit in wiring harness; Solenoid valve malfunction; Problems with the control unit; Contact corrosion.

How do I fix a B2551 diagnostic trouble code?

To fix B2551: Check the integrity of the wiring harness. Check the resistance of the solenoid valve. Diagnose the control unit for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2551?

Limited driving only, diagnose soon

How much does it cost to fix B2551?

The estimated repair cost for B2551 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat