OBD Guide
ENFRDEESPT

B2546

System Power Relay Circuit Failure

B2546 is an OBD-II diagnostic trouble code meaning: System Power Relay Circuit Failure. Common causes: faulty power relay, open or shorted wiring harness. Estimated repair cost: $22–111.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–111 (est.)

Symptoms

  • Failure of passive safety systems
  • Loss of power to electronic modules
  • Unstable engine operation
  • Extinguished instruments on the panel

Causes

  • Faulty power relay
  • Open or shorted wiring harness
  • Fuse problems
  • Oxidation of contacts

How to Fix

  1. Check the condition of the power relay
  2. Inspect the wiring harness for damage
  3. Check fuses
  4. Clean relay contacts and connectors

Related codes

B2545B2547P0560

FAQ

What does the B2546 code mean?

B2546 is an OBD-II diagnostic trouble code that indicates: System Power Relay Circuit Failure

What causes a B2546 error code?

The most common causes of B2546 include: Faulty power relay; Open or shorted wiring harness; Fuse problems; Oxidation of contacts.

How do I fix a B2546 diagnostic trouble code?

To fix B2546: Check the condition of the power relay. Inspect the wiring harness for damage. Check fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B2546?

Do not drive — repair immediately

How much does it cost to fix B2546?

The estimated repair cost for B2546 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat