OBD Guide
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B27D2

Starter Cut Relay On Stuck

B27D2 is an OBD-II diagnostic trouble code meaning: Starter Cut Relay On Stuck. Common causes: starter relay contacts sticking, short circuit in control circuit. Estimated repair cost: $22–111.

Severity
🔴 High
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–111 (est.)

Symptoms

  • The starter continues to operate after the engine starts
  • Relay clicks when ignition is off
  • Low battery
  • The starter does not turn off automatically

Causes

  • Starter relay contacts sticking
  • Short circuit in control circuit
  • Engine control unit malfunction
  • Corrosion of relay contacts
  • Wiring harness damage

How to Fix

  1. Check the condition of the starter relay (visual inspection, testing)
  2. Replace the starter relay if stuck
  3. Check the integrity of the wiring harness and connectors
  4. Test relay control circuit
  5. If necessary, replace the engine control unit

Related codes

B27D0B27D1P0615

FAQ

What does the B27D2 code mean?

B27D2 is an OBD-II diagnostic trouble code that indicates: Starter Cut Relay On Stuck

What causes a B27D2 error code?

The most common causes of B27D2 include: Starter relay contacts sticking; Short circuit in control circuit; Engine control unit malfunction; Corrosion of relay contacts.

How do I fix a B27D2 diagnostic trouble code?

To fix B27D2: Check the condition of the starter relay (visual inspection, testing). Replace the starter relay if stuck. Check the integrity of the wiring harness and connectors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B27D2?

Limited driving only, diagnose soon

How much does it cost to fix B27D2?

The estimated repair cost for B27D2 is $22–111. Actual cost depends on your vehicle, location, and labor rates.

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