OBD Guide
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B26F3

Starter Lock Relay On

B26F3 is an OBD-II diagnostic trouble code meaning: Starter Lock Relay On. Common causes: faulty starter interlock relay, open or shorted wiring harness. Estimated repair cost: $17–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$17–89 (est.)

Symptoms

  • Engine won't start
  • Starter does not engage when turning key
  • The immobilizer indicator is flashing

Causes

  • Faulty starter interlock relay
  • Open or shorted wiring harness
  • Immobilizer problems
  • Oxidized contacts in connectors
  • Weak battery or poor ground contact

How to Fix

  1. Check battery charge and terminal condition
  2. Scan the immobilizer system for errors
  3. Study the starter interlock circuit diagram for this model
  4. Check the relay circuit for opens and shorts
  5. Check the functionality of the starter interlock relay
  6. Inspect and clean the contacts in the control circuit connectors

Related codes

B26F1B26F2P0510

FAQ

What does the B26F3 code mean?

B26F3 is an OBD-II diagnostic trouble code that indicates: Starter Lock Relay On

What causes a B26F3 error code?

The most common causes of B26F3 include: Faulty starter interlock relay; Open or shorted wiring harness; Immobilizer problems; Oxidized contacts in connectors.

How do I fix a B26F3 diagnostic trouble code?

To fix B26F3: Check battery charge and terminal condition. Scan the immobilizer system for errors. Study the starter interlock circuit diagram for this model. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B26F3?

Yes, but get it checked soon

How much does it cost to fix B26F3?

The estimated repair cost for B26F3 is $17–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat