OBD Guide
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B13BF

Run/Start Input Circuit Short to Ground Or Open

B13BF is an OBD-II diagnostic trouble code meaning: Run/Start Input Circuit Short to Ground Or Open. Common causes: wiring harness damage, ignition relay malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • Problems starting the engine
  • Unstable engine operation
  • Check Engine Light Is On

Causes

  • Wiring harness damage
  • Ignition relay malfunction
  • Problems with the ECU
  • Short circuit to ground
  • Open circuit

How to Fix

  1. Check the wiring harness for damage
  2. Check ignition relay
  3. Check the integrity of the Run/Start input circuit
  4. Check the computer for faults
  5. Replace damaged components

Related codes

B13BEB13C0P0562P0563

FAQ

What does the B13BF code mean?

B13BF is an OBD-II diagnostic trouble code that indicates: Run/Start Input Circuit Short to Ground Or Open

What causes a B13BF error code?

The most common causes of B13BF include: Wiring harness damage; Ignition relay malfunction; Problems with the ECU; Short circuit to ground.

How do I fix a B13BF diagnostic trouble code?

To fix B13BF: Check the wiring harness for damage. Check ignition relay. Check the integrity of the Run/Start input circuit. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B13BF?

Limited driving only, diagnose soon

How much does it cost to fix B13BF?

The estimated repair cost for B13BF is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat