OBD Guide
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B26FA

Cranking Request Circuit Open

B26FA is an OBD-II diagnostic trouble code meaning: Cranking Request Circuit Open. Common causes: open or damaged start request circuit wires, corrosion or poor contact in connectors. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Engine won't start
  • The 'check engine' light is on
  • Security error message on dashboard

Causes

  • Open or damaged start request circuit wires
  • Corrosion or poor contact in connectors
  • Passive safety module malfunction
  • Problems with the relay or circuit fuse

How to Fix

  1. Check the integrity of the wiring and contacts in the start request circuit
  2. Inspect the connectors of the passive safety module and the ECU
  3. Check the condition of the relays and fuses
  4. If the problem is not found, diagnose the passive safety module
  5. Eliminate detected faults and clear errors

Related codes

B0020B0021U0100

FAQ

What does the B26FA code mean?

B26FA is an OBD-II diagnostic trouble code that indicates: Cranking Request Circuit Open

What causes a B26FA error code?

The most common causes of B26FA include: Open or damaged start request circuit wires; Corrosion or poor contact in connectors; Passive safety module malfunction; Problems with the relay or circuit fuse.

How do I fix a B26FA diagnostic trouble code?

To fix B26FA: Check the integrity of the wiring and contacts in the start request circuit. Inspect the connectors of the passive safety module and the ECU. Check the condition of the relays and fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B26FA?

Do not drive — repair immediately

How much does it cost to fix B26FA?

The estimated repair cost for B26FA is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat