OBD Guide
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B1356

Ignition Run Circuit Open

B1356 is an OBD-II diagnostic trouble code meaning: Ignition Run Circuit Open. Common causes: broken or damaged wiring harness, faulty ignition relay. Estimated repair cost: $56–167.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • Engine won't start
  • Problems starting the engine
  • Loss of power in electronic systems

Causes

  • Broken or damaged wiring harness
  • Faulty ignition relay
  • Problems with the ignition switch
  • Contact corrosion

How to Fix

  1. Check wiring harness for damage
  2. Check ignition relay
  3. Inspect the ignition switch
  4. Check contacts for corrosion

Related codes

B1355B1357P0351

FAQ

What does the B1356 code mean?

B1356 is an OBD-II diagnostic trouble code that indicates: Ignition Run Circuit Open

What causes a B1356 error code?

The most common causes of B1356 include: Broken or damaged wiring harness; Faulty ignition relay; Problems with the ignition switch; Contact corrosion.

How do I fix a B1356 diagnostic trouble code?

To fix B1356: Check wiring harness for damage. Check ignition relay. Inspect the ignition switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1356?

Yes, but get it checked soon

How much does it cost to fix B1356?

The estimated repair cost for B1356 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat