OBD Guide
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B1557

Ignition Run/Start Circuit Short To Battery

B1557 is an OBD-II diagnostic trouble code meaning: Ignition Run/Start Circuit Short To Battery. Common causes: damaged wiring harness insulation, short circuit in starter relay. Estimated repair cost: $28–111.

Severity
🔴 High
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–111 (est.)

Symptoms

  • Constant rotation of the starter
  • Battery low
  • Hot wire harness
  • Fuse tripping

Causes

  • Damaged wiring harness insulation
  • Short circuit in starter relay
  • Damage to the ignition switch
  • Engine control unit malfunction

How to Fix

  1. Check the condition of the wiring harness for damage
  2. Check the starter relay and its circuit
  3. Diagnose the ignition switch
  4. Check the integrity of the wiring to the control unit
  5. Replace damaged wires or components as necessary

Related codes

B1555B1556B1558

FAQ

What does the B1557 code mean?

B1557 is an OBD-II diagnostic trouble code that indicates: Ignition Run/Start Circuit Short To Battery

What causes a B1557 error code?

The most common causes of B1557 include: Damaged wiring harness insulation; Short circuit in starter relay; Damage to the ignition switch; Engine control unit malfunction.

How do I fix a B1557 diagnostic trouble code?

To fix B1557: Check the condition of the wiring harness for damage. Check the starter relay and its circuit. Diagnose the ignition switch. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1557?

Yes, but get it checked soon

How much does it cost to fix B1557?

The estimated repair cost for B1557 is $28–111. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat