OBD Guide
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B163B

Front Left Turn Control Circuit Low

B163B is an OBD-II diagnostic trouble code meaning: Front Left Turn Control Circuit Low. Common causes: burnt out turn signal lamp, open or short circuit in wiring harness. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$6–56 (est.)

Symptoms

  • Left front turn signal does not work
  • Left front turn signal blinks too quickly
  • The left front turn signal is unstable

Causes

  • Burnt out turn signal lamp
  • Open or short circuit in wiring harness
  • Faulty turn signal relay
  • Corrosion in connectors
  • Malfunction of the lighting control unit

How to Fix

  1. Check the left front turn signal lamp
  2. Check the integrity of the wiring harness
  3. Check turn signal relay
  4. Clean connector contacts
  5. Check the lighting control unit

Related codes

B163AB163CB163D

FAQ

What does the B163B code mean?

B163B is an OBD-II diagnostic trouble code that indicates: Front Left Turn Control Circuit Low

What causes a B163B error code?

The most common causes of B163B include: Burnt out turn signal lamp; Open or short circuit in wiring harness; Faulty turn signal relay; Corrosion in connectors.

How do I fix a B163B diagnostic trouble code?

To fix B163B: Check the left front turn signal lamp. Check the integrity of the wiring harness. Check turn signal relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B163B?

Limited driving only, diagnose soon

How much does it cost to fix B163B?

The estimated repair cost for B163B is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat