OBD Guide
ENFRDEESPT

B163C

Front Left Turn Control Circuit High

B163C is an OBD-II diagnostic trouble code meaning: Front Left Turn Control Circuit High. Common causes: broken or damaged wires in the harness, oxidation of contacts in connectors. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$22–89 (est.)

Symptoms

  • Left front turn signal does not work
  • Turn signal blinking at abnormal frequency
  • The malfunction indicator lamp on the instrument panel lights up

Causes

  • Broken or damaged wires in the harness
  • Oxidation of contacts in connectors
  • Turn signal relay malfunction
  • Damage to the turn signal itself
  • Short circuit in the circuit

How to Fix

  1. Visually inspect the wiring harness for damage
  2. Checking contacts in connectors, cleaning oxides
  3. Diagnostics of circuit resistance using a multimeter
  4. Checking the functionality of the turn signal relay
  5. Replacing damaged circuit elements

Related codes

B163DB163BB163A

FAQ

What does the B163C code mean?

B163C is an OBD-II diagnostic trouble code that indicates: Front Left Turn Control Circuit High

What causes a B163C error code?

The most common causes of B163C include: Broken or damaged wires in the harness; Oxidation of contacts in connectors; Turn signal relay malfunction; Damage to the turn signal itself.

How do I fix a B163C diagnostic trouble code?

To fix B163C: Visually inspect the wiring harness for damage. Checking contacts in connectors, cleaning oxides. Diagnostics of circuit resistance using a multimeter. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B163C?

Do not drive — repair immediately

How much does it cost to fix B163C?

The estimated repair cost for B163C is $22–89. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat