OBD Guide
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B16B5

Right Stop Lamp Control Circuit High

B16B5 is an OBD-II diagnostic trouble code meaning: Right Stop Lamp Control Circuit High. Common causes: short circuit in wiring harness, brake light relay malfunction. Estimated repair cost: $22–89.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$22–89 (est.)

Symptoms

  • Flashing or inoperative right brake light
  • Dashboard warning
  • Incorrect operation of other lighting devices

Causes

  • Short circuit in wiring harness
  • Brake light relay malfunction
  • Damage to the lighting control unit
  • Oxidation of contacts or corrosion of connectors

How to Fix

  1. Check wiring harness for damage
  2. Inspect relays and fuses
  3. Check the voltage at the right brake light contacts
  4. Replace faulty components

Related codes

B16B4B16B6B1620

FAQ

What does the B16B5 code mean?

B16B5 is an OBD-II diagnostic trouble code that indicates: Right Stop Lamp Control Circuit High

What causes a B16B5 error code?

The most common causes of B16B5 include: Short circuit in wiring harness; Brake light relay malfunction; Damage to the lighting control unit; Oxidation of contacts or corrosion of connectors.

How do I fix a B16B5 diagnostic trouble code?

To fix B16B5: Check wiring harness for damage. Inspect relays and fuses. Check the voltage at the right brake light contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B16B5?

Limited driving only, diagnose soon

How much does it cost to fix B16B5?

The estimated repair cost for B16B5 is $22–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat