OBD Guide
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B16B4

Right Stop Lamp Control Circuit Low

B16B4 is an OBD-II diagnostic trouble code meaning: Right Stop Lamp Control Circuit Low. Common causes: burnt out lamp, broken or shorted wiring. Estimated repair cost: $6–56.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$6–56 (est.)

Symptoms

  • Right brake light does not work
  • The warning light on the instrument panel is on
  • Diagnostic error

Causes

  • Burnt out lamp
  • Broken or shorted wiring
  • Oxidized contacts
  • Bad fuse
  • Problems with the control unit

How to Fix

  1. Check the integrity of the lamp
  2. Inspect the wiring for damage
  3. Check contacts for oxidation
  4. Test the circuit with a multimeter
  5. Replace faulty components

Related codes

B16B3B16B5B1485

FAQ

What does the B16B4 code mean?

B16B4 is an OBD-II diagnostic trouble code that indicates: Right Stop Lamp Control Circuit Low

What causes a B16B4 error code?

The most common causes of B16B4 include: Burnt out lamp; Broken or shorted wiring; Oxidized contacts; Bad fuse.

How do I fix a B16B4 diagnostic trouble code?

To fix B16B4: Check the integrity of the lamp. Inspect the wiring for damage. Check contacts for oxidation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B16B4?

Do not drive — repair immediately

How much does it cost to fix B16B4?

The estimated repair cost for B16B4 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat