OBD Guide
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B17B9

Right Stop Lamp Control Circuit Overcurrent

B17B9 is an OBD-II diagnostic trouble code meaning: Right Stop Lamp Control Circuit Overcurrent. Common causes: burnt out brake light bulb, short circuit in the circuit. Estimated repair cost: $6–56.

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

Symptoms

  • Right brake light does not work
  • Brake light flashing
  • Dashboard warning

Causes

  • Burnt out brake light bulb
  • Short circuit in the circuit
  • Oxidation of contacts
  • Wiring harness damage
  • Control unit malfunction

How to Fix

  1. Check the brake light bulb
  2. Inspect the contacts and lamp socket
  3. Check wiring integrity
  4. Measure circuit resistance
  5. If necessary, replace the control unit

Related codes

B17B8B17BA

FAQ

What does the B17B9 code mean?

B17B9 is an OBD-II diagnostic trouble code that indicates: Right Stop Lamp Control Circuit Overcurrent

What causes a B17B9 error code?

The most common causes of B17B9 include: Burnt out brake light bulb; Short circuit in the circuit; Oxidation of contacts; Wiring harness damage.

How do I fix a B17B9 diagnostic trouble code?

To fix B17B9: Check the brake light bulb. Inspect the contacts and lamp socket. Check wiring integrity. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B17B9?

Limited driving only, diagnose soon

How much does it cost to fix B17B9?

The estimated repair cost for B17B9 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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