OBD Guide
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B17B1

Rear Right Trailer Turn Lamp Control Circuit Short To Battery

B17B1 is an OBD-II diagnostic trouble code meaning: Rear Right Trailer Turn Lamp Control Circuit Short To Battery. Common causes: wiring harness damage, short circuit in lamp or socket. Estimated repair cost: $11–56.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • The right rear trailer turn signal lamp does not work
  • Turn signal flashing at increased frequency
  • Circuit fuse blown

Causes

  • Wiring harness damage
  • Short circuit in lamp or socket
  • Faulty relay or control unit
  • Contact corrosion

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect the lamp and socket for short circuits
  3. Check relays and fuses
  4. Clean contacts and eliminate corrosion
  5. Replace damaged components

Related codes

B17B0B17B2B17B3

FAQ

What does the B17B1 code mean?

B17B1 is an OBD-II diagnostic trouble code that indicates: Rear Right Trailer Turn Lamp Control Circuit Short To Battery

What causes a B17B1 error code?

The most common causes of B17B1 include: Wiring harness damage; Short circuit in lamp or socket; Faulty relay or control unit; Contact corrosion.

How do I fix a B17B1 diagnostic trouble code?

To fix B17B1: Check the integrity of the wiring harness. Inspect the lamp and socket for short circuits. Check relays and fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B17B1?

Limited driving only, diagnose soon

How much does it cost to fix B17B1?

The estimated repair cost for B17B1 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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