OBD Guide
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B170B

Right Reverse Lamp Control Circuit

B170B is an OBD-II diagnostic trouble code meaning: Right Reverse Lamp Control Circuit. Common causes: burnt out reverse lamp, open or short circuit in wiring harness. Estimated repair cost: $6–56.

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

Symptoms

  • The right reverse lamp does not work
  • Right reverse lamp flashing
  • Error message on the dashboard

Causes

  • Burnt out reverse lamp
  • Open or short circuit in wiring harness
  • Faulty relay
  • Problems with the control unit

How to Fix

  1. Check the condition of the right reverse lamp
  2. Check the integrity of the wiring harness and contacts
  3. Check relay operation
  4. Scan the control unit for other errors

Related codes

B170AB170CB170D

FAQ

What does the B170B code mean?

B170B is an OBD-II diagnostic trouble code that indicates: Right Reverse Lamp Control Circuit

What causes a B170B error code?

The most common causes of B170B include: Burnt out reverse lamp; Open or short circuit in wiring harness; Faulty relay; Problems with the control unit.

How do I fix a B170B diagnostic trouble code?

To fix B170B: Check the condition of the right reverse lamp. Check the integrity of the wiring harness and contacts. Check relay operation. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B170B?

Do not drive — repair immediately

How much does it cost to fix B170B?

The estimated repair cost for B170B is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat