OBD Guide
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B1797

Lamp Headlamp Low-Beam Circuit Short To Ground

B1797 is an OBD-II diagnostic trouble code meaning: Lamp Headlamp Low-Beam Circuit Short To Ground. Common causes: wiring harness damage, low beam relay malfunction. Estimated repair cost: $6–56.

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

Symptoms

  • Low beam headlights do not work
  • Fuses blow
  • Flashing headlights
  • Burnt smell from wiring harness

Causes

  • Wiring harness damage
  • Low beam relay malfunction
  • Blown fuse
  • Short circuit in headlight
  • Problems with the control unit

How to Fix

  1. Check fuses and replace blown ones
  2. Inspect the wiring harness for damage
  3. Check low beam relay
  4. Check the headlights for short circuits
  5. If necessary, replace faulty components

Related codes

B1798B1799

FAQ

What does the B1797 code mean?

B1797 is an OBD-II diagnostic trouble code that indicates: Lamp Headlamp Low-Beam Circuit Short To Ground

What causes a B1797 error code?

The most common causes of B1797 include: Wiring harness damage; Low beam relay malfunction; Blown fuse; Short circuit in headlight.

How do I fix a B1797 diagnostic trouble code?

To fix B1797: Check fuses and replace blown ones. Inspect the wiring harness for damage. Check low beam relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1797?

Limited driving only, diagnose soon

How much does it cost to fix B1797?

The estimated repair cost for B1797 is $6–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat