OBD Guide
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B1873

Turn Signal / Hazard Power Feed Circuit Short To Ground

B1873 is an OBD-II diagnostic trouble code meaning: Turn Signal / Hazard Power Feed Circuit Short To Ground. Common causes: wiring harness damage, short circuit to ground. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)

Symptoms

  • Turn signals don't work
  • Hazard alarm does not work
  • Turn signals flashing at the wrong frequency
  • The malfunction indicator on the dashboard is on

Causes

  • Wiring harness damage
  • Short circuit to ground
  • Turn signal relay malfunction
  • Contact corrosion
  • Control unit malfunction

How to Fix

  1. Check wiring harness for damage
  2. Check the integrity of the power circuit
  3. Check turn signal relay
  4. Check control unit
  5. Replace damaged components

Related codes

B1874B1875

FAQ

What does the B1873 code mean?

B1873 is an OBD-II diagnostic trouble code that indicates: Turn Signal / Hazard Power Feed Circuit Short To Ground

What causes a B1873 error code?

The most common causes of B1873 include: Wiring harness damage; Short circuit to ground; Turn signal relay malfunction; Contact corrosion.

How do I fix a B1873 diagnostic trouble code?

To fix B1873: Check wiring harness for damage. Check the integrity of the power circuit. Check turn signal relay. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B1873?

Do not drive — repair immediately

How much does it cost to fix B1873?

The estimated repair cost for B1873 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat