OBD Guide
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B12C2

Puddle Lamp Circuit Short To Ground

B12C2 is an OBD-II diagnostic trouble code meaning: Puddle Lamp Circuit Short To Ground. Common causes: wiring harness damage, short circuit in the threshold lamp. Estimated repair cost: $11–56.

Severity
✅ Low
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$11–56 (est.)

Symptoms

  • Threshold illumination does not work
  • Threshold light flashing
  • The threshold illumination lamp is constantly on

Causes

  • Wiring harness damage
  • Short circuit in the threshold lamp
  • Connection problems or contact corrosion
  • Control unit malfunction

How to Fix

  1. Check the integrity of the wiring harness
  2. Inspect the threshold illumination lamp for damage
  3. Check contacts for corrosion or poor connections
  4. If necessary, replace the lamp or wiring harness
  5. Reset the error and check if it returns

Related codes

B12C1B12C3

FAQ

What does the B12C2 code mean?

B12C2 is an OBD-II diagnostic trouble code that indicates: Puddle Lamp Circuit Short To Ground

What causes a B12C2 error code?

The most common causes of B12C2 include: Wiring harness damage; Short circuit in the threshold lamp; Connection problems or contact corrosion; Control unit malfunction.

How do I fix a B12C2 diagnostic trouble code?

To fix B12C2: Check the integrity of the wiring harness. Inspect the threshold illumination lamp for damage. Check contacts for corrosion or poor connections. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with B12C2?

Yes, but get it checked soon

How much does it cost to fix B12C2?

The estimated repair cost for B12C2 is $11–56. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat