OBD Guide
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C2808

Trailer Brake Output Circuit Short To Overload

C2808 is an OBD-II diagnostic trouble code meaning: Trailer Brake Output Circuit Short To Overload. Common causes: wiring harness damage, short circuit in trailer brake control module. Estimated repair cost: $56–167.

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

Symptoms

  • Fault indicator is on
  • Trailer brakes do not work
  • Circuit protection tripped

Causes

  • Wiring harness damage
  • Short circuit in trailer brake control module
  • Trailer brake malfunction
  • Contact corrosion
  • Incorrect trailer connection

How to Fix

  1. Check wiring harness for damage
  2. Inspect the trailer connection contacts for corrosion.
  3. Check trailer brake control module
  4. Test trailer brakes
  5. Clean or replace damaged components

Related codes

C2807C2809

FAQ

What does the C2808 code mean?

C2808 is an OBD-II diagnostic trouble code that indicates: Trailer Brake Output Circuit Short To Overload

What causes a C2808 error code?

The most common causes of C2808 include: Wiring harness damage; Short circuit in trailer brake control module; Trailer brake malfunction; Contact corrosion.

How do I fix a C2808 diagnostic trouble code?

To fix C2808: Check wiring harness for damage. Inspect the trailer connection contacts for corrosion.. Check trailer brake control module. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C2808?

Do not drive — repair immediately

How much does it cost to fix C2808?

The estimated repair cost for C2808 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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