OBD Guide
ENFRDEESPT

C1091

ABS Brake Lamp Control Circuit High

C1091 is an OBD-II diagnostic trouble code meaning: ABS Brake Lamp Control Circuit High. Common causes: open or short circuit in wiring harness, abs module malfunction. Estimated repair cost: $56–167.

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$56–167 (est.)

Symptoms

  • ABS light is on
  • ABS light does not light up when ignition is turned on
  • Incorrect operation of the ABS system

Causes

  • Open or short circuit in wiring harness
  • ABS module malfunction
  • Relay or fuse problems
  • Corrosion of contacts in connectors

How to Fix

  1. Check the wiring harness for opens and shorts
  2. Diagnose ABS module
  3. Check the condition of the relays and fuses
  4. Clean the contacts in the connectors

Related codes

C1090C1092C1093

FAQ

What does the C1091 code mean?

C1091 is an OBD-II diagnostic trouble code that indicates: ABS Brake Lamp Control Circuit High

What causes a C1091 error code?

The most common causes of C1091 include: Open or short circuit in wiring harness; ABS module malfunction; Relay or fuse problems; Corrosion of contacts in connectors.

How do I fix a C1091 diagnostic trouble code?

To fix C1091: Check the wiring harness for opens and shorts. Diagnose ABS module. Check the condition of the relays and fuses. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1091?

Limited driving only, diagnose soon

How much does it cost to fix C1091?

The estimated repair cost for C1091 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

FRDEESPT

See also: Russian version · NationStat