OBD Guide
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C1100

ABS Pump Switch Circuit Failure - Generic

C1100 is an OBD-II diagnostic trouble code meaning: ABS Pump Switch Circuit Failure - Generic. Common causes: open or short circuit in wiring harness, abs pump relay malfunction. Estimated repair cost: $56–167.

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

Symptoms

  • The ABS indicator on the dashboard is on
  • Reduced braking performance
  • Activating emergency ABS mode

Causes

  • Open or short circuit in wiring harness
  • ABS pump relay malfunction
  • Problems with the ABS control unit
  • Contact corrosion

How to Fix

  1. Check wiring harness for damage
  2. Check ABS pump relay
  3. Scan the ABS control unit for errors
  4. Replace faulty components

Related codes

C1101C1102C1103

FAQ

What does the C1100 code mean?

C1100 is an OBD-II diagnostic trouble code that indicates: ABS Pump Switch Circuit Failure - Generic

What causes a C1100 error code?

The most common causes of C1100 include: Open or short circuit in wiring harness; ABS pump relay malfunction; Problems with the ABS control unit; Contact corrosion.

How do I fix a C1100 diagnostic trouble code?

To fix C1100: Check wiring harness for damage. Check ABS pump relay. Scan the ABS control unit for errors. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1100?

Limited driving only, diagnose soon

How much does it cost to fix C1100?

The estimated repair cost for C1100 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat