OBD Guide
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C1120

Front Left Input ABS Solenoid

C1120 is an OBD-II diagnostic trouble code meaning: Front Left Input ABS Solenoid. Common causes: abs solenoid malfunction, open or short circuit in control circuit. 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
  • Uneven braking when ABS is activated
  • Brake pedal vibration during normal braking

Causes

  • ABS solenoid malfunction
  • Open or short circuit in control circuit
  • Poor contact in solenoid connector
  • Problems with the ABS module

How to Fix

  1. Check the integrity of the wiring harness to the solenoid
  2. Check the contacts in the solenoid connector
  3. Measure the solenoid resistance
  4. Check voltage on control circuit
  5. Replace faulty solenoid if necessary

Related codes

C1110C1130C1140

FAQ

What does the C1120 code mean?

C1120 is an OBD-II diagnostic trouble code that indicates: Front Left Input ABS Solenoid

What causes a C1120 error code?

The most common causes of C1120 include: ABS solenoid malfunction; Open or short circuit in control circuit; Poor contact in solenoid connector; Problems with the ABS module.

How do I fix a C1120 diagnostic trouble code?

To fix C1120: Check the integrity of the wiring harness to the solenoid. Check the contacts in the solenoid connector. Measure the solenoid resistance. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1120?

Limited driving only, diagnose soon

How much does it cost to fix C1120?

The estimated repair cost for C1120 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat