OBD Guide

C1AC1

Master Module Horizontal Axis Misalignment

C1AC1 is an OBD-II diagnostic trouble code meaning: Master Module Horizontal Axis Misalignment. Common causes: mechanical damage to the srs module, incorrect installation of the module after repair. Estimated repair cost: $56–167.

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

Symptoms

  • The SRS indicator on the dashboard is on
  • Disabling the restraint system
  • The error may appear after an accident or repair

Causes

  • Mechanical damage to the SRS module
  • Incorrect installation of the module after repair
  • Malfunction of position sensors
  • Damage to the SRS wiring harness
  • Software error in the SRS control unit

How to Fix

  1. Diagnose the SRS system with a scanner
  2. Visually inspect the module and its fastenings
  3. Check the integrity of the wiring harness
  4. If necessary, calibrate or replace the module
  5. Reset errors and check the system

Related codes

FAQ

What does the C1AC1 code mean?

C1AC1 is an OBD-II diagnostic trouble code that indicates: Master Module Horizontal Axis Misalignment

What causes a C1AC1 error code?

The most common causes of C1AC1 include: Mechanical damage to the SRS module; Incorrect installation of the module after repair; Malfunction of position sensors; Damage to the SRS wiring harness.

How do I fix a C1AC1 diagnostic trouble code?

To fix C1AC1: Diagnose the SRS system with a scanner. Visually inspect the module and its fastenings. Check the integrity of the wiring harness. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1AC1?

Limited driving only, diagnose soon

How much does it cost to fix C1AC1?

The estimated repair cost for C1AC1 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

See also: Russian version · NationStat