OBD Guide
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C1AEC

Front Sensor Communication Circuit

C1AEC is an OBD-II diagnostic trouble code meaning: Front Sensor Communication Circuit. Common causes: open or shorted wiring harness, contact corrosion. Estimated repair cost: $56–167.

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

Symptoms

  • Airbag light is on
  • Error message on the dashboard
  • ABS/ESP system failure (on some models)

Causes

  • Open or shorted wiring harness
  • Contact corrosion
  • Front shock sensor malfunction
  • Problems with the security control unit
  • Damage to the sensor connector

How to Fix

  1. Check the integrity of the wiring harness and contacts
  2. Check the sensor resistance according to the technical documentation
  3. Replace sensor if necessary
  4. Reset the error with an OBD-II scanner
  5. Check the operation of the system after repair

Related codes

B0001B0020U0121

FAQ

What does the C1AEC code mean?

C1AEC is an OBD-II diagnostic trouble code that indicates: Front Sensor Communication Circuit

What causes a C1AEC error code?

The most common causes of C1AEC include: Open or shorted wiring harness; Contact corrosion; Front shock sensor malfunction; Problems with the security control unit.

How do I fix a C1AEC diagnostic trouble code?

To fix C1AEC: Check the integrity of the wiring harness and contacts. Check the sensor resistance according to the technical documentation. Replace sensor if necessary. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1AEC?

Do not drive — repair immediately

How much does it cost to fix C1AEC?

The estimated repair cost for C1AEC is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat