OBD Guide
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C1243

Acceleration Sensor Stuck Malfunction

C1243 is an OBD-II diagnostic trouble code meaning: Acceleration Sensor Stuck Malfunction. Common causes: acceleration sensor jammed, open or short circuit in wiring harness. Estimated repair cost: $56–167.

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

Symptoms

  • The passive safety system fault indicator is on
  • Lack of airbag response during testing
  • Errors in other related systems

Causes

  • Acceleration sensor jammed
  • Open or short circuit in wiring harness
  • Contact corrosion
  • Mechanical damage to the sensor
  • Control unit malfunction

How to Fix

  1. Check the integrity of the sensor and its fastening
  2. Inspect the wiring harness for damage
  3. Clean contacts from corrosion
  4. Replace sensor if necessary
  5. Reset the error and check the system

Related codes

B0001B0002B0010

FAQ

What does the C1243 code mean?

C1243 is an OBD-II diagnostic trouble code that indicates: Acceleration Sensor Stuck Malfunction

What causes a C1243 error code?

The most common causes of C1243 include: Acceleration sensor jammed; Open or short circuit in wiring harness; Contact corrosion; Mechanical damage to the sensor.

How do I fix a C1243 diagnostic trouble code?

To fix C1243: Check the integrity of the sensor and its fastening. Inspect the wiring harness for damage. Clean contacts from corrosion. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with C1243?

Do not drive — repair immediately

How much does it cost to fix C1243?

The estimated repair cost for C1243 is $56–167. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat