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Engine-Codes – Generic – C1146

C1146 Code - Side G Sensor Circuit

Quick Answer

The C1146 diagnostic trouble code (DTC) refers to a fault in the Side G Sensor Circuit of the vehicle. Common causes include Faulty side G sensor, Wiring harness or connector damage, Corrosion or water intrusion in the sensor circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
C1146 indicates Side G Sensor Circuit.
Common causes
Common causes include Faulty side G sensor, Wiring harness or connector damage, Corrosion or water intrusion in the sensor circuit.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code C1146 Description

The C1146 diagnostic trouble code (DTC) refers to a fault in the Side G Sensor Circuit of the vehicle. This sensor is responsible for detecting lateral or side impacts and providing crucial data to the vehicle's airbag system for deployment in the event of a collision. When this circuit malfunctions, it can lead to potential safety hazards as the airbags may not deploy correctly or at all during a side impact.

OBDII Code C1146 - Side G Sensor Circuit
C1146 Code - Side G Sensor Circuit

Common Causes of C1146

  1. Faulty side G sensor
  2. Wiring harness or connector damage
  3. Corrosion or water intrusion in the sensor circuit
  4. Impact damage to the sensor or its mounting location
  5. Electronic control unit (ECU) software malfunction

Symptoms of C1146

  1. Airbag warning light illuminated on the dashboard
  2. Airbag system failure or malfunction message displayed on the instrument cluster
  3. Inability to deploy side airbags in the event of a collision
  4. Erratic behavior of the airbag system during self-tests or diagnostics
  5. Vehicle may fail state inspection due to airbag system fault

How to Fix C1146

  1. Begin by diagnosing the exact cause of the issue using a diagnostic scanner and multimeter to pinpoint the faulty component.
  2. Inspect the wiring harness and connectors for any visible damage or corrosion, repairing or replacing as necessary.
  3. Test the sensor itself for correct operation and replace if found faulty.
  4. Clear the DTC from the vehicle's ECU memory using a diagnostic tool.
  5. Perform a thorough test drive to ensure the issue has been resolved and the airbag system functions correctly.

Cost to Fix C1146

The cost of repairing a Side G Sensor Circuit issue can vary depending on the specific cause of the fault and the parts required for repair. On average, the repair cost for this type of issue can range from $150 to $500, including parts and labor. However, it's important to note that labor rates can vary significantly based on location and the type of repair facility. It is recommended to obtain quotes from local auto repair shops to get a more accurate estimate for this repair.

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Code C1146 Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about C1146 Code

1. What does the OBDII code C1146 mean?

C1146 indicates an issue with the Side G Sensor Circuit, which monitors lateral acceleration to assist with stability and traction control systems.

2. What are common symptoms of the C1146 code?

Symptoms include the ABS light or traction control light illuminating, reduced stability control functionality, and potential loss of traction during sharp turns.

3. What causes the C1146 code to appear?

Common causes include a faulty side G sensor, damaged wiring or connectors in the sensor circuit, or issues with the ABS control module.

4. Can I drive my car with a C1146 code?

While the vehicle may still be drivable, the stability and traction control systems may not function properly, increasing the risk of losing control in slippery or sharp-turn situations.

5. How is the C1146 code diagnosed?

A technician will use a scan tool to confirm the code, inspect the wiring and connectors to the side G sensor, and test the sensor itself for proper operation.

6. How do you fix a C1146 code?

Repairs may involve replacing the side G sensor, repairing or replacing damaged wiring, or recalibrating the sensor using a diagnostic tool.

7. Does the C1146 code require sensor recalibration?

Yes, after replacing or repairing the side G sensor, recalibration with a diagnostic tool is often necessary to ensure proper operation.

8. How much does it cost to fix a C1146 code?

The repair cost varies depending on the vehicle and the specific issue, but replacing a side G sensor typically costs between $150 and $300, including parts and labor.

9. Can a low battery trigger the C1146 code?

Yes, a weak or low battery can cause voltage drops that might trigger sensor-related codes, including C1146.

10. How can I prevent the C1146 code from occurring again?

Regularly inspect and maintain the vehicle’s wiring, connectors, and sensors, and ensure the battery and charging system are in good condition.

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