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Engine-Codes – Generic – C1949

C1949 Code - Accelerometer Sensor Circuit Open

Quick Answer

The C1949 diagnostic trouble code (DTC) indicates that there is an open circuit in the accelerometer sensor in the vehicle. Common causes include Damaged wiring or connectors in the accelerometer sensor circuit, Faulty accelerometer sensor, Corrosion or moisture intrusion in the sensor or 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
C1949 indicates Accelerometer Sensor Circuit Open.
Common causes
Common causes include Damaged wiring or connectors in the accelerometer sensor circuit, Faulty accelerometer sensor, Corrosion or moisture intrusion in the sensor or 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 Sep 10, 2024
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Code C1949 Description

The C1949 diagnostic trouble code (DTC) indicates that there is an open circuit in the accelerometer sensor in the vehicle. The accelerometer sensor is responsible for detecting changes in acceleration, deceleration, and lateral movement of the vehicle. This information is crucial for various vehicle systems, such as traction control, stability control, and even airbag deployment in some cases.

OBDII Code C1949 - Accelerometer Sensor Circuit Open
C1949 Code - Accelerometer Sensor Circuit Open

Common Causes of C1949

  1. Damaged wiring or connectors in the accelerometer sensor circuit.
  2. Faulty accelerometer sensor.
  3. Corrosion or moisture intrusion in the sensor or circuit.
  4. Electrical issues such as a blown fuse related to the sensor circuit.
  5. Impact or physical damage to the sensor or wiring.

Symptoms of C1949

  1. Illumination of the traction control or stability control warning light on the dashboard.
  2. Reduced traction or stability control functionality.
  3. Inaccurate or erratic readings on the vehicle's speedometer or odometer.
  4. Increased stopping distance or difficulty in maintaining control during sudden stops or turns.

How to Fix C1949

  1. Begin by conducting a visual inspection of the wiring and connectors in the accelerometer sensor circuit. Look for any signs of damage, corrosion, or loose connections.
  2. Test the accelerometer sensor using a multimeter to check for proper functionality. Replace the sensor if it is found to be faulty.
  3. Check and replace any blown fuses related to the sensor circuit.
  4. Clear the DTC from the vehicle's ECU using an OBD-II scanner after completing the repairs.
  5. Test drive the vehicle to ensure that the issue has been resolved and that all systems are functioning correctly.

Cost to Fix C1949

The cost of repairing the accelerometer sensor circuit open issue can vary depending on the specific cause of the problem and the cost of parts and labor in your area. On average, the repair for this issue could range from $200 to $500, including parts and labor. However, it's recommended to get a detailed quote from a local auto repair shop to get a more accurate estimate based on your vehicle make and model, as well as any additional factors that may affect the repair process. Remember that rates can vary between different repair shops, so it's advisable to shop around for the best price.

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Code C1949 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 C1949 Code

1. What are the common symptoms of OBDII code C1949 (Accelerometer Sensor Circuit Open)?

- Common symptoms include the ABS warning light coming on, traction control system malfunctions, and potential issues with the vehicle stability control.

2. What does the OBDII code C1949 indicate?

- OBDII code C1949 indicates a fault in the accelerometer sensor circuit, specifically an open circuit.

3. What are the possible causes of OBDII code C1949?

- Possible causes include damaged wiring or connectors in the accelerometer sensor circuit, a faulty accelerometer sensor, or issues with the ABS module.

4. How can I diagnose the cause of OBDII code C1949?

- Diagnosing the cause typically involves inspecting the wiring and connectors in the accelerometer sensor circuit, testing the accelerometer sensor itself, and checking for any related ABS system faults.

5. Can I drive my vehicle with OBDII code C1949?

- It is not recommended to drive your vehicle with OBDII code C1949, as it can affect the proper functioning of important safety systems like ABS and traction control.

6. How can I repair OBDII code C1949?

- Repairing OBDII code C1949 may involve repairing or replacing damaged wiring or connectors, replacing the faulty accelerometer sensor, or addressing any issues with the ABS module.

7. Will resetting the OBDII code C1949 make it go away permanently?

- Resetting the code may temporarily clear the warning light, but if the underlying issue causing the code is not addressed, it is likely to return.

8. Are there any DIY fixes for OBDII code C1949?

- DIY fixes for this code may involve checking and repairing any visible wiring issues or connectors, but more complex repairs may require professional assistance.

9. How much does it typically cost to repair OBDII code C1949?

- The cost of repairing OBDII code C1949 can vary depending on the cause of the issue, but it may range from a few hundred to over a thousand dollars, including parts and labor.

10. Can OBDII code C1949 cause any safety concerns?

- Yes, OBDII code C1949 can potentially compromise the proper functioning of safety systems like ABS and traction control, so it is important to address the issue promptly to ensure safe driving conditions.

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