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Engine-Codes – Generic – C1305

C1305 Code - Longitudinal Accelerometer Signal Fault

Quick Answer

The C1305 diagnostic trouble code (DTC) specifically refers to a Longitudinal Accelerometer Signal Fault. Common causes include Faulty longitudinal accelerometer sensor, Wiring or connection issues in the longitudinal accelerometer circuit, Corrosion or damage to the sensor's connectors. 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
C1305 indicates Longitudinal Accelerometer Signal Fault .
Common causes
Common causes include Faulty longitudinal accelerometer sensor, Wiring or connection issues in the longitudinal accelerometer circuit, Corrosion or damage to the sensor's connectors.
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 06, 2024
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Code C1305 Description

The C1305 diagnostic trouble code (DTC) specifically refers to a Longitudinal Accelerometer Signal Fault. In modern vehicles, the longitudinal accelerometer is a crucial component of the vehicle's stability control system, also known as Electronic Stability Control (ESC) or Vehicle Stability Control (VSC). This system helps to prevent skidding or loss of control by monitoring the vehicle's acceleration and deceleration. The longitudinal accelerometer measures the vehicle's acceleration or deceleration in the direction of travel.

OBDII Code C1305 - Longitudinal Accelerometer Signal Fault
C1305 Code - Longitudinal Accelerometer Signal Fault

Common Causes of C1305

  1. Faulty longitudinal accelerometer sensor.
  2. Wiring or connection issues in the longitudinal accelerometer circuit.
  3. Corrosion or damage to the sensor's connectors.
  4. Electronic control unit (ECU) malfunction affecting the longitudinal accelerometer signal.
  5. Vehicle impact or collision causing damage to the longitudinal accelerometer or its components.

Symptoms of C1305

  1. Illumination of the traction control or stability control warning light on the dashboard.
  2. Increased tendency for the vehicle to skid or slide, especially during acceleration or deceleration.
  3. Difficulty maintaining control of the vehicle on slippery or uneven road surfaces.
  4. ABS (Anti-lock Braking System) may not function properly, leading to longer stopping distances.
  5. The vehicle may feel unstable or unpredictable while driving, especially at higher speeds.

How to Fix C1305

  1. Begin by performing a thorough diagnostic scan of the vehicle's onboard computer to retrieve the specific error codes and confirm the Longitudinal Accelerometer Signal Fault.
  2. Inspect the wiring, connectors, and sensor of the longitudinal accelerometer for any visible damage, corrosion, or loose connections. Repair or replace any damaged components as needed.
  3. Test the longitudinal accelerometer sensor to ensure it is functioning correctly. If necessary, replace the sensor with a new one.
  4. Clear the error codes from the vehicle's computer and perform a test drive to verify that the issue has been resolved and the stability control system is functioning properly.
  5. If the problem persists, further diagnostics may be required to identify any underlying issues with the vehicle's stability control system or other related components.

Cost to Fix C1305

The typical repair costs for addressing a Longitudinal Accelerometer Signal Fault can vary depending on the specific cause of the issue and the extent of repairs needed. In general, the cost of replacing a faulty longitudinal accelerometer sensor can range from $200 to $500, including parts and labor. Additional costs may apply if wiring repairs or ECU diagnostics are necessary.

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Code C1305 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.

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