AutoCodes – Generic – C1305

C1305 Code - Longitudinal Accelerometer Signal Fault

Quick Answer

The longitudinal accelerometer is contained in the sensor cluster. Common causes include Faulty Accelerometer/Sensor Cluster, Accelerometer/Sensor Cluster harness is open or shorted, Accelerometer/Sensor Cluster circuit poor electrical connection. 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 Accelerometer/Sensor Cluster, Accelerometer/Sensor Cluster harness is open or shorted, Accelerometer/Sensor Cluster circuit poor electrical connection.
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.

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Code Popularity 3,426

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code C1305 Description

The longitudinal accelerometer is contained in the sensor cluster. The sensor cluster measures the vehicle acceleration and deceleration and then sends the signal over the controller area network (CAN) communication lines to the Anti-Lock Brake System (ABS) module. Voltage is supplied by the circuit. The ground is provided through the circuit. The CAN communication is transmitted through the circuit.

OBDII Code C1305 - Longitudinal Accelerometer Signal Fault - AutoCodes.com — C1305 Code - Longitudinal Accelerometer Signal Fault

What does this mean?

What are the Possible Causes of the DTC C1305?

Faulty Accelerometer/Sensor Cluster
Accelerometer/Sensor Cluster harness is open or shorted
Accelerometer/Sensor Cluster circuit poor electrical connection
Faulty Anti-Lock Brake System (ABS) Module

How to Fix the DTC C1305?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the C1305 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the C1305 code?

Need more information on how to fix the C1305 code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific Makes

C1305 Ford — Longitudinal Accelerometer Signal Fault
C1305 Lincoln — Longitudinal Accelerometer Signal Fault
C1305 Mercury — Longitudinal Accelerometer Signal Fault

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.