AutoCodes – Generic – C1784

C1784 Code - Steering Angle Sensor Communication Error

Quick Answer

The steering sensor signal is sent to the Suspension Control ECU through the CAN communication system. Common causes include Faulty Steering Angle Sensor, Steering Angle Sensor harness is open or shorted, Steering Angle Sensor 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: C1784 indicates Steering Angle Sensor Communication Error.
Common causes: Common causes include Faulty Steering Angle Sensor, Steering Angle Sensor harness is open or shorted, Steering Angle Sensor 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 2,331

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 Nov 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1784 Description

The steering sensor signal is sent to the Suspension Control ECU through the CAN communication system. When there is a communication malfunction, it will be detected by the diagnosis function.

OBDII Code C1784 - Steering Angle Sensor Communication Error - AutoCodes.com — C1784 Code - Steering Angle Sensor Communication Error

What does this mean?

What are the Possible Causes of the DTC C1784?

Faulty Steering Angle Sensor
Steering Angle Sensor harness is open or shorted
Steering Angle Sensor circuit poor electrical connection
Faulty Suspension Control ECU

How to Fix the DTC C1784?

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 C1784 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 C1784 code?

Need more information on how to fix the C1784 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1784 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1784 Lexus — Steering Angle Sensor Communication Error
C1784 Toyota — Steering Angle Sensor Communication Error

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 C1784 Code

1. What are common symptoms of OBDII code C1784, Steering Angle Sensor Communication Error?

The common symptoms include the traction control light or stability control light coming on, difficulty steering, and inaccurate readings on the steering wheel position.

2. What can cause the OBDII code C1784 to trigger a Steering Angle Sensor Communication Error?

Possible causes include a faulty steering angle sensor, damaged wiring or connectors related to the sensor, or a communication issue between the sensor and the vehicle's onboard computer.

3. How can I diagnose the OBDII code C1784, Steering Angle Sensor Communication Error?

Diagnosis typically involves using a scan tool to read the code, checking the wiring and connectors for damage, and testing the steering angle sensor for proper operation.

4. Can I still drive my vehicle with the OBDII code C1784, Steering Angle Sensor Communication Error?

It is not recommended to drive the vehicle with this error code present, as it can affect the stability and control systems of the vehicle, potentially compromising safety.

5. How can I repair the OBDII code C1784, Steering Angle Sensor Communication Error?

Repair options may include replacing the steering angle sensor, repairing or replacing damaged wiring or connectors, and resetting the error code with a scan tool after the issue is fixed.

6. Is it possible to reset the OBDII code C1784, Steering Angle Sensor Communication Error without fixing the underlying issue?

While you can clear the error code with a scan tool, it is crucial to address the root cause of the problem to prevent the code from reappearing and ensure proper vehicle operation.

7. Are there any DIY repair tips for resolving the OBDII code C1784, Steering Angle Sensor Communication Error?

DIY repair tips may include checking and cleaning the sensor connectors, inspecting for loose or damaged wiring, and following manufacturer-specific diagnostic procedures outlined in the service manual.

8. How much does it typically cost to repair the OBDII code C1784, Steering Angle Sensor Communication Error at a mechanic or dealership?

The cost of repair can vary depending on the specific cause of the issue, but it may range from a couple of hundred dollars to over a thousand dollars, including parts and labor.

9. Can a Steering Angle Sensor Communication Error impact the overall performance of my vehicle?

Yes, this error can impact the vehicle's stability control system, traction control system, and overall handling, potentially affecting the safety and drivability of the vehicle.

10. How often does the OBDII code C1784, Steering Angle Sensor Communication Error occur in vehicles?

The occurrence of this error can vary depending on the vehicle make and model, but it is not uncommon in vehicles equipped with electronic stability control systems that rely on accurate steering angle sensor data.