AutoCodes – Lexus – C1946 Lexus

C1946 Lexus Code - Malfunction In Signal From Steering Control ECU To Front Active Stabilizer Control ECU

Quick Answer

The Active Stabilizer Suspension System uses CAN communication to gather information necessary for control functions. Common causes include Faulty Front Active Stabilizer Control ECU, Front Active Stabilizer Control ECU harness is open or shorted, Front Active Stabilizer Control ECU 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: C1946 Lexus indicates Malfunction In Signal From Steering Control ECU To Front Active Stabilizer Control ECU.
Common causes: Common causes include Faulty Front Active Stabilizer Control ECU, Front Active Stabilizer Control ECU harness is open or shorted, Front Active Stabilizer Control ECU 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 806

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 Dec 05, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1946 Lexus Description

The Active Stabilizer Suspension System uses CAN communication to gather information necessary for control functions. When a malfunction occurs in another system, the Diagnostic Trouble Code (DTC) is stored.

OBDII Code C1946 Lexus - Malfunction In Signal From Steering Control ECU To Front Active Stabilizer Control ECU - AutoCodes.com — C1946 Lexus Code - Malfunction In Signal From Steering Control ECU To Front Active Stabilizer Control ECU

What does this mean?

What are the Possible Causes of the DTC C1946 Lexus?

Faulty Front Active Stabilizer Control ECU
Front Active Stabilizer Control ECU harness is open or shorted
Front Active Stabilizer Control ECU circuit poor electrical connection

How to Fix the DTC C1946 Lexus?

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 C1946 Lexus 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.

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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 C1946 Lexus Code

1. What are the common symptoms of OBDII code C1946 in a Lexus related to the malfunction in the signal from the Steering Control ECU to the Front Active Stabilizer Control ECU?

- Common symptoms include issues with the stability control system, steering responsiveness, and possibly illuminated warning lights on the dashboard.

2. What are the possible causes of OBDII code C1946 in a Lexus?

- Possible causes may include a faulty Steering Control ECU, a malfunctioning Front Active Stabilizer Control ECU, wiring problems, or communication errors between the two ECUs.

3. How can I diagnose OBDII code C1946 in a Lexus?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the specific fault code, inspecting the wiring connections between the Steering Control ECU and Front Active Stabilizer Control ECU, and potentially testing the functionality of the individual ECUs.

4. Is it safe to drive my Lexus with OBDII code C1946 present?

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

5. How can I repair OBDII code C1946 in a Lexus?

- Repair methods may involve replacing the faulty ECUs, repairing any damaged wiring, or addressing communication issues between the ECUs. It's recommended to consult a professional mechanic for accurate diagnosis and repair.

6. Can OBDII code C1946 be intermittent or sporadic in nature?

- Yes, this code can sometimes be intermittent, meaning the issue may come and go. It's essential to address the underlying problem even if the symptoms disappear temporarily.

7. Are there any DIY fixes for OBDII code C1946 in a Lexus?

- DIY fixes may include checking and ensuring all wiring connections are secure and free of corrosion. However, due to the complexity of the systems involved, professional diagnosis and repair are often necessary.

8. How long does it typically take to repair OBDII code C1946 in a Lexus?

- Repair times can vary depending on the exact cause of the issue and the availability of parts. It's best to consult with a mechanic for a more accurate estimate based on your specific situation.

9. Can OBDII code C1946 cause other problems in the vehicle?

- While the primary concern with this code is related to the steering and stability control systems, unresolved issues can potentially lead to other electrical or control system malfunctions in the vehicle.

10. Is it possible to prevent OBDII code C1946 from occurring in my Lexus?

- Preventive measures include regular vehicle maintenance, ensuring proper wiring connections, and addressing any warning lights or unusual symptoms promptly to prevent more significant issues.