AutoCodes – Generic – C1198

C1198 Code - ABS Front Left Isolation Valve Circuit Failure

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the ABS Front Left Isolation Valve. Common causes include Faulty ABS Front Left Isolation Valve, ABS Front Left Isolation Valve harness is open or shorted, ABS Front Left Isolation Valve 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: C1198 indicates ABS Front Left Isolation Valve Circuit Failure.
Common causes: Common causes include Faulty ABS Front Left Isolation Valve, ABS Front Left Isolation Valve harness is open or shorted, ABS Front Left Isolation Valve 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 34,989

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 Aug 20, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1198 Description

The Anti-Lock Brake System (ABS) Module monitors the ABS Front Left Isolation Valve. The ABS Module sets the OBDII code when the ABS Front Left Isolation Valve is not to factory specifications.

OBDII Code C1198 - ABS Front Left Isolation Valve Circuit Failure - AutoCodes.com — C1198 Code - ABS Front Left Isolation Valve Circuit Failure

What does this mean?

What are the Possible Causes of the DTC C1198?

Faulty ABS Front Left Isolation Valve
ABS Front Left Isolation Valve harness is open or shorted
ABS Front Left Isolation Valve circuit poor electrical connection

How to Fix the DTC C1198?

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 C1198 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 C1198 code?

Need more information on how to fix the C1198 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1198 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

C1198 Ford — ABS Front Left Isolation Valve Circuit Failure
C1198 Lincoln — ABS Front Left Isolation Valve Circuit Failure
C1198 Mercury — ABS Front Left Isolation Valve Circuit Failure

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 C1198 Code

1. What are the common symptoms of OBDII code C1198 related to ABS Front Left Isolation Valve Circuit Failure?

- Common symptoms include the ABS warning light illuminating on the dashboard, loss of ABS functionality, and potential issues with braking performance.

2. What are the possible causes of OBDII code C1198 indicating ABS Front Left Isolation Valve Circuit Failure?

- The code may be triggered by a faulty isolation valve, damaged wiring or connectors, a malfunctioning ABS control module, or issues with the vehicle's wheel speed sensors.

3. How can I diagnose the ABS Front Left Isolation Valve Circuit Failure related to code C1198?

- Diagnosis typically involves using a professional OBDII scanner to retrieve the code, conducting a visual inspection of the ABS components, checking the wiring and connectors, and performing tests on the isolation valve and related circuitry.

4. Is it safe to drive with OBDII code C1198 indicating ABS Front Left Isolation Valve Circuit Failure?

- It is not recommended to drive with this code active, as it can affect the proper functioning of the ABS system, potentially leading to compromised braking performance in emergency situations.

5. What are some repair tips for addressing OBDII code C1198 related to ABS Front Left Isolation Valve Circuit Failure?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the faulty isolation valve, resetting the ABS system, and ensuring proper installation of new components.

6. Can a DIY enthusiast fix OBDII code C1198 indicating ABS Front Left Isolation Valve Circuit Failure?

- While some basic diagnostic steps can be performed by a DIY enthusiast, fixing the underlying issue may require specialized tools and expertise, so it is recommended to consult a professional mechanic for proper repair.

7. How much does it typically cost to repair OBDII code C1198 related to ABS Front Left Isolation Valve Circuit Failure?

- The cost of repair can vary depending on the exact cause of the issue, but it may involve expenses for parts replacement, labor costs, and potentially diagnostic fees, with an average range of $200 to $600.

8. Are there any preventive measures to avoid triggering OBDII code C1198 for ABS Front Left Isolation Valve Circuit Failure?

- Regular maintenance of the ABS system, including checking for any signs of wear or damage, can help prevent issues that may lead to the isolation valve circuit failure and subsequent OBDII code activation.