AutoCodes – Ford – C1203 Ford

C1203 Ford Code - ABS Rear Dump Valve Circuit Open

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the ABS Rear Dump Valve. Common causes include Faulty ABS Rear Dump Valve, ABS Rear Dump Valve harness is open or shorted, ABS Rear Dump 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: C1203 Ford indicates ABS Rear Dump Valve Circuit Open.
Common causes: Common causes include Faulty ABS Rear Dump Valve, ABS Rear Dump Valve harness is open or shorted, ABS Rear Dump 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 2,477

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 21, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1203 Ford Description

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

OBDII Code C1203 Ford - ABS Rear Dump Valve Circuit Open - AutoCodes.com — C1203 Ford Code - ABS Rear Dump Valve Circuit Open

What does this mean?

What are the Possible Causes of the DTC C1203 Ford?

Faulty ABS Rear Dump Valve
ABS Rear Dump Valve harness is open or shorted
ABS Rear Dump Valve circuit poor electrical connection

How to Fix the DTC C1203 Ford?

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 C1203 Ford 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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Need more information on how to fix the C1203 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1203 Ford code diagnosed by a professional: Find a repair shop in your area

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 C1203 Ford Code

1. What are the common symptoms of OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

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

2. What are the possible causes of OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

Possible causes include damaged wiring or connectors in the ABS system, a faulty rear dump valve, or issues with the ABS control module.

3. How can I diagnose OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

Diagnosis typically involves using a scan tool to retrieve the trouble codes, conducting a visual inspection of ABS system components, and testing the rear dump valve and related circuits for continuity and proper functioning.

4. Can I still drive my vehicle with OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

It is not recommended to drive the vehicle with this code present, as it may compromise the effectiveness of the ABS system and impact braking performance in certain situations.

5. How can I repair OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

Repair options may include repairing or replacing damaged wiring or connectors, replacing the rear dump valve, or addressing any issues with the ABS control module.

6. Are there any DIY tips for fixing OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

While some basic troubleshooting steps can be performed at home, it is advisable to consult a professional mechanic with experience in ABS system repairs for accurate diagnosis and proper repair.

7. How much does it cost to fix OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

The cost of fixing this code can vary depending on the specific cause of the issue, the required parts, and labor costs. It is recommended to obtain estimates from local repair shops for an accurate cost assessment.

8. Can OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open) cause other problems in the vehicle?

If left unresolved, this code can potentially lead to further damage to the ABS system, affect overall vehicle safety, and trigger additional warning lights or trouble codes.

9. Is it possible to prevent OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open) from occurring?

Regular maintenance of the ABS system, including checking for loose connections and damaged wiring, can help prevent issues that may trigger this trouble code.

10. How long does it typically take to repair OBDII code C1203 Ford (ABS Rear Dump Valve Circuit Open)?

The repair time can vary depending on the complexity of the issue, availability of parts, and the expertise of the mechanic. In some cases, repairs can be completed within a few hours, while more extensive issues may require additional time.