AutoCodes – Ford – C1250 Ford

C1250 Ford Code - Left Rear ISO Valve Circuit Failure

Quick Answer

The Anti-Lock Brake System (ABS) Module monitors the Left Rear ISO Valve. Common causes include Faulty Left Rear ISO Valve, Left Rear ISO Valve harness is open or shorted, Left Rear ISO 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: C1250 Ford indicates Left Rear ISO Valve Circuit Failure.
Common causes: Common causes include Faulty Left Rear ISO Valve, Left Rear ISO Valve harness is open or shorted, Left Rear ISO 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 3,148

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 30, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1250 Ford Description

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

OBDII Code C1250 Ford - Left Rear ISO Valve Circuit Failure - AutoCodes.com — C1250 Ford Code - Left Rear ISO Valve Circuit Failure

What does this mean?

What are the Possible Causes of the DTC C1250 Ford?

Faulty Left Rear ISO Valve
Left Rear ISO Valve harness is open or shorted
Left Rear ISO Valve circuit poor electrical connection

How to Fix the DTC C1250 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 C1250 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.

Need more information about the C1250 Ford code?

Need more information on how to fix the C1250 Ford code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 C1250 Ford Code

What does the OBDII code C1250 mean for a Ford vehicle?

C1250 refers to a "Left Rear ISO Valve Circuit Failure," indicating an issue with the ISO valve circuit related to the left rear wheel, which can affect the vehicle's braking system.

What are the common symptoms of a C1250 code?

Symptoms may include the illumination of the ABS or brake warning light, decreased braking performance, or unusual sounds from the braking system when the vehicle is in operation.

What could cause a C1250 code to trigger?

Causes may include a faulty ISO valve, damaged wiring or connectors in the circuit, a malfunctioning ABS module, or issues with the brake control system.

How can I diagnose the C1250 code?

Start by scanning the vehicle with an OBDII scanner to confirm the code. Then, inspect the wiring and connectors for damage, check the ISO valve for proper operation, and test the ABS module for faults.

What repairs are typically needed to fix a C1250 code?

Repairs may involve replacing the faulty ISO valve, repairing or replacing damaged wiring or connectors, or in some cases, replacing the ABS module if it's determined to be defective.

Can I drive my vehicle with a C1250 code?

While you can drive with this code, it is not advisable as it may compromise braking performance and safety. It's best to address the issue promptly.

Is there a way to reset the C1250 code after repairs?

Yes, you can reset the code using an OBDII scanner. However, ensure that the underlying issue is resolved before clearing the code to avoid reoccurrence.

How much does it typically cost to repair a C1250 code?

Repair costs can vary widely depending on the specific issue, but it may range from $100 to $500 or more, depending on whether parts need to be replaced or if extensive labor is required.

Can a C1250 code affect other systems in the vehicle?

Yes, since the ISO valve is part of the braking system, issues with this code can lead to problems with ABS functionality and overall braking safety, potentially affecting other related systems.

Are there any preventive measures to avoid a C1250 code?

Regular maintenance of the braking system, including inspections of wiring and connectors, can help prevent issues that may lead to a C1250 code. Keeping the ABS system serviced can also be beneficial.