C1250 Code - Left Rear ISO Valve Circuit Failure
Quick Answer
The C1250 code indicates a failure in the left rear ISO valve circuit of the vehicle's braking system. Common causes include Electrical wiring or connector issues in the left rear ISO valve circuit, Malfunctioning ISO valve solenoid, Corrosion or damage to the ISO valve components. 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 indicates Left Rear ISO Valve Circuit Failure.
- Common causes
- Common causes include Electrical wiring or connector issues in the left rear ISO valve circuit, Malfunctioning ISO valve solenoid, Corrosion or damage to the ISO valve components.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code C1250 Description
The C1250 code indicates a failure in the left rear ISO valve circuit of the vehicle's braking system. The ISO valve is responsible for regulating the pressure of the brake fluid in the rear brakes, ensuring proper braking performance and stability. When this valve circuit fails, it can lead to issues with braking efficiency, potentially causing safety concerns while driving. If not addressed promptly, this issue can result in uneven braking, increased stopping distances, and potential loss of control over the vehicle.
Common Causes of C1250
- Electrical wiring or connector issues in the left rear ISO valve circuit
- Malfunctioning ISO valve solenoid
- Corrosion or damage to the ISO valve components
- Faulty ABS control module
- Low brake fluid level or contaminated brake fluid
Symptoms of C1250
- Illumination of the ABS warning light on the dashboard
- Increased brake pedal travel or soft brake pedal feel
- Uneven braking performance, with one rear wheel locking up
- ABS system activation during normal braking conditions
- Decreased overall braking effectiveness
How to Fix C1250
- Begin by conducting a visual inspection of the wiring harness and connectors in the left rear ISO valve circuit to check for any damage or corrosion.
- Test the ISO valve solenoid for proper operation using a multimeter to measure resistance and voltage.
- Check the ABS control module for any fault codes and reset if necessary.
- Inspect the brake fluid level and quality, topping up or flushing the system if needed.
- Clear the diagnostic trouble codes from the vehicle's system and test drive to verify that the issue has been resolved.
Cost to Fix C1250
The typical repair costs for addressing a C1250 code related to a left rear ISO valve circuit failure can range from $200 to $500, including parts and labor. However, actual costs may vary depending on the specific vehicle make and model, as well as the location and labor rates of the auto repair shop. It's recommended to obtain a detailed quote from a trusted mechanic or dealership for a more accurate estimate.
Need more information about the C1250 code?
Need more information on how to fix the C1250 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the C1250 code diagnosed by a professional: Find a repair shop in your area
Code C1250 Information for Specific Makes
- C1250 Buick — Lateral Acceleration Sensor Circuit High Voltage
- C1250 Cadillac — Lateral Acceleration Sensor Circuit High Voltage
- C1250 Chevrolet — Lateral Acceleration Sensor Circuit High Voltage
- C1250 Ford — Left Rear ISO Valve Circuit Failure
- C1250 GMC — Lateral Acceleration Sensor Circuit High Voltage
- C1250 Lincoln — Left Rear ISO Valve Circuit Failure
- C1250 Mazda — Left Right ABS Pressure Retention Solenoid Valve
- C1250 Mercury — Left Rear ISO Valve Circuit Failure
Frequently Asked Questions about C1250 Code
1. What are common symptoms of OBDII code C1250 (Left Rear ISO Valve Circuit Failure)?
- Common symptoms include the traction control light or ABS light illuminating on the dashboard, poor handling or braking performance, and possible vehicle stability issues.
2. What are the potential causes of OBDII code C1250?
- The code C1250 may be triggered by a faulty left rear ISO valve, damaged wiring or connectors related to the valve, or issues with the ABS module.
3. How can I diagnose the cause of OBDII code C1250?
- Diagnosing the code typically involves using a diagnostic scanner to retrieve the specific fault codes, conducting a visual inspection of the left rear ISO valve and its wiring, and performing electrical tests to check for continuity and proper voltage.
4. Can I continue driving with OBDII code C1250 present?
- It is not recommended to continue driving with OBDII code C1250 active, as it can affect the vehicle's stability and braking performance. It is advisable to address the issue promptly.
5. How can I repair OBDII code C1250 (Left Rear ISO Valve Circuit Failure)?
- Repairing the code C1250 may involve replacing the left rear ISO valve, repairing or replacing damaged wiring or connectors, and resetting the fault codes using a diagnostic scanner.
6. Are there any DIY tips for addressing OBDII code C1250?
- DIY tips include checking for loose or damaged wiring around the left rear ISO valve, ensuring proper connections, and consulting the vehicle's service manual for specific troubleshooting steps.
7. Can weather or road conditions trigger OBDII code C1250?
- Harsh weather conditions or rough road surfaces can potentially contribute to triggering code C1250 by putting additional stress on the ABS system components.
8. How much does it typically cost to repair OBDII code C1250?
- The cost of repairing OBDII code C1250 can vary depending on the specific cause of the issue, but it may range from a few hundred to a few thousand dollars, including parts and labor.
9. Will OBDII code C1250 cause my vehicle to fail an emissions test?
- OBDII code C1250 is related to the ABS system and is not directly linked to emissions control. However, it is still important to address the issue to ensure safe vehicle operation.
10. Is it possible for OBDII code C1250 to reoccur after repair?
- If the underlying issue causing code C1250 is not properly addressed during the repair process, there is a possibility that the code may reoccur. It is crucial to diagnose and fix the root cause to prevent this.
Discuss the causes and fixes for C1250 OBDII Code
Code C1250 comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.