C1255 on 2020 CHEVROLET Corvette

The C1255 diagnostic trouble code in your 2020 Chevrolet Corvette can be frustrating. This code often points to issues within the ABS (Anti-lock Braking System). As one owner shared, "So today I got a c1255 error. The ABS kiss of death error." It’s crucial to address this promptly to ensure your vehicle's safety and performance. This guide will walk you through the possible causes, diagnosis, and solutions based on actual owner experiences.

How to Fix C1255

This guide provides a comprehensive overview of the C1255 diagnostic trouble code specifically for the 2020 Chevrolet Corvette. We'll explore potential causes, diagnostic steps, and repair solutions based on the experiences shared by other Corvette owners. This information will help you understand the problem and take the necessary steps to resolve it, whether you choose to tackle it yourself or seek professional help.

Symptoms

The primary symptom reported in connection with the C1255 code is related to the ABS system. The most direct indicator is the appearance of the C1255 error code itself, often accompanied by related ABS warnings or messages on the Driver Information Center (DIC).

Besides the error code, some owners have indirectly linked the code to other electrical anomalies. As one owner noted, "By chance did you install some LED lights? I had a couple weird issues when I changed over to LED bulbs both interior and exterior thru-out changing the incandescent bulbs." This suggests a possible connection between electrical modifications and the appearance of diagnostic trouble codes.

While not a direct symptom of the C1255 code, one owner experienced battery issues shortly before encountering the error. "I went out to the garage to pack for the event tomorrow and found acid leaking out from under the car. The battery was dripping out the passenger side only about a day and a half after I installed it," reported one owner. This incident underscores the importance of ensuring a healthy and properly functioning electrical system.

Additionally, the C1255 code can sometimes surface after recent work on the vehicle. For example, "All was working fine before I changed my battery. I went through and verified all my wiring was hooked back up at the wheel," shared one owner. This highlights the importance of double-checking all connections and components after performing maintenance or repairs.

Most Likely Cause

Based on the limited owner data available, the most likely cause of the C1255 code in the 2020 Chevrolet Corvette seems to be related to electrical issues or modifications, specifically with LED lights, or a low voltage condition caused by a faulty battery. The installation of aftermarket LED lights has been linked to electrical problems that can trigger diagnostic trouble codes. A failing or recently replaced battery also appears to be a potential trigger, possibly due to voltage fluctuations or improper installation that affects the ABS system's performance.

How to Diagnose

Diagnosing the C1255 code requires a systematic approach to pinpoint the root cause. Here’s a step-by-step process you can follow:

1. Retrieve the Code: Use an OBD-II scanner to confirm the presence of the C1255 code. Record any other related codes, as they can provide valuable clues.
2. Inspect Electrical Connections: Check all electrical connections related to the ABS system. Pay close attention to the wiring harness and connectors near the wheel speed sensors and the ABS control module. Look for signs of corrosion, damage, or loose connections.
3. Examine LED Lights (If Applicable): If you’ve recently installed LED lights, inspect them for proper installation and compatibility with your vehicle's electrical system. Ensure they have the correct resistors to prevent electrical interference.
4. Check the Battery: Verify the battery's voltage and condition. A weak or failing battery can cause a variety of electrical problems, including ABS errors. Have the battery load tested to determine its health.
5. Inspect Fuses: Check all fuses related to the ABS system and lighting circuits. A blown fuse can interrupt the electrical circuit and trigger the C1255 code.
6. Review Recent Work: If the code appeared after recent maintenance or repairs, double-check all work performed to ensure everything was properly reconnected and installed. One owner stated, "All was working fine before I changed my battery. I went through and verified all my wiring was hooked back up at the wheel."

Tool Requirements:

• OBD-II scanner
• Multimeter
• Socket set
• Wrench set
• Visual inspection tools (flashlight, magnifying glass)

Step-by-Step Fix

Based on the limited data and owner experiences, addressing the C1255 code primarily involves checking and correcting electrical issues. Here’s a step-by-step fix you can attempt:

1. Clear the Code: Using your OBD-II scanner, clear the C1255 code. This will allow you to see if the issue is resolved or if the code reappears.
2. Inspect and Replace Fuses: Check the fuses related to the ABS system. Replace any blown fuses with the correct amperage rating.
3. Check Battery Connections: Ensure the battery terminals are clean and securely connected. Remove any corrosion with a wire brush and tighten the connections.
4. Address LED Light Issues (If Applicable): If you have aftermarket LED lights, try replacing them with the original incandescent bulbs to see if the code disappears. As one owner shared, "Quick email to Cole @ Vettelights (awesome customer service) , with my problem, and I had a new LED 3rd light, with a resistor , in a couple days. No more codes, so far, fingers crossed." If the code clears after replacing the LEDs, the issue likely lies with the LED lights or their installation.
5. Verify Wiring and Grounds: Inspect the wiring harness and ground connections related to the ABS system. Ensure all connections are secure and free from corrosion. One owner mentioned, "I went through and verified all my wiring was hooked back up at the wheel. This afternoon I redid the ground over by the washer tank."
6. Test the Battery: Have your battery load tested to ensure it is providing the correct voltage. Replace the battery if it is weak or failing.
7. Professional Diagnosis: If the code persists after checking the above items, it is recommended to seek a professional diagnosis. A qualified technician can use specialized tools and diagnostic procedures to pinpoint the underlying cause and recommend appropriate repairs.

Parts and Tools Needed

• OBD-II scanner
• Multimeter
• Socket set
• Wrench set
• Visual inspection tools (flashlight, magnifying glass)
• Replacement fuses (various amperage ratings)
• Battery terminal cleaner
• Wire brush
• Replacement battery (if needed)
• LED bulbs with resistors (if applicable)
• Wiring connectors

Specific part numbers will vary depending on the exact components needed. Refer to your vehicle's owner's manual or consult with a parts specialist for accurate part numbers.

Real Owner Costs

Based on available data, costs associated with the C1255 code can vary widely depending on the underlying cause. Here are some possible cost scenarios:

• DIY Fix (LED Lights): If the issue is related to aftermarket LED lights, the cost could range from $20 to $100 for replacement bulbs or resistors.
• DIY Fix (Fuses and Connections): Replacing fuses and cleaning battery terminals can cost as little as $10 to $30.
• DIY Fix (Battery Replacement): Replacing a battery typically costs between $100 and $300, depending on the battery type and brand.
• Professional Diagnosis: A diagnostic fee at a repair shop can range from $80 to $150.
• ABS Module Repair/Replacement: If the ABS module is faulty, repair or replacement can be costly, ranging from $500 to $1500 or more.

Example 1 (LED Lights): An owner experienced the C1255 code after installing LED lights. After purchasing new LED lights with built-in resistors, the issue was resolved. Total cost: $50.

Example 2 (Battery): An owner encountered the code after a battery replacement. Cleaning the battery terminals and ensuring secure connections resolved the problem. Total cost: $15.

Example 3 (Professional Diagnosis): An owner was unable to resolve the code after basic troubleshooting and sought a professional diagnosis. The technician identified a faulty wheel speed sensor. Repair cost: $300 (including diagnosis and sensor replacement).

Prevention

Preventing the C1255 code involves maintaining a healthy electrical system and being mindful of aftermarket modifications. Here are some preventative measures you can take:

• Regular Battery Maintenance: Have your battery tested regularly and replace it when necessary. Clean battery terminals to prevent corrosion.
• Proper LED Light Installation: If you choose to install aftermarket LED lights, ensure they are compatible with your vehicle's electrical system and have the correct resistors to prevent interference.
• Careful Wiring Practices: When working on your vehicle's electrical system, follow proper wiring practices and ensure all connections are secure.
• Professional Installation: For complex electrical modifications, consider having a qualified technician perform the installation.
• Routine Inspections: Have your vehicle's electrical system inspected during routine maintenance to identify potential problems early on.

What Owners Say

Real experiences from CHEVROLET owners:

Success Stories

"Quick email to Cole @ Vettelights (awesome customer service) , with my problem, and I had a new LED 3rd light, with a resistor , in a couple days. No more codes, so far, fingers crossed." — Prop Joe (source)

Owner Experiences

"By chance did you install some LED lights? I had a couple weird issues when I changed over to LED bulbs both interior and exterior thru-out changing the incandescent bulbs." — Prop Joe (source)

"I went out to the garage to pack for the event tomorrow and found acid leaking out from under the car. The battery was dripping out the passenger side only about a day and a half after I installed it." — Midwayman (source)

"The battery was dripping out the passenger side only about a day and a half after I installed it. I stole one of my wife's baking soda packs out of the fridge and made a pot of baking soda slurry." — Midwayman (source)

FAQ

Q: How long does it take to fix the C1255 code?

A: The repair time can vary depending on the cause. A simple fix, like replacing a fuse, might take only 15 minutes. Replacing a battery could take 30 minutes to an hour. More complex issues, like a faulty ABS module, could take several hours or even days to diagnose and repair.

Q: Can I drive with the C1255 code?

A: It's generally not recommended to drive with the C1255 code, as it indicates a problem with the ABS system. A malfunctioning ABS can compromise your vehicle's braking performance and increase the risk of an accident, especially in emergency braking situations.

Q: Is this a common issue on the 2020 Chevrolet Corvette?

A: Based on available data, the C1255 code is not an extremely common issue, but it can occur. The prevalence may be influenced by factors such as aftermarket modifications and electrical system maintenance.

Q: DIY vs mechanic – what's recommended for fixing the C1255 code?

A: Whether you choose to DIY or hire a mechanic depends on your comfort level, experience, and the complexity of the repair. Simple fixes, like replacing fuses or cleaning battery terminals, can often be done DIY. However, if you're not comfortable working on your vehicle's electrical system or suspect a more complex issue, it's best to consult a qualified mechanic.