C1256 GMC Code - EBCM Internal Malfunction
Quick Answer
The Electronic Brake Control Module (EBCM) has identified an internal malfunction and have set the OBDII code. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) 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
- C1256 GMC indicates EBCM Internal Malfunction.
- Common causes
- Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module (EBCM) harness is open or shorted, Electronic Brake Control Module (EBCM) 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.
Code C1256 GMC Description
What are the Possible Causes of the DTC C1256 GMC?
- Faulty Electronic Brake Control Module (EBCM)
- Electronic Brake Control Module (EBCM) harness is open or shorted
- Electronic Brake Control Module (EBCM) circuit poor electrical connection
How to Fix the DTC C1256 GMC?
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 C1256 GMC 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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Frequently Asked Questions about C1256 GMC Code
1. What does the OBDII code C1256 mean on a GMC vehicle?
The code C1256 indicates an "EBCM Internal Malfunction," meaning there is an issue with the Electronic Brake Control Module (EBCM).
2. What are the common symptoms of code C1256 in a GMC?
Common symptoms include the ABS warning light being illuminated, reduced or no ABS functionality, and possible braking system performance issues.
3. What causes the C1256 code to appear in a GMC?
The most common causes are internal failures within the EBCM, poor electrical connections, wiring issues, or damaged circuits in the ABS system.
4. Can I still drive my GMC if code C1256 is active?
Yes, you can drive the vehicle, but the ABS system may not function properly, which could impact braking performance in slippery conditions.
5. How do you diagnose a C1256 code on a GMC?
A mechanic will use a scan tool to confirm the code, inspect the EBCM and associated wiring, check for loose connections, and test the EBCM for proper functionality.
6. Is it possible to fix code C1256 without replacing the EBCM?
In some cases, the issue may be resolved by repairing or tightening loose electrical connections or replacing damaged wiring. However, a faulty EBCM will typically require replacement.
7. How much does it cost to repair a GMC with a C1256 code?
Repair costs can vary widely, but replacing the EBCM typically costs between $800 and $1,500, including parts and labor.
8. Can a low battery voltage trigger the C1256 code on a GMC?
Yes, low or fluctuating battery voltage can sometimes cause electronic control modules, including the EBCM, to malfunction.
9. Does the C1256 code affect the traction control system on a GMC?
Yes, since the EBCM is integral to both the ABS and traction control systems, a malfunction can disable traction control.
10. How can I prevent the C1256 code from occurring on my GMC?
Regular maintenance of the braking system, ensuring good electrical connections, and addressing any ABS-related warning lights promptly can help prevent this issue.
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