C1220 2018 GMC Sierra Code - Brake Pressure Sensor Supply Voltage Circuit High
Quick Answer
The Electronic Brake Control Module uses inputs from the Electronic Brake Control Brake Pedal Position Sensor to determine when the brake is applied and how much force is used. Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module 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
- C1220 2018 GMC Sierra indicates Brake Pressure Sensor Supply Voltage Circuit High.
- Common causes
- Common causes include Faulty Electronic Brake Control Module (EBCM), Electronic Brake Control Module harness is open or shorted, Electronic Brake Control Module 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 C1220 2018 GMC Sierra Description
Brake pressure sensor information is communicated from the Electronic Brake Control Module (EBCM) to the Hybrid Control Processor (HCP). This information is used to schedule regenerative braking and engine autostops.
The Diagnostic Trouble Code (DTC) will be set when the Engine Control Module (ECM) detects a corrupted data message from the Electronic Brake Control Module.
What are the Possible Causes of the DTC C1220 2018 GMC Sierra?
- Faulty Electronic Brake Control Module (EBCM)
- Electronic Brake Control Module harness is open or shorted
- Electronic Brake Control Module circuit poor electrical connection
- Faulty Starter/Generator Control Module
How to Fix the DTC C1220 2018 GMC Sierra?
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 C1220 2018 GMC Sierra 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 C1220 2018 GMC Sierra code?
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Frequently Asked Questions about C1220 2018 GMC Sierra Code
What does the OBDII code C1220 mean for a 2018 GMC Sierra?
C1220 indicates a problem with the brake pressure sensor supply voltage circuit, specifically a high voltage condition detected by the system.
What are common symptoms of the C1220 code in a 2018 GMC Sierra?
Symptoms may include illuminated ABS or traction control warning lights, reduced braking performance, or inconsistent brake pedal feel.
What causes the C1220 code to appear in a 2018 GMC Sierra?
Causes can include a faulty brake pressure sensor, damaged wiring or connectors in the sensor circuit, or issues with the ABS control module.
Can C1220 affect the safety of my 2018 GMC Sierra?
Yes, the code can impact braking system performance and stability control, potentially compromising vehicle safety.
How can I diagnose the C1220 code in my 2018 GMC Sierra?
Start by inspecting the brake pressure sensor, wiring, and connectors for damage. Use a multimeter to check for proper voltage and continuity.
Can I continue driving my 2018 GMC Sierra with the C1220 code?
It is not recommended to drive with this code active because it may affect braking and stability control, increasing the risk of an accident.
How do I fix the C1220 code on a 2018 GMC Sierra?
Repairs may involve replacing the brake pressure sensor, repairing damaged wiring, or reprogramming or replacing the ABS control module.
How much does it cost to repair the C1220 code in a 2018 GMC Sierra?
Repair costs vary, but replacing a brake pressure sensor typically costs $100-$300, while ABS module repairs can cost $500-$1,000.
Can a weak battery cause the C1220 code in a 2018 GMC Sierra?
Yes, a weak or failing battery can cause electrical inconsistencies that trigger this code. Ensure the battery voltage is within the recommended range.
Do I need to reset the code after fixing the issue?
Yes, after repairs, use an OBDII scanner to clear the code and confirm that the issue has been resolved.
Discuss the causes and fixes for C1220 2018 GMC Sierra OBDII Code
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