C1220 2016 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 2016 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 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra code?
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Frequently Asked Questions about C1220 2016 GMC Sierra Code
What does the OBDII code C1220 mean on a 2016 GMC Sierra?
The C1220 code indicates a fault in the Brake Pressure Sensor Supply Voltage Circuit, specifically a high voltage issue.
What are the common symptoms of code C1220 in a 2016 GMC Sierra?
Symptoms may include an illuminated ABS warning light, reduced braking performance, and loss of ABS functionality.
What causes the C1220 code to appear?
Common causes include a faulty brake pressure sensor, damaged wiring or connectors, or a malfunctioning ABS module.
Can I drive my 2016 GMC Sierra with the C1220 code active?
Driving is possible, but it’s not recommended as the ABS system may not function correctly, increasing the risk of skidding during hard braking.
How do I diagnose the C1220 code on my GMC Sierra?
Start by inspecting the brake pressure sensor, connectors, and wiring for damage, followed by scanning live data from the ABS module using a diagnostic tool.
What tools are needed to repair the C1220 code?
You’ll typically need a multimeter, an OBDII scanner with ABS capabilities, and possibly replacement components like a brake pressure sensor.
How much does it cost to fix the C1220 code on a 2016 GMC Sierra?
Repair costs vary but may range from $150 to $500 depending on whether the issue involves sensor replacement or wiring repairs.
Can a weak battery cause the C1220 code?
While unlikely, a weak battery or charging system issue could potentially affect the ABS module’s electrical performance.
Do I need to reprogram anything after fixing the C1220 code?
In most cases, no reprogramming is needed, but you may need to clear the code with a scanner and perform an ABS system recalibration if required.
How can I prevent the C1220 code from recurring?
Regularly inspect and maintain the ABS wiring and sensors, and address any electrical issues in the braking system promptly.
Discuss the causes and fixes for C1220 2016 GMC Sierra OBDII Code
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