Engine-CodesGMC – P0880 2014 GMC Sierra

P0880 2014 GMC Sierra Code - Transmission Control Module Supply Voltage Circuit

Quick Answer

The P0880 code in a 2014 GMC Sierra indicates a problem with the Transmission Control Module (TCM) supply voltage circuit. Common causes include Faulty TCM power supply relay, Damaged wiring or connectors in the supply voltage circuit, Blown fuse related to the TCM. 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
P0880 2014 GMC Sierra indicates Transmission Control Module Supply Voltage Circuit.
Common causes
Common causes include Faulty TCM power supply relay, Damaged wiring or connectors in the supply voltage circuit, Blown fuse related to the TCM.
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.
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P0880 2014 GMC Sierra Description

The P0880 code in a 2014 GMC Sierra indicates a problem with the Transmission Control Module (TCM) supply voltage circuit. The TCM is a crucial component that controls the operation of the transmission system in the vehicle. The supply voltage circuit is responsible for providing the necessary power to the TCM to ensure proper functioning. When this circuit malfunctions, it can lead to issues with the transmission, causing poor performance, shifting problems, and potential safety concerns.

OBDII Code P0880 2014 GMC Sierra - Transmission Control Module Supply Voltage Circuit
P0880 2014 GMC Sierra Code - Transmission Control Module Supply Voltage Circuit

Common Causes of P0880 2014 GMC Sierra

  1. Faulty TCM power supply relay
  2. Damaged wiring or connectors in the supply voltage circuit
  3. Blown fuse related to the TCM
  4. Malfunctioning TCM
  5. Battery or alternator issues affecting the power supply to the TCM

Symptoms of P0880 2014 GMC Sierra

  1. Erratic shifting or slipping gears
  2. Harsh shifting or delayed engagement
  3. Transmission going into limp mode
  4. Check Engine Light illuminated
  5. Loss of power or acceleration

How to Fix P0880 2014 GMC Sierra

  1. Begin by performing a thorough inspection of the TCM power supply relay, wiring, and connectors to identify any visible damage.
  2. Check and replace any blown fuses related to the TCM supply voltage circuit.
  3. Test the TCM using a diagnostic scan tool to determine if it is functioning properly.
  4. If the TCM is found to be faulty, it may need to be replaced and reprogrammed.
  5. Clear the trouble codes from the vehicle's computer system and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0880 2014 GMC Sierra

The typical repair costs for addressing a P0880 code in a 2014 GMC Sierra can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to inquire about local rates to get a more accurate estimate for this repair. Labor rates generally range between $80 and $150 per hour, but rates can vary depending on the repair shop.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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