AutoCodes – GMC – P2720 2016 GMC Sierra

P2720 2016 GMC Sierra Code - Pressure Control Solenoid 4 Control Circuit Low Voltage

Quick Answer

The pressure control solenoid 4 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Control Solenoid Valve Assembly. 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: P2720 2016 GMC Sierra indicates Pressure Control Solenoid 4 Control Circuit Low Voltage.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Control Solenoid Valve Assembly.
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.

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Code Popularity 164

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2720 2016 GMC Sierra Description

The pressure control solenoid 4 is part of the control solenoid valve assembly which has no serviceable parts. The normally low-pressure control solenoid 4 regulates and directs oil pressure to the 2-6 clutch regulator valve. Increasing pressure control solenoid 4 pressure increases pressure to the 2-6 clutch regulator valve. The Transmission Control Module (TCM) varies the current to the pressure control solenoid 4 through a low-side driver. Increasing the current to pressure control solenoid 4 increases oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to pressure control solenoid 4 decreases oil pressure by opening the exhaust port. Pressure control solenoid 4 power is supplied by the Transmission Control Module through a high side driver. The high-side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected the high-side driver will reset.
The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module detects a short to ground on the pressure control solenoid 4 control circuit for 1 s.

OBDII Code P2720 2016 GMC Sierra - Pressure Control Solenoid 4 Control Circuit Low Voltage - AutoCodes.com — P2720 2016 GMC Sierra Code - Pressure Control Solenoid 4 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2720 2016 GMC Sierra?

Low transmission fluid level
Dirty transmission fluid
Faulty Control Solenoid Valve Assembly
Control Solenoid Valve Assembly harness or connectors
Control Solenoid Valve Assembly circuit is open or shorted

How to Fix the DTC P2720 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 P2720 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 P2720 2016 GMC Sierra code?

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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.

Frequently Asked Questions about P2720 2016 GMC Sierra Code

What does the OBDII code P2720 mean on a 2016 GMC Sierra?

P2720 indicates a "Pressure Control Solenoid 4 Control Circuit Low Voltage," meaning the transmission control module (TCM) has detected a low voltage issue in the circuit controlling solenoid 4.

What are the symptoms of code P2720 in a 2016 GMC Sierra?

Common symptoms include harsh or delayed shifting, transmission slipping, poor acceleration, decreased fuel efficiency, or the vehicle entering limp mode.

What causes the P2720 code to appear on a 2016 GMC Sierra?

Potential causes include a faulty pressure control solenoid 4, wiring or connector issues (corrosion or damage), low transmission fluid, or a malfunctioning TCM.

Can driving with the P2720 code damage my 2016 GMC Sierra?

Yes, prolonged driving with this issue could lead to further transmission damage, reduced performance, and more costly repairs.

How do I diagnose the P2720 code on a 2016 GMC Sierra?

Start by checking the transmission fluid level and condition. Next, inspect the wiring and connectors for damage or corrosion. If no issues are found, test the solenoid and TCM functionality.

What tools are needed to troubleshoot the P2720 code?

Youâ€™ll need an OBDII scanner, a multimeter to check voltage, and possibly a transmission pressure tester for a more detailed diagnosis.

How much does it cost to repair a P2720 code on a 2016 GMC Sierra?

Repairs can range from $100 to $500, depending on whether the issue is a wiring repair, solenoid replacement, or TCM reprogramming.

Can low transmission fluid cause the P2720 code on a 2016 GMC Sierra?

Yes, low or contaminated transmission fluid can lead to improper solenoid operation and trigger the P2720 code.

Is it possible to fix the P2720 code on a 2016 GMC Sierra without replacing parts?

In some cases, cleaning corroded connectors, repairing damaged wiring, or reprogramming the TCM can resolve the issue without replacing parts.

When should I consult a professional for the P2720 code on my 2016 GMC Sierra?

If basic checks like fluid level, wiring inspection, or simple repairs donâ€™t resolve the issue, consult a professional to avoid further damage or misdiagnosis.