AutoCodes – GMC – P2720 2017 GMC Sierra

P2720 2017 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 2017 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 228

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 2017 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 2017 GMC Sierra - Pressure Control Solenoid 4 Control Circuit Low Voltage - AutoCodes.com — P2720 2017 GMC Sierra Code - Pressure Control Solenoid 4 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2720 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code

1. What are the common symptoms of OBDII code P2720 on a 2017 GMC Sierra?

- Common symptoms include rough shifting, transmission slipping, poor fuel efficiency, and illuminated Check Engine light.

2. What does the OBDII code P2720 "Pressure Control Solenoid 4 Control Circuit Low Voltage" mean for a 2017 GMC Sierra?

- This code indicates that the vehicle's engine control module (ECM) has detected low voltage in the control circuit of Pressure Control Solenoid 4.

3. What are the possible causes of OBDII code P2720 on a 2017 GMC Sierra?

- Possible causes include faulty pressure control solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid level, or a malfunctioning ECM.

4. How can I diagnose the cause of OBDII code P2720 on my 2017 GMC Sierra?

- Diagnose by checking the transmission fluid level, inspecting the wiring and connectors related to the pressure control solenoid, and using a scan tool to monitor solenoid operation.

5. Can I continue driving my 2017 GMC Sierra with OBDII code P2720 present?

- It is not recommended to drive with this code present, as it can lead to further damage to the transmission and other components. Prompt diagnosis and repair are advised.

6. How can I repair OBDII code P2720 on a 2017 GMC Sierra?

- Repair involves addressing the root cause, such as replacing the pressure control solenoid, repairing damaged wiring, topping up transmission fluid, or reprogramming the ECM.

7. Is it possible to clear OBDII code P2720 on a 2017 GMC Sierra without fixing the issue?

- Clearing the code without fixing the underlying problem may temporarily turn off the Check Engine light, but the issue will persist and likely trigger the code again in the future.

8. How much does it cost to repair OBDII code P2720 on a 2017 GMC Sierra?

- Repair costs can vary depending on the exact cause of the issue, but expenses may include parts such as the pressure control solenoid, labor for diagnosis and repair, and any necessary fluid replenishment.

9. Can a DIY enthusiast fix OBDII code P2720 on a 2017 GMC Sierra?

- While some aspects of diagnosis and repair may be tackled by experienced DIYers, addressing this code often requires specialized tools and knowledge, making professional assistance advisable.

10. How can I prevent OBDII code P2720 from recurring on my 2017 GMC Sierra?

- Regular maintenance, including checking transmission fluid levels, inspecting wiring for damage, and promptly addressing any related issues, can help prevent the reoccurrence of this code.