AutoCodes – Chevrolet – P2721 2017 Chevrolet Silverado

P2721 2017 Chevrolet Silverado Code - Pressure Control Solenoid 4 Control Circuit High 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: P2721 2017 Chevrolet Silverado indicates Pressure Control Solenoid 4 Control Circuit High 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 432

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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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 P2721 2017 Chevrolet Silverado 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 an open or short to voltage on the pressure control solenoid 4 control circuit for 1 s.

OBDII Code P2721 2017 Chevrolet Silverado - Pressure Control Solenoid 4 Control Circuit High Voltage - AutoCodes.com — P2721 2017 Chevrolet Silverado Code - Pressure Control Solenoid 4 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2721 2017 Chevrolet Silverado?

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 P2721 2017 Chevrolet Silverado?

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 P2721 2017 Chevrolet Silverado 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 P2721 2017 Chevrolet Silverado 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 P2721 2017 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P2721 in a 2017 Chevrolet Silverado?

Common symptoms include harsh shifting, transmission slipping, decreased fuel efficiency, and illuminated Check Engine Light.

2. What could cause the Pressure Control Solenoid 4 Control Circuit High Voltage code (P2721) in a 2017 Chevrolet Silverado?

Potential causes include a faulty pressure control solenoid, damaged wiring or connectors, low transmission fluid level, or a malfunctioning transmission control module.

3. How can I diagnose the Pressure Control Solenoid 4 Control Circuit High Voltage code in my 2017 Chevrolet Silverado?

Diagnosis involves using a scan tool to retrieve the trouble code, inspecting the wiring and connectors for damage, checking the transmission fluid level and condition, and testing the pressure control solenoid.

4. Can I continue driving my 2017 Chevrolet Silverado with OBDII code P2721?

It is not recommended to continue driving with this code as it can lead to further damage to the transmission. It is best to address the issue promptly.

5. How serious is OBDII code P2721 in a 2017 Chevrolet Silverado?

This code indicates a problem with the pressure control solenoid circuit, which can affect the transmission's performance. Ignoring this code can lead to transmission issues and potential drivability problems.

6. What are some repair tips for fixing the Pressure Control Solenoid 4 Control Circuit High Voltage code in a 2017 Chevrolet Silverado?

Repair tips include checking and repairing any damaged wiring or connectors, replacing the pressure control solenoid if faulty, ensuring proper transmission fluid level and quality, and resetting the trouble code after repairs are completed.

7. How much does it typically cost to repair OBDII code P2721 in a 2017 Chevrolet Silverado?

The cost of repair can vary depending on the exact cause of the issue. It may involve replacing the pressure control solenoid, repairing wiring, or addressing other related components. Costs can range from a few hundred to a thousand dollars.

8. Can a DIY enthusiast fix OBDII code P2721 in a 2017 Chevrolet Silverado?

While some DIY enthusiasts may be able to diagnose and repair this code, it is recommended to have a professional mechanic with experience in transmission systems address the issue to ensure proper diagnosis and repair.

9. Will resetting the Check Engine Light resolve OBDII code P2721 in a 2017 Chevrolet Silverado?

Simply resetting the Check Engine Light will not fix the underlying issue causing the code. It is important to diagnose the problem and address the root cause to prevent further transmission problems.

10. How can I prevent OBDII code P2721 from appearing in my 2017 Chevrolet Silverado in the future?

To prevent this code from reoccurring, make sure to perform regular transmission maintenance, check the transmission fluid level and quality, address any leaks promptly, and avoid harsh driving habits that can strain the transmission system.