AutoCodes – Chevrolet – P2721 2015 Chevrolet Silverado

P2721 2015 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 2015 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 347

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 2015 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 2015 Chevrolet Silverado - Pressure Control Solenoid 4 Control Circuit High Voltage - AutoCodes.com — P2721 2015 Chevrolet Silverado Code - Pressure Control Solenoid 4 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2721 2015 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 2015 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 2015 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 2015 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 2015 Chevrolet Silverado Code

1. What are common symptoms of OBDII code P2721 in a 2015 Chevrolet Silverado?

- Common symptoms include rough shifting, hesitation during acceleration, illuminated Check Engine light, and decreased fuel efficiency.

2. What does the OBDII code P2721 for a Pressure Control Solenoid 4 Control Circuit High Voltage indicate in a 2015 Chevrolet Silverado?

- This code indicates that the powertrain control module (PCM) has detected a high voltage condition in the control circuit of Pressure Control Solenoid 4.

3. What are possible causes of OBDII code P2721 in a 2015 Chevrolet Silverado?

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

4. How can I diagnose the OBDII code P2721 in my 2015 Chevrolet Silverado?

- Diagnosing this code typically involves checking the transmission fluid level, inspecting the wiring and connectors related to Pressure Control Solenoid 4, and performing a thorough scan with a diagnostic tool to pinpoint the issue.

5. Can I continue driving my 2015 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 advisable to have the issue diagnosed and repaired promptly.

6. How can I repair OBDII code P2721 in my 2015 Chevrolet Silverado?

- Repair options may include replacing the Pressure Control Solenoid 4, repairing or replacing damaged wiring/connectors, ensuring proper transmission fluid levels, and resetting the PCM after the repair.

7. Is it necessary to reset the PCM after repairing OBDII code P2721 in a 2015 Chevrolet Silverado?

- Yes, resetting the PCM is important to clear the error code and allow the vehicle to relearn the correct parameters after the repair is completed.

8. Are there any preventive maintenance steps to avoid OBDII code P2721 in a 2015 Chevrolet Silverado?

- Regularly checking and maintaining proper transmission fluid levels, addressing any transmission issues promptly, and ensuring all electrical connections are secure can help prevent this code from occurring.

9. Can a DIY enthusiast fix OBDII code P2721 in a 2015 Chevrolet Silverado?

- While some may attempt DIY repairs for this code, it is recommended to have a professional mechanic diagnose and repair the issue due to the complexity of transmission systems.

10. How much can I expect to pay for repairing OBDII code P2721 in my 2015 Chevrolet Silverado?

- Repair costs for this code can vary depending on the exact cause of the issue, but it is advisable to budget for a few hundred dollars for parts and labor.