AutoCodes – Chevrolet – P2721 2016 Chevrolet Silverado

P2721 2016 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 2016 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 362

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 2016 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 2016 Chevrolet Silverado - Pressure Control Solenoid 4 Control Circuit High Voltage - AutoCodes.com — P2721 2016 Chevrolet Silverado Code - Pressure Control Solenoid 4 Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P2721 2016 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 2016 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 2016 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 2016 Chevrolet Silverado code?

Need more information on how to fix the P2721 2016 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 2016 Chevrolet Silverado Code

1. What does the OBDII code P2721 mean for a 2016 Chevrolet Silverado?

P2721 indicates a high voltage issue in the Pressure Control Solenoid 4 control circuit, which is part of the transmission system responsible for regulating hydraulic pressure.

2. What are common symptoms of the P2721 code in a 2016 Chevrolet Silverado?

Symptoms may include harsh or delayed shifting, transmission slipping, poor fuel economy, and the illumination of the check engine light.

3. What causes the P2721 code to appear on a 2016 Chevrolet Silverado?

Common causes include a faulty pressure control solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid, or a malfunctioning transmission control module (TCM).

4. Can I still drive my 2016 Chevrolet Silverado with the P2721 code?

Driving with this code is not recommended as it can lead to further transmission damage or unsafe driving conditions due to shifting issues.

5. How do I diagnose the P2721 code on my 2016 Chevrolet Silverado?

Diagnosis involves checking the transmission fluid level, inspecting the wiring and connectors for damage, testing the solenoid for proper function, and using a scan tool to monitor transmission control module signals.

6. How do I fix the P2721 code on a 2016 Chevrolet Silverado?

Repairs may include replacing the faulty pressure control solenoid, repairing or replacing damaged wiring or connectors, topping off or flushing transmission fluid, or reprogramming or replacing the TCM.

7. How much does it cost to fix the P2721 code on a 2016 Chevrolet Silverado?

Costs can vary but typically range from $200 to $500 for solenoid replacement or wiring repairs. TCM replacement or programming may increase costs significantly.

8. Will clearing the P2721 code with a scan tool fix the issue?

Clearing the code will turn off the check engine light temporarily, but the underlying issue must be addressed to prevent the code from returning.

9. Can low transmission fluid cause the P2721 code on a 2016 Chevrolet Silverado?

Yes, low or contaminated transmission fluid can cause pressure control solenoid issues, potentially triggering the P2721 code.

10. Do I need to replace the entire transmission to fix the P2721 code?

In most cases, replacing the entire transmission is unnecessary. The issue is commonly resolved by addressing the specific component, such as the solenoid or wiring.