AutoCodes – Chevrolet – P2721 Chevrolet

P2721 Chevrolet 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 Chevrolet 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 3,028

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

What does this mean?

What are the Possible Causes of the DTC P2721 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

Get the P2721 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Information for Specific Chevrolet Models

P2721 2014 Chevrolet Silverado — Pressure Control Solenoid 4 Control Circuit High Voltage
P2721 2015 Chevrolet Silverado — Pressure Control Solenoid 4 Control Circuit High Voltage
P2721 2016 Chevrolet Silverado — Pressure Control Solenoid 4 Control Circuit High Voltage
P2721 2017 Chevrolet Silverado — Pressure Control Solenoid 4 Control Circuit High Voltage
P2721 2018 Chevrolet Silverado — Pressure Control Solenoid 4 Control Circuit High Voltage

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 Chevrolet Code

1. What are the common symptoms of OBDII code P2721 in a Chevrolet related to the Pressure Control Solenoid 4 Control Circuit High Voltage?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code P2721 in a Chevrolet?

- The code P2721 can be triggered by issues such as a faulty pressure control solenoid, damaged wiring or connectors, low transmission fluid levels, or internal transmission problems.

3. How can I diagnose the cause of OBDII code P2721 in my Chevrolet?

- To diagnose the issue, you may need to perform a thorough inspection of the transmission system, check the wiring and connectors for any damage, and use a scan tool to monitor the pressure control solenoid's operation.

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

- It's not recommended to continue driving your vehicle with code P2721 present, as it can lead to further damage to the transmission system and potentially result in costly repairs.

5. How can I repair OBDII code P2721 in my Chevrolet related to the Pressure Control Solenoid 4 Control Circuit High Voltage?

- Repairing the issue may involve replacing the pressure control solenoid, repairing or replacing damaged wiring or connectors, ensuring proper transmission fluid levels, and clearing the trouble codes with a scan tool.

6. Are there any preventive maintenance tips to avoid OBDII code P2721 in a Chevrolet?

- Regular transmission fluid checks and changes, prompt repairs of any transmission-related issues, and proper vehicle maintenance can help prevent the occurrence of code P2721.

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

- The cost of repairs for code P2721 can vary depending on the root cause of the issue, but it may range from $200 to $800, including parts and labor.

8. Can a DIY enthusiast fix OBDII code P2721 in a Chevrolet at home?

- If you have experience working on automotive systems and access to the necessary tools, you may be able to diagnose and repair code P2721 at home. However, complex transmission repairs may require professional assistance.

9. Will resetting the Check Engine Light clear OBDII code P2721 in a Chevrolet?

- Resetting the Check Engine Light may temporarily clear the code, but if the underlying issue causing code P2721 is not addressed, the code is likely to reappear after driving the vehicle.

10. How long does it take to repair OBDII code P2721 in a Chevrolet?

- The repair time for code P2721 can vary depending on the specific cause of the issue, but it typically takes a few hours to a full day for a professional technician to diagnose and fix the problem.