AutoCodes – Cadillac – P2728 Cadillac

P2728 Cadillac Code - Pressure Control Solenoid Valve Performance

Quick Answer

The pressure control solenoid 5 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: P2728 Cadillac indicates Pressure Control Solenoid Valve Performance.
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 285

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 P2728 Cadillac Description

The pressure control solenoid 5 is part of the control solenoid valve assembly which has no serviceable parts. The normally low-pressure control solenoid 5 regulates and directs oil pressure to the 1-2-3-4 clutch regulator valve and 1-2-3-4 clutch boost valve. Increasing pressure control solenoid 5 pressure increases pressure to the 1-2-3-4 clutch. The Transmission Control Module varies the current to the pressure control solenoid 5 through a low-side driver. Increasing the current to pressure control solenoid 5 increases oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to pressure control solenoid 5 decreases oil pressure by opening the exhaust port. Pressure control solenoid 5 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 internal electrical performance malfunction of the clutch pressure control solenoid valve 5 control circuit where the measured clutch pressure control solenoid valve 5 current does not equal the commanded clutch pressure control solenoid valve 5 current for 5 s.

OBDII Code P2728 Cadillac - Pressure Control Solenoid Valve Performance - AutoCodes.com — P2728 Cadillac Code - Pressure Control Solenoid Valve Performance

What does this mean?

What are the Possible Causes of the DTC P2728 Cadillac?

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 P2728 Cadillac?

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 P2728 Cadillac 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.

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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 P2728 Cadillac Code

1. What are common symptoms of OBDII code P2728 in a Cadillac?

- Common symptoms include harsh shifting, delayed gear engagement, transmission slipping, and decreased fuel efficiency.

2. What can cause the OBDII code P2728 in a Cadillac?

- The code P2728 is typically triggered by a malfunctioning pressure control solenoid valve, low transmission fluid levels, a faulty transmission control module, or internal transmission issues.

3. How serious is the P2728 code in a Cadillac?

- The P2728 code should be addressed promptly, as it can lead to further transmission damage if left unattended. It is advisable to have the vehicle inspected by a professional as soon as possible.

4. How can I diagnose the cause of the P2728 code in my Cadillac?

- Diagnosing the P2728 code usually involves checking the transmission fluid level and condition, inspecting the pressure control solenoid valve, and performing a comprehensive transmission system scan with a diagnostic tool.

5. Can I drive my Cadillac with the P2728 code present?

- It is not recommended to continue driving your Cadillac with the P2728 code present, as it can lead to potential transmission failure or further damage. It is best to have the issue resolved before driving the vehicle again.

6. How much does it cost to repair the P2728 code in a Cadillac?

- The cost of repairing the P2728 code can vary depending on the exact cause of the issue. Repairs may range from replacing the pressure control solenoid valve to addressing more complex transmission problems, so it's best to get a professional assessment for an accurate estimate.

7. Can I reset the P2728 code in my Cadillac myself?

- While you can clear the code using an OBDII scanner, it is important to address the underlying issue causing the P2728 code before resetting it. Simply clearing the code without fixing the problem may lead to recurring issues.

8. Are there any DIY tips for fixing the P2728 code in a Cadillac?

- DIY tips for addressing the P2728 code include checking for any visible transmission leaks, ensuring the transmission fluid is at the correct level and in good condition, and inspecting the electrical connections to the pressure control solenoid valve.

9. How long does it take to repair the P2728 code in a Cadillac?

- The time required to repair the P2728 code can vary based on the specific cause of the issue and the extent of the repairs needed. Simple fixes like replacing the pressure control solenoid valve may take a few hours, while more complex transmission repairs could take longer.

10. Can the P2728 code in a Cadillac come back after being repaired?

- If the underlying cause of the P2728 code is not fully addressed during the repair, there is a possibility that the code may reappear. It is essential to ensure that all related issues are properly resolved to prevent the code from returning.