AutoCodes – GMC – P2729 GMC

P2729 GMC Code - Pressure Control Solenoid Valve 5 Control Circuit Low Voltage

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: P2729 GMC indicates Pressure Control Solenoid Valve 5 Control Circuit Low 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 686

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 P2729 GMC 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 a short to ground on the clutch pressure control solenoid valve 5 control circuit for 1 s.

OBDII Code P2729 GMC - Pressure Control Solenoid Valve 5 Control Circuit Low Voltage - AutoCodes.com — P2729 GMC Code - Pressure Control Solenoid Valve 5 Control Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P2729 GMC?

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 P2729 GMC?

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 P2729 GMC 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 P2729 GMC code?

Need more information on how to fix the P2729 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

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Information for Specific GMC Models

P2729 2014 GMC Sierra — Pressure Control Solenoid Valve 5 Control Circuit Low Voltage
P2729 2015 GMC Sierra — Pressure Control Solenoid Valve 5 Control Circuit Low Voltage
P2729 2016 GMC Sierra — Pressure Control Solenoid Valve 5 Control Circuit Low Voltage
P2729 2017 GMC Sierra — Pressure Control Solenoid Valve 5 Control Circuit Low Voltage
P2729 2018 GMC Sierra — Pressure Control Solenoid Valve 5 Control Circuit Low 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 P2729 GMC Code

1. What are the common symptoms of OBDII code P2729 in a GMC vehicle?

- Common symptoms include harsh shifting, transmission slipping, decreased fuel efficiency, and the Check Engine light illuminating.

2. What can cause the Pressure Control Solenoid Valve 5 Control Circuit Low Voltage code P2729 in a GMC?

- Potential causes include a faulty pressure control solenoid valve, damaged wiring or connectors, low transmission fluid levels, or issues with the transmission control module.

3. How serious is the P2729 OBDII code in a GMC vehicle?

- Ignoring this code can lead to further damage to the transmission system and potentially result in more expensive repairs down the line. It is recommended to address this issue promptly.

4. What steps can I take to diagnose and repair OBDII code P2729 in my GMC?

- Diagnostic steps may include checking the transmission fluid level, inspecting the wiring and connectors, testing the pressure control solenoid valve, and scanning for any other related trouble codes.

5. Can I continue driving my GMC with the P2729 code present?

- It is not advisable to continue driving the vehicle with this code active, as it can lead to transmission issues and potential safety hazards. It is best to address the problem as soon as possible.

6. Are there any DIY repair tips for fixing the Pressure Control Solenoid Valve 5 Control Circuit Low Voltage code in a GMC?

- DIY repair tips may include checking and cleaning the connectors, ensuring proper transmission fluid levels, and consulting the vehicle's service manual for specific troubleshooting steps.

7. How much does it typically cost to fix OBDII code P2729 in a GMC at a repair shop?

- The cost of repairing this code can vary depending on the underlying issue and the labor rates of the repair shop. It is recommended to obtain quotes from different shops for an accurate estimate.

8. Can resetting the Check Engine light resolve the P2729 code in a GMC?

- Resetting the Check Engine light may temporarily clear the code, but it will not fix the underlying issue causing the code to appear. It is essential to diagnose and address the root cause of the problem.

9. Is it safe to clear the P2729 code using an OBDII scanner without fixing the issue?

- Clearing the code without fixing the problem can lead to ongoing transmission issues and potential damage. It is crucial to address the underlying cause of the code for safe and reliable vehicle operation.

10. How long does it typically take to repair OBDII code P2729 in a GMC?

- The repair time can vary depending on the exact cause of the code and the complexity of the repair. It is best to consult with a professional mechanic for an estimated repair timeline.