P2721 2015 GMC Sierra 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 GMC Sierra 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.
Code P2721 2015 GMC Sierra Description
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.
What are the Possible Causes of the DTC P2721 2015 GMC Sierra?
- 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 GMC Sierra?
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 GMC Sierra 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 GMC Sierra code?
Need more information on how to fix the P2721 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P2721 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P2721 2015 GMC Sierra Code
1. What does the OBDII code P2721 mean on a 2015 GMC Sierra?
P2721 indicates a problem in the transmission pressure control solenoid 4 circuit, specifically a high voltage condition.
2. What are the common symptoms of code P2721 in a 2015 GMC Sierra?
Symptoms may include harsh or delayed shifting, transmission slipping, decreased fuel efficiency, or the vehicle going into limp mode.
3. What causes the P2721 code to appear in a 2015 GMC Sierra?
Common causes include a faulty pressure control solenoid, damaged wiring or connectors in the transmission circuit, or issues with the transmission control module (TCM).
4. Can I still drive my 2015 GMC Sierra with the P2721 code?
While the vehicle may still be drivable, continuing to drive with this code can cause further transmission damage. It’s best to address the issue promptly.
5. How do I diagnose the P2721 code on a 2015 GMC Sierra?
Diagnosis typically involves scanning for codes, inspecting the wiring and connectors for damage, testing the solenoid, and checking the transmission fluid level and condition.
6. What repair options are available for fixing the P2721 code?
Repairs may include replacing the faulty pressure control solenoid, repairing damaged wiring, cleaning or replacing connectors, or reprogramming/updating the TCM.
7. How much does it cost to fix the P2721 code on a 2015 GMC Sierra?
Repair costs can range from $200 to $500 depending on whether the solenoid, wiring, or TCM needs to be replaced or repaired.
8. Can low transmission fluid cause the P2721 code in a GMC Sierra?
Yes, low or contaminated transmission fluid can cause issues with pressure control solenoids and trigger the P2721 code.
9. Is the P2721 code a common issue for the 2015 GMC Sierra?
It’s not extremely common but can occur, especially in vehicles with high mileage or poor transmission maintenance.
10. Will clearing the P2721 code fix the problem in a 2015 GMC Sierra?
Clearing the code may temporarily remove the check engine light, but the underlying issue must be resolved to prevent the code from returning.
Discuss the causes and fixes for P2721 2015 GMC Sierra OBDII Code
Code P2721 2015 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
