P2739 2017 GMC Sierra Code - Transmission Control Solenoid Valve 6 Control Circuit High Voltage
Quick Answer
The P2739 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Transmission Control Solenoid Valve 6 Control Circuit High Voltage. Common causes include Faulty transmission control solenoid valve 6, Short circuit in the control circuit, Damaged wiring or connectors. 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
- P2739 2017 GMC Sierra indicates Transmission Control Solenoid Valve 6 Control Circuit High Voltage.
- Common causes
- Common causes include Faulty transmission control solenoid valve 6, Short circuit in the control circuit, Damaged wiring or connectors.
- 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 P2739 2017 GMC Sierra Description
The P2739 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Transmission Control Solenoid Valve 6 Control Circuit High Voltage. This code indicates that the powertrain control module (PCM) has detected a higher than normal voltage in the control circuit for the transmission control solenoid valve 6. This solenoid is responsible for controlling the flow of transmission fluid in order to regulate the operation of the transmission.
Common Causes of P2739 2017 GMC Sierra
- Faulty transmission control solenoid valve 6
- Short circuit in the control circuit
- Damaged wiring or connectors
- Issues with the PCM
- Transmission fluid contamination or low fluid levels
Symptoms of P2739 2017 GMC Sierra
- Erratic shifting of gears
- Delayed or harsh shifting
- Transmission slipping
- Transmission overheating
- Illumination of the Check Engine Light
How to Fix P2739 2017 GMC Sierra
- Diagnose the issue by using a scan tool to retrieve the DTC and inspect the transmission control solenoid valve 6 and its wiring.
- Replace the faulty transmission control solenoid valve 6 if it is determined to be the cause of the high voltage.
- Inspect and repair any damaged wiring or connectors in the control circuit.
- Clear the DTC from the PCM memory and test drive the vehicle to ensure proper operation.
- Perform a transmission fluid flush and refill if necessary to prevent any further damage to the transmission system.
Cost to Fix P2739 2017 GMC Sierra
The typical repair costs for addressing the P2739 code on a 2017 GMC Sierra can range from $200 to $600, including parts and labor. However, it is important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates may be higher at dealerships or in metropolitan areas, while independent shops may offer lower rates. It is recommended to obtain quotes from local auto repair shops for a more accurate estimate.
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Frequently Asked Questions about P2739 2017 GMC Sierra Code
1. What does the OBDII code P2739 mean on a 2017 GMC Sierra?
P2739 indicates a "Transmission Control Solenoid Valve 6 Control Circuit High Voltage," meaning the ECU has detected an abnormally high voltage in the circuit controlling solenoid valve 6 in the transmission.
2. What are the common symptoms of code P2739 on a 2017 GMC Sierra?
Symptoms include harsh or delayed shifting, failure to shift gears, transmission slipping, reduced fuel efficiency, and the Check Engine Light illuminating.
3. What causes the P2739 code to appear on a 2017 GMC Sierra?
Common causes include a faulty solenoid valve, damaged wiring or connectors in the solenoid circuit, a malfunctioning transmission control module (TCM), or electrical issues such as shorted or corroded connections.
4. Can I drive my 2017 GMC Sierra with a P2739 code?
While the truck may still be drivable, it’s not recommended as it can worsen transmission performance, lead to further damage, or leave you stranded if the issue escalates.
5. How do you diagnose the P2739 code on a 2017 GMC Sierra?
Diagnosis involves checking the wiring and connectors for damage or corrosion, testing the solenoid for proper operation, and using a multimeter to measure circuit voltage and resistance.
6. How do you fix the P2739 code on a 2017 GMC Sierra?
Repairs may include replacing the faulty solenoid, repairing or replacing damaged wiring or connectors, cleaning corroded connections, or reprogramming or replacing the TCM if necessary.
7. How much does it cost to fix the P2739 code on a 2017 GMC Sierra?
Repair costs vary but typically range from $150 to $450, depending on whether you need to replace a solenoid, repair wiring, or address TCM issues.
8. Can a low transmission fluid level cause the P2739 code?
While low fluid levels don’t directly cause this code, they can lead to poor transmission performance, which might indirectly contribute to solenoid issues.
9. Does clearing the P2739 code fix the problem?
Clearing the code may turn off the Check Engine Light temporarily, but it won’t fix the underlying issue. Proper diagnosis and repair are needed to prevent the code from returning.
10. Can a bad battery cause the P2739 code on a 2017 GMC Sierra?
A weak or failing battery can cause electrical issues that may affect the transmission control system, but this is less common. It’s worth checking the battery and charging system during diagnosis.
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