P2738 2015 GMC Sierra Code - Transmission Control Solenoid Valve 6 Control Circuit Low Voltage
Quick Answer
The Transmission Control Solenoid Valve Solenoid Valve is an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve. 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
- P2738 2015 GMC Sierra indicates Transmission Control Solenoid Valve 6 Control Circuit Low Voltage.
- Common causes
- Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Transmission Control Solenoid Valve.
- 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 P2738 2015 GMC Sierra Description
What are the Possible Causes of the DTC P2738 2015 GMC Sierra?
- Low transmission fluid level
- Dirty transmission fluid
- Faulty Transmission Control Solenoid Valve
- Transmission Control Solenoid Valve harness is open or shorted
- Transmission Control Solenoid Valve circuit poor electrical connection
- Faulty Transmission Control Module (TCM)
How to Fix the DTC P2738 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 P2738 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.
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Frequently Asked Questions about P2738 2015 GMC Sierra Code
1. What does the OBDII code P2738 mean on a 2015 GMC Sierra?
P2738 indicates a low voltage issue in the control circuit for Transmission Control Solenoid Valve 6, which may affect the transmission's ability to shift properly.
2. What are the common symptoms of code P2738 in a 2015 GMC Sierra?
Symptoms include harsh or delayed shifting, slipping gears, reduced fuel efficiency, transmission overheating, or the vehicle entering limp mode.
3. What causes the P2738 code to appear in a GMC Sierra?
Common causes include a faulty transmission control solenoid, damaged wiring or connectors in the solenoid circuit, a malfunctioning transmission control module (TCM), or low transmission fluid.
4. Can driving with code P2738 damage the transmission?
Yes, continuing to drive with this code can lead to further damage to the transmission if the issue is not addressed promptly.
5. How can I diagnose the P2738 code in my 2015 GMC Sierra?
Start by checking the transmission fluid level and condition, inspecting the wiring and connectors for damage, and testing the solenoid itself for proper function and electrical resistance.
6. What tools are needed to troubleshoot the P2738 code?
You’ll need an OBDII scanner, a multimeter for checking voltage and resistance, and possibly a transmission pressure gauge to confirm proper operation.
7. How is the P2738 code fixed on a 2015 GMC Sierra?
Repairs may involve replacing the faulty solenoid, repairing or replacing damaged wiring, cleaning connectors, or reprogramming or replacing the transmission control module.
8. Can low transmission fluid cause the P2738 code?
Yes, low or contaminated transmission fluid can cause improper solenoid operation, leading to the P2738 code.
9. How much does it typically cost to fix the P2738 code on a GMC Sierra?
Repair costs can range from $150 to $400 for solenoid replacement, but it may be higher if the TCM or wiring needs significant work.
10. Is it safe to clear the P2738 code without making repairs?
Clearing the code without addressing the root cause is not recommended, as the problem will likely recur and may lead to further transmission damage.
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