P0966 2017 GMC Sierra Code - Pressure Control Solenoid Valve 2 Control Circuit Low Voltage
Quick Answer
The pressure control solenoid 2 is part of the control solenoid valve assembly which has no serviceable parts. Common causes include Low transmission fluid, Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted. 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
- P0966 2017 GMC Sierra indicates Pressure Control Solenoid Valve 2 Control Circuit Low Voltage.
- Common causes
- Common causes include Low transmission fluid, Faulty Control Solenoid Valve Assembly, Control Solenoid Valve Assembly harness is open or shorted.
- 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 P0966 2017 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module detects a short to ground on the clutch pressure control solenoid 2 control circuit for 1 s.
What are the Possible Causes of the DTC P0966 2017 GMC Sierra?
- Low transmission fluid
- Faulty Control Solenoid Valve Assembly
- Control Solenoid Valve Assembly harness is open or shorted
- Control Solenoid Valve Assembly circuit poor electrical connection
How to Fix the DTC P0966 2017 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 P0966 2017 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 P0966 2017 GMC Sierra code?
Need more information on how to fix the P0966 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0966 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0966 2017 GMC Sierra Code
1. What does the OBDII code P0966 mean on a 2017 GMC Sierra?
P0966 indicates a low voltage issue in the control circuit of Pressure Control Solenoid Valve 2, which is part of the transmission system responsible for regulating hydraulic pressure.
2. What are the common symptoms of code P0966 in a 2017 GMC Sierra?
Symptoms may include harsh or erratic shifting, transmission slipping, delayed engagement, decreased fuel efficiency, or the transmission going into limp mode.
3. What causes the P0966 code to appear on a GMC Sierra?
Common causes include a faulty pressure control solenoid, damaged wiring or connectors in the solenoid circuit, low transmission fluid levels, or a malfunctioning transmission control module (TCM).
4. Can driving with a P0966 code damage my 2017 GMC Sierra?
Yes, prolonged driving with this code could lead to further transmission damage and more costly repairs. It’s best to address the issue as soon as possible.
5. How can I diagnose a P0966 code on my GMC Sierra?
Start by checking the transmission fluid level and condition. Inspect the wiring and connectors for damage or corrosion. Use a multimeter to test the solenoid circuit for proper voltage and continuity.
6. How do I fix the P0966 code on my 2017 GMC Sierra?
Repairs may include replacing the pressure control solenoid, repairing or replacing damaged wiring/connectors, topping off or replacing the transmission fluid, or reprogramming the TCM if necessary.
7. How much does it cost to fix a P0966 code?
The cost can vary widely. Replacing a pressure control solenoid typically costs between $200 and $500, while more extensive repairs like wiring replacement or TCM reprogramming may raise the cost.
8. Can low transmission fluid cause a P0966 code?
Yes, low or contaminated transmission fluid can cause improper pressure regulation, triggering the P0966 code.
9. Do I need to replace the transmission if I get a P0966 code?
Not necessarily. This code is often related to a specific solenoid or circuit issue, which may not require a full transmission replacement.
10. Can a failing TCM cause the P0966 code on a GMC Sierra?
Yes, a malfunctioning transmission control module can fail to provide proper voltage to the solenoid and trigger the P0966 code.
Discuss the causes and fixes for P0966 2017 GMC Sierra OBDII Code
Code P0966 2017 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.
