P0797 2018 GMC Sierra Code - Pressure Control Solenoid Valve 3 Stuck On
Quick Answer
The clutch pressure control solenoid 3 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
- P0797 2018 GMC Sierra indicates Pressure Control Solenoid Valve 3 Stuck On.
- 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 P0797 2018 GMC Sierra Description
What are the Possible Causes of the DTC P0797 2018 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 P0797 2018 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 P0797 2018 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 P0797 2018 GMC Sierra code?
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Frequently Asked Questions about P0797 2018 GMC Sierra Code
1. What does the OBDII code P0797 mean on a 2018 GMC Sierra?
P0797 indicates that the Powertrain Control Module (PCM) has detected that Pressure Control Solenoid Valve 3 is stuck in the "on" or closed position, disrupting proper transmission operation.
2. What are the common symptoms of code P0797 in a 2018 GMC Sierra?
Symptoms may include harsh or delayed shifting, transmission slipping, poor fuel efficiency, a check engine light, or the vehicle going into limp mode.
3. What causes the P0797 code to trigger in a 2018 GMC Sierra?
Common causes include a faulty pressure control solenoid, dirty or low transmission fluid, clogged transmission passages, wiring issues, or a malfunctioning PCM.
4. Can driving with code P0797 damage my 2018 GMC Sierra?
Yes, continuing to drive with this code can lead to further transmission damage, reduced performance, and higher repair costs.
5. How do I diagnose the P0797 code on a 2018 GMC Sierra?
Start by checking the transmission fluid level and condition, then inspect the wiring and connectors to the solenoid. Use a scan tool to monitor transmission pressure and solenoid operation.
6. How can I fix code P0797 in my 2018 GMC Sierra?
Repairs may involve replacing the faulty solenoid, flushing and refilling the transmission fluid, cleaning clogged passages, or repairing damaged wiring.
7. How much does it cost to repair the P0797 code on a 2018 GMC Sierra?
Repair costs can vary, but replacing a pressure control solenoid can range from $200 to $500, depending on labor and parts.
8. Can low transmission fluid cause the P0797 code?
Yes, low or dirty transmission fluid can prevent the solenoid from functioning properly and may trigger this code.
9. Do I need to replace the entire transmission if I get the P0797 code?
Not necessarily. In most cases, the issue can be resolved by repairing or replacing the affected solenoid or addressing fluid and wiring issues.
10. How can I prevent the P0797 code in my 2018 GMC Sierra?
Regular maintenance, including timely transmission fluid changes and inspections of wiring and connectors, can help prevent this issue.
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