AutoCodes – Cadillac – P0797 Cadillac

P0797 Cadillac 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 Cadillac 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.

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Code Popularity 3,146

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0797 Cadillac Description

The clutch pressure control solenoid 3 is part of the control solenoid valve assembly, which has no serviceable parts. The Clutch Pressure Control Solenoid 3 regulates transmission fluid pressure to the CBR1/C 4-5-6 clutch regulator valve which controls pressure to the low/reverse clutch and the 4-5-6 clutch. The Transmission Control Module calculates gear ratio based on the RPM signals from the input speed sensor (ISS) and the output speed sensor (OSS). The Transmission Control Module compares the expected transmission gear ratio to the calculated gear ratio for each commanded gear. The Diagnostic Trouble Code (DTC) will be set when the Transmission Control Module has detected an incorrect gear ratio change when the low and reverse clutch and the 4-5-6 clutch is commanded OFF during a shift or when 4th gear ratio is detected in 1st gear. This condition must occur 3 times.

OBDII Code P0797 Cadillac - Pressure Control Solenoid Valve 3 Stuck On - AutoCodes.com — P0797 Cadillac Code - Pressure Control Solenoid Valve 3 Stuck On

What does this mean?

What are the Possible Causes of the DTC P0797 Cadillac?

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 Cadillac?

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 Cadillac 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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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0797 Cadillac Code

1. What are the common symptoms of OBDII code P0797 in a Cadillac related to the Pressure Control Solenoid Valve 3 being stuck on?

- Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and the transmission staying in one gear.

2. What are the possible causes of the Pressure Control Solenoid Valve 3 getting stuck on in a Cadillac triggering the P0797 code?

- Possible causes include a faulty solenoid valve, low transmission fluid level, dirty or contaminated transmission fluid, or electrical issues.

3. How serious is the P0797 OBDII code related to the Pressure Control Solenoid Valve 3 being stuck on in a Cadillac?

- This code can lead to further transmission damage if not addressed promptly. It is recommended to address the issue as soon as possible to prevent costly repairs.

4. Can I continue driving my Cadillac with the P0797 code indicating a stuck Pressure Control Solenoid Valve 3?

- It is not advisable to continue driving the vehicle with this code as it can cause further damage to the transmission. It is recommended to have the issue diagnosed and repaired by a professional.

5. How can I diagnose the issue causing the P0797 code in my Cadillac related to the Pressure Control Solenoid Valve 3 being stuck on?

- Diagnosis typically involves a scan tool to read the OBDII code, checking the transmission fluid level and condition, inspecting the solenoid valve and its connections, and conducting a thorough transmission system check.

6. What are some repair options for fixing the P0797 code in a Cadillac due to the Pressure Control Solenoid Valve 3 being stuck on?

- Repair options may include replacing the faulty solenoid valve, performing a transmission fluid flush and filter replacement, checking and repairing any electrical connections, or seeking professional assistance for a comprehensive transmission system inspection.

7. Can a DIY enthusiast fix the P0797 code related to the Pressure Control Solenoid Valve 3 being stuck on in a Cadillac?

- While some simple checks like inspecting fluid levels can be done by the DIY enthusiast, addressing the root cause of the issue and performing repairs related to the transmission system may require professional expertise to ensure proper diagnosis and repair.

8. How much does it typically cost to repair the P0797 code in a Cadillac caused by the Pressure Control Solenoid Valve 3 being stuck on?

- The cost of repairs can vary depending on the exact cause of the issue and the extent of the damage. It is recommended to consult a professional mechanic for an accurate diagnosis and cost estimate.

9. Are there any preventive maintenance tips to avoid encountering the P0797 code in a Cadillac due to the Pressure Control Solenoid Valve 3 getting stuck on?

- Regularly checking and maintaining proper transmission fluid levels, performing scheduled transmission fluid changes, and addressing any transmission issues promptly can help prevent the occurrence of this code.