AutoCodes – Pontiac – P0777 Pontiac

P0777 Pontiac Code - Clutch Pressure Control Solenoid 2 Stuck On

Quick Answer

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Clutch Pressure Control Solenoid 2. 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: P0777 Pontiac indicates Clutch Pressure Control Solenoid 2 Stuck On.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty Clutch Pressure Control Solenoid 2.
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 2,739

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 Jun 26, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0777 Pontiac Description

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to the 3-5-R clutch. The Transmission Control Module (TCM) calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

OBDII Code P0777 Pontiac - Clutch Pressure Control Solenoid 2 Stuck On - AutoCodes.com — P0777 Pontiac Code - Clutch Pressure Control Solenoid 2 Stuck On

What does this mean?

What are the Possible Causes of the DTC P0777 Pontiac?

Low transmission fluid level
Dirty transmission fluid
Faulty Clutch Pressure Control Solenoid 2
Clutch Pressure Control Solenoid 2 harness is open or shorted
Clutch Pressure Control Solenoid 2 circuit poor electrical connection

How to Fix the DTC P0777 Pontiac?

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 does this mean?

Code Tech Notes

When a transmission solenoid is malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body. If the transmission fluid is dirty, it's recommended to change the transmission fluid and if possible removing the transmission pan for further diagnosis. Excessive debris or metal particles on the transmission pan could be an indication that there is a mechanical transmission failure and that the transmission will need to be rebuilt or replaced.

There is a factory service bulletin for the following Pontiac Models:
2007-2009 Pontiac G6
2008-2009 Pontiac Torrent
Pontiac Factory Service Bulletin OBDII Code P0777

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0777 Pontiac 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 P0777 Pontiac Code

What does OBDII code P0777 mean for a Pontiac?

Code P0777 indicates the Clutch Pressure Control Solenoid 2 is stuck on, which can affect the transmission's ability to shift properly.

What are the common symptoms of P0777 in a Pontiac?

Symptoms include harsh or delayed shifting, transmission slipping, poor acceleration, and possibly the check engine light turning on.

What causes the P0777 code in a Pontiac?

Common causes include a faulty pressure control solenoid, transmission fluid issues (low or dirty), wiring problems, or internal transmission damage.

Can driving with the P0777 code damage my Pontiac?

Yes, driving with this code can lead to further transmission damage and unsafe driving conditions if the issue isn't addressed promptly.

How can I diagnose the P0777 code on a Pontiac?

Start by checking the transmission fluid level and condition, inspecting wiring and connectors for damage, and testing the pressure control solenoid for proper operation.

How do I fix the P0777 code on a Pontiac?

Repairs may involve replacing the pressure control solenoid, cleaning or flushing the transmission fluid, repairing damaged wiring, or addressing internal transmission issues.

What maintenance can prevent the P0777 code?

Regular transmission fluid changes and inspections of the transmission system can help prevent solenoid-related issues and extend the life of the transmission.

Can a faulty pressure control solenoid cause other codes besides P0777?

Yes, a faulty solenoid can trigger other transmission-related codes, such as P0776 or P0778, depending on the nature of the issue.

How much does it cost to fix the P0777 code on a Pontiac?

Repair costs can vary greatly, ranging from $150-$500 for solenoid replacement to over $1,000 for internal transmission repairs, depending on the severity of the issue.

Should I take my Pontiac to a mechanic for the P0777 code?

If the issue isn't resolved by simple maintenance like replacing the transmission fluid, itâ€™s best to consult a certified mechanic for further diagnosis and repair.