AutoCodes – Nissan – P0797 Nissan

P0797 Nissan Code - Pressure Control Solenoid 'C' Stuck On

Quick Answer

The Pressure Control (PC) Solenoid Valve 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 pressure control solenoid valve 'C'. 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 Nissan indicates Pressure Control Solenoid 'C' Stuck On.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty pressure control solenoid valve 'C'.
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 37,104

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 Jan 30, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P0797 Nissan Description

The Pressure Control (PC) Solenoid Valve an electronic pressure regulator that controls transmission line pressure based on current flow through its coil windings. As current flow is increased, the magnetic field produced by the coil moves the solenoid’s plunger further away from the exhaust port. Opening the exhaust port decreases the output fluid pressure regulated by the PC solenoid valve, which ultimately decreases line pressure. The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM).

OBDII Code P0797 Nissan - Pressure Control Solenoid 'C' Stuck On - AutoCodes.com — P0797 Nissan Code - Pressure Control Solenoid 'C' Stuck On

What does this mean?

What are the Possible Causes of the DTC P0797 Nissan?

Low transmission fluid level
Dirty transmission fluid
Faulty pressure control solenoid valve 'C'
Pressure control solenoid valve 'C' harness is open or shorted
Pressure control solenoid valve 'C' circuit poor electrical connection

How to Fix the DTC P0797 Nissan?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0797 Nissan 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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Information for Specific Nissan Models

P0797 2005 Nissan Altima Sedan — Pressure Control Solenoid 'C' Stuck On
P0797 2006 Nissan Altima Sedan — Pressure Control Solenoid 'C' Stuck On

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 Nissan Code

No Frequently Asked Questions about P0797 Nissan Code found.

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69javelin Jm
Date: November 26, 2011 at 1:58 pm

I agree. In the case of my friends 05 Maxima it was low on fluid and filthy. It only threw the code once. I cleared the code and it didn't come back. He's getting the fluid changed this week.

Reply to Comment
Beejay
Date: June 9, 2016 at 6:48 pm

Where is solenoid c located in Nissan maxima 2005
.

Reply to Comment
OBDIITech
Date: June 12, 2016 at 4:55 pm

The solenoid is attched to the transmission valve body and the valve body is inside the transmission.
Here is a good tutorial on how to replace the valve body: http://my6thgen.org/f107/20...

Reply to Comment
Alvin Long
Date: February 12, 2017 at 7:43 pm

where is solenoid C

Reply to Comment
OBDIITech
Date: February 12, 2017 at 7:54 pm

What model and year is your Nissan? On most Nissan vehicles, the transmission solenoids are inside the transmission.

Reply to Comment
Melissa
Date: March 21, 2017 at 7:39 pm

just had another transmission put in its worth now them before now this code is coming up

Reply to Comment
OBDIITech
Date: April 4, 2017 at 10:42 pm

Did you use a used or rebuilt transmission?

Reply to Comment
Mike
Date: November 28, 2018 at 12:19 pm

Can a stuck open valve C cause the vehicle not to move?

Reply to Comment
OBDIITech
Date: November 28, 2018 at 4:39 pm

Yes. There are many reasons why the valve can get stuck. If the problem is mechanical or low fluid, then along with the stuck valve, there may be other failing components, even though the scanner only shows the P0797 code.

Reply to Comment
Mike
Date: November 29, 2018 at 11:33 am

I was going down the road and it seems like it went in neutral.Check engine light came on and this was the code. No forward or reverse. Would replacing this solenoid possibly get it going? 2005 Nissan Maxima

Reply to Comment
OBDIITech
Date: November 30, 2018 at 12:39 am

Start by checking the transmission fluid level and condition. If the fluid is low and dirty, then you could try changing the fluid (no transmission flush). If the problem persist, then I recommend having a transmission shop inspect the transmission.

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