AutoCodes – Nissan – P0797 2006 Nissan Altima Sedan

P0797 2006 Nissan Altima Sedan 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 2006 Nissan Altima Sedan 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 3,563

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
FAQs
Comments
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Code P0797 2006 Nissan Altima Sedan 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 2006 Nissan Altima Sedan - Pressure Control Solenoid 'C' Stuck On - AutoCodes.com — P0797 2006 Nissan Altima Sedan Code - Pressure Control Solenoid 'C' Stuck On

What does this mean?

What are the Possible Causes of the DTC P0797 2006 Nissan Altima Sedan?

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 2006 Nissan Altima Sedan?

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 2006 Nissan Altima Sedan 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 2006 Nissan Altima Sedan Code

1. What does the OBDII code P0797 mean on a 2006 Nissan Altima Sedan?

P0797 indicates that the transmission control module (TCM) has detected that the pressure control solenoid 'C' is stuck in the "on" position, causing improper transmission fluid pressure regulation.

2. What are the common symptoms of the P0797 code on a 2006 Nissan Altima?

Symptoms include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, and potentially the vehicle going into limp mode.

3. What causes the P0797 code to trigger in a 2006 Nissan Altima?

Common causes include a faulty pressure control solenoid, dirty or contaminated transmission fluid, a clogged transmission filter, wiring issues, or internal transmission damage.

4. Can driving with the P0797 code damage my 2006 Nissan Altima?

Yes, driving with this code can cause further transmission damage, as improper fluid pressure regulation may lead to overheating or excessive wear on internal components.

5. How do I diagnose the P0797 code on a 2006 Nissan Altima?

Diagnosis typically involves scanning for other codes, inspecting the transmission fluid for contamination, testing the pressure control solenoid, and checking wiring and connectors for damage or corrosion.

6. How can I fix the P0797 code on my 2006 Nissan Altima?

Repairs may include replacing the pressure control solenoid, flushing and replacing the transmission fluid, replacing the transmission filter, or repairing damaged wiring.

7. How much does it cost to fix the P0797 code on a 2006 Nissan Altima?

The cost can vary widely. A solenoid replacement may cost between $200 and $500, while more extensive repairs, like fixing internal transmission issues, may cost significantly more.

8. Can low transmission fluid cause the P0797 code on a 2006 Nissan Altima?

Yes, low or dirty transmission fluid can cause pressure control solenoids to malfunction, potentially triggering the P0797 code.

9. Is a transmission flush necessary to fix the P0797 code on a 2006 Nissan Altima?

A flush may be necessary if the transmission fluid is dirty or contaminated, as clean fluid is critical for solenoid operation and overall transmission performance.

10. Can I clear the P0797 code without fixing the problem on a 2006 Nissan Altima?

Clearing the code without addressing the underlying issue will not resolve the problem, and the code is likely to return when the fault is detected again.