AutoCodes – Nissan – P0745 2004 Nissan Altima Sedan

P0745 2004 Nissan Altima Sedan Code - Line Pressure Solenoid Valve Fault

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 line pressure solenoid valve. 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: P0745 2004 Nissan Altima Sedan indicates Line Pressure Solenoid Valve Fault.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty line pressure solenoid valve.
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 8,120

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 28, 2020

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0745 2004 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 P0745 2004 Nissan Altima Sedan - Line Pressure Solenoid Valve Fault - AutoCodes.com — P0745 2004 Nissan Altima Sedan Code - Line Pressure Solenoid Valve Fault

What does this mean?

What are the Possible Causes of the DTC P0745 2004 Nissan Altima Sedan?

Low transmission fluid level
Dirty transmission fluid
Faulty line pressure solenoid valve
Line pressure solenoid valve harness is open or shorted
Line pressure solenoid valve circuit poor electrical connection

How to Fix the DTC P0745 2004 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.

There is a factory service bulletin for the 2004 Nissan Altima:
2004 Nissan Altima Factory Service Bulletin OBDII Code P0745

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0745 2004 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 P0745 2004 Nissan Altima Sedan Code

1. What are the common symptoms of OBDII code P0745 in a 2004 Nissan Altima Sedan?

The common symptoms include harsh shifting, transmission slipping, and decrease in fuel efficiency.

2. What does the OBDII code P0745 indicate in a 2004 Nissan Altima Sedan?

The code P0745 indicates a fault with the line pressure solenoid valve in the transmission.

3. What are the possible causes of the line pressure solenoid valve fault (P0745) in a 2004 Nissan Altima Sedan?

Possible causes include a faulty line pressure solenoid valve, low transmission fluid level, dirty transmission fluid, or wiring issues.

4. How can I diagnose the line pressure solenoid valve fault (P0745) in my 2004 Nissan Altima Sedan?

Diagnosis involves using an OBDII scanner to retrieve the trouble code, checking the transmission fluid level and condition, and inspecting the wiring to the solenoid valve.

5. Is it safe to continue driving my 2004 Nissan Altima Sedan with OBDII code P0745 (line pressure solenoid valve fault)?

It is not recommended to continue driving with this fault as it can lead to further damage to the transmission if left unresolved.

6. Can I repair the line pressure solenoid valve fault (P0745) in my 2004 Nissan Altima Sedan myself?

While some DIY enthusiasts may attempt the repair, it is recommended to consult a professional mechanic due to the complexity of transmission work.

7. How much does it typically cost to repair the line pressure solenoid valve fault (P0745) in a 2004 Nissan Altima Sedan?

The cost of repair can vary depending on the extent of the issue, but it can range from $300 to $800 including parts and labor.

8. Will resetting the OBDII code P0745 in my 2004 Nissan Altima Sedan make the issue go away?

Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the fault.

9. Are there any preventive maintenance tips to avoid OBDII code P0745 in a 2004 Nissan Altima Sedan?

Regularly checking and maintaining proper transmission fluid levels, changing the fluid at recommended intervals, and addressing any transmission issues promptly can help prevent this fault.

10. How long does it take to repair the line pressure solenoid valve fault (P0745) in a 2004 Nissan Altima Sedan?

The repair time can vary depending on the mechanic's experience and workload, but it typically takes around 2 to 4 hours to replace the line pressure solenoid valve.