AutoCodes – Nissan – P0745 2003 Nissan Altima Sedan

P0745 2003 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 2003 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 29,007

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 2003 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 2003 Nissan Altima Sedan - Line Pressure Solenoid Valve Fault - AutoCodes.com — P0745 2003 Nissan Altima Sedan Code - Line Pressure Solenoid Valve Fault

What does this mean?

What are the Possible Causes of the DTC P0745 2003 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 2003 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 2003 Nissan Altima:
2003 Nissan Altima Factory Service Bulletin OBDII Code P0745

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0745 2003 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 2003 Nissan Altima Sedan Code

1. What does OBDII code P0745 mean for a 2003 Nissan Altima Sedan?

The code P0745 indicates a fault with the Line Pressure Solenoid Valve in the transmission of a 2003 Nissan Altima Sedan.

2. What are the common symptoms of a Line Pressure Solenoid Valve fault (P0745) in a 2003 Nissan Altima Sedan?

Common symptoms include harsh shifting, transmission slippage, decreased fuel efficiency, and the illumination of the Check Engine Light.

3. What are the possible causes of OBDII code P0745 in a 2003 Nissan Altima Sedan?

The code P0745 can be triggered by issues such as a faulty Line Pressure Solenoid Valve, wiring problems, low transmission fluid levels, or internal transmission damage.

4. How serious is a Line Pressure Solenoid Valve fault (P0745) in a 2003 Nissan Altima Sedan?

Ignoring this fault can lead to further damage to the transmission system, potentially resulting in more severe and costly repairs down the line.

5. Can I continue to drive my 2003 Nissan Altima Sedan with OBDII code P0745 present?

It is not recommended to continue driving the vehicle with the P0745 code active, as it can cause further damage to the transmission and potentially leave you stranded.

6. How can I diagnose and repair OBDII code P0745 in my 2003 Nissan Altima Sedan?

Diagnosis typically involves inspecting the Line Pressure Solenoid Valve, checking for wiring issues, and ensuring proper transmission fluid levels. Repairs may involve replacing the faulty solenoid valve or addressing any wiring problems.

7. Can I reset the OBDII code P0745 in my 2003 Nissan Altima Sedan myself?

While you can clear the code with an OBDII scanner, it is crucial to address the underlying issue causing the fault to prevent it from reoccurring.

8. How much does it cost to repair OBDII code P0745 in a 2003 Nissan Altima Sedan?

The cost of repair can vary depending on the specific cause of the fault, but it typically involves the cost of parts and labor for solenoid valve replacement or wiring repairs.

9. Are there any preventive measures to avoid OBDII code P0745 in a 2003 Nissan Altima Sedan?

Regular maintenance, such as checking and changing transmission fluid as recommended, can help prevent issues that may lead to Line Pressure Solenoid Valve faults.

10. Can a DIY enthusiast fix OBDII code P0745 in a 2003 Nissan Altima Sedan?

While some experienced DIY enthusiasts may be able to tackle solenoid valve replacement or basic wiring repairs, it is recommended to consult a professional mechanic for this type of transmission-related issue.