AutoCodes – Infiniti – P0745 2005 Infiniti G35

P0745 2005 Infiniti G35 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 2005 Infiniti G35 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 3,386

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 29, 2019

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0745 2005 Infiniti G35 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 2005 Infiniti G35 - Line Pressure Solenoid Valve Fault - AutoCodes.com — P0745 2005 Infiniti G35 Code - Line Pressure Solenoid Valve Fault

What does this mean?

What are the Possible Causes of the DTC P0745 2005 Infiniti G35?

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 2005 Infiniti G35?

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 P0745 2005 Infiniti G35 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 2005 Infiniti G35 Code

1. What does the OBDII code P0745 mean on a 2005 Infiniti G35?

P0745 indicates a "Line Pressure Solenoid Valve Fault," meaning the transmission control module has detected an issue with the solenoid responsible for regulating hydraulic pressure in the transmission.

2. What are the common symptoms of code P0745 in a 2005 Infiniti G35?

Symptoms may include harsh or erratic shifting, transmission slippage, a delayed engagement when shifting gears, and the Check Engine Light being illuminated.

3. What causes the P0745 code to appear on a 2005 Infiniti G35?

Common causes include a faulty line pressure solenoid, damaged wiring or connectors, low transmission fluid, or internal transmission issues such as a clogged valve body.

4. Can I drive my 2005 Infiniti G35 with a P0745 code?

Driving with a P0745 code is not recommended as it can lead to further damage to the transmission and unsafe driving conditions due to erratic shifting.

5. How do I diagnose the P0745 code on a 2005 Infiniti G35?

Diagnosis involves checking the transmission fluid level and condition, inspecting the solenoid and its wiring, testing the solenoid's resistance, and using a scan tool to monitor transmission pressure data.

6. How do I fix the P0745 code on a 2005 Infiniti G35?

Repairs may include replacing the line pressure solenoid, repairing damaged wiring or connectors, performing a transmission fluid flush, or addressing internal transmission problems.

7. How much does it cost to repair a P0745 code on a 2005 Infiniti G35?

The cost can vary, with solenoid replacement typically ranging from $200 to $500, while more extensive repairs like a valve body or transmission rebuild can cost significantly more.

8. Can low transmission fluid cause the P0745 code on a 2005 Infiniti G35?

Yes, low or contaminated transmission fluid can affect hydraulic pressure, potentially triggering the P0745 code.

9. How do I prevent the P0745 code from occurring on my 2005 Infiniti G35?

Regular transmission maintenance, such as fluid changes and inspections, can help prevent issues with the line pressure solenoid and related components.

10. Does the P0745 code require a transmission replacement on a 2005 Infiniti G35?

Not necessarily. While major transmission issues could cause the code, itâ€™s often resolved by addressing the solenoid, wiring, or fluid-related problems.