AutoCodes – Generic – P0745

P0745 Code - Pressure Control Solenoid Malfunction 'A'

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 indicates Pressure Control Solenoid Malfunction 'A'.
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 76,652

How popular is this code, among other codes? Medium

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 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 - Pressure Control Solenoid Malfunction 'A' - AutoCodes.com — P0745 Code - Pressure Control Solenoid Malfunction 'A'

What does this mean?

What are the Possible Causes of the DTC P0745?

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?

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 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 Makes

P0745 Acura — Pressure Control Solenoid Malfunction
P0745 BMW — Pressure Control Solenoid
P0745 Ford — Pressure Control Solenoid Malfunction
P0745 Hyundai — Pressure Control Solenoid Valve 'A'
P0745 Infiniti — Line Pressure Solenoid Valve Fault
P0745 Jeep — Pressure Control Solenoid Malfunction
P0745 KIA — Pressure Control Solenoid Valve 'A'
P0745 Lincoln — Pressure Control Solenoid Malfunction
P0745 Mazda — Pressure Control Solenoid Malfunction
P0745 Mercedes-Benz — Pressure Control Solenoid Malfunction
P0745 Mercury — Pressure Control Solenoid Malfunction
P0745 MINI — Pressure Control Solenoid
P0745 Mitsubishi — Line Pressure Solenoid Valve Fault
P0745 Nissan — Line Pressure Solenoid Valve Fault
P0745 Suzuki — Pressure Control Solenoid Electrical Malfunction

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 Code

1. What are the common symptoms of OBDII code P0745 (Pressure Control Solenoid Malfunction 'A')?

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

2. What are the possible causes of OBDII code P0745?

- The code P0745 can be triggered by issues such as a faulty pressure control solenoid, low transmission fluid levels, electrical problems, or a malfunctioning transmission control module.

3. How serious is the OBDII code P0745?

- The code P0745 should be addressed promptly to prevent further damage to the transmission. Ignoring this issue can lead to more severe transmission problems and potentially costly repairs.

4. Can I continue driving with OBDII code P0745 present?

- It is not recommended to continue driving with the code P0745 active, as it can cause further damage to the transmission. It is best to have the issue diagnosed and repaired as soon as possible.

5. How is OBDII code P0745 diagnosed?

- Diagnosis typically involves using a scan tool to retrieve the code, checking the transmission fluid level and condition, and conducting further testing to pinpoint the exact cause of the pressure control solenoid malfunction.

6. What are some repair tips for fixing OBDII code P0745?

- Repair tips may include replacing the pressure control solenoid, checking and topping up transmission fluid, inspecting electrical connections, and ensuring the transmission control module is functioning correctly.

7. How much does it cost to repair OBDII code P0745?

- Repair costs for OBDII code P0745 can vary depending on the underlying issue, parts needed for replacement, and labor costs. It is advisable to consult with a professional mechanic for an accurate estimate.

8. Can I reset the OBDII code P0745 myself?

- While you can clear the code using an OBDII scanner, it is crucial to address the root cause of the issue to prevent the code from reoccurring. Resetting the code without fixing the problem will not resolve the underlying malfunction.

9. Are there any preventive measures to avoid OBDII code P0745?

- Regular maintenance, such as checking and changing transmission fluid at recommended intervals, can help prevent issues like the pressure control solenoid malfunction that triggers code P0745.

10. How long does it typically take to repair OBDII code P0745?

- The repair time for OBDII code P0745 can vary depending on the specific issue causing the malfunction. It is best to consult with a professional mechanic to determine the exact timeline for the repair.