AutoCodes – Mitsubishi – P0746 Mitsubishi

P0746 Mitsubishi Code - Hydraulic Control System Function Abnormal

Quick Answer

The Pressure Control (PC) Solenoid Valve is 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: P0746 Mitsubishi indicates Hydraulic Control System Function Abnormal.
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 25,525

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 Jul 30, 2022

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0746 Mitsubishi Description

The Pressure Control (PC) Solenoid Valve is 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). The Diagnostic Trouble Code (DTC) will be set when the gear required by the Engine Control Module (ECM) does not match the actual gear when driving.

OBDII Code P0746 Mitsubishi - Hydraulic Control System Function Abnormal - AutoCodes.com — P0746 Mitsubishi Code - Hydraulic Control System Function Abnormal

What does this mean?

What are the Possible Causes of the DTC P0746 Mitsubishi?

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 P0746 Mitsubishi?

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 P0746 Mitsubishi 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 P0746 Mitsubishi Code

1. What are the common symptoms of OBDII code P0746 in a Mitsubishi related to the Hydraulic Control System Function Abnormal?

- Common symptoms include harsh shifting, transmission slipping, and the vehicle going into limp mode.

2. What are the possible causes of OBDII code P0746 in a Mitsubishi?

- The code P0746 in a Mitsubishi typically indicates issues with the hydraulic control system, such as a faulty pressure control solenoid valve, low transmission fluid level, or hydraulic system blockages.

3. How can I diagnose OBDII code P0746 in my Mitsubishi?

- Diagnosis involves using a scan tool to read the code, checking the transmission fluid level and condition, inspecting the pressure control solenoid valve, and performing a thorough inspection of the hydraulic system for any blockages or leaks.

4. Can OBDII code P0746 in a Mitsubishi be fixed at home?

- Repairing OBDII code P0746 may require advanced knowledge and tools. It is recommended to consult a professional mechanic to accurately diagnose and repair the issue.

5. Is it safe to continue driving with OBDII code P0746 in a Mitsubishi?

- It is not recommended to continue driving with OBDII code P0746 present in a Mitsubishi, as it can lead to further damage to the transmission and other components. Immediate attention from a qualified mechanic is advised.

6. How much does it typically cost to repair OBDII code P0746 in a Mitsubishi?

- The cost of repairing OBDII code P0746 in a Mitsubishi can vary depending on the underlying issue, parts needed, and labor costs. It is best to obtain a professional diagnosis to get an accurate estimate.

7. Can a DIY enthusiast repair OBDII code P0746 in a Mitsubishi?

- While some enthusiasts may have the skills to attempt repairs related to OBDII code P0746, it is generally recommended to seek assistance from a professional mechanic due to the complexity of transmission systems.

8. Will resetting the OBDII code P0746 in my Mitsubishi solve the issue?

- Resetting the code may temporarily remove the warning light, but it will not fix the underlying problem causing OBDII code P0746. It is crucial to diagnose and repair the root cause to prevent further issues.

9. How long does it take to repair OBDII code P0746 in a Mitsubishi?

- The repair time for OBDII code P0746 in a Mitsubishi can vary depending on the specific issue and the availability of parts. It is best to consult with a mechanic for a more accurate estimate of the repair timeline.

10. Can OBDII code P0746 in a Mitsubishi cause long-term damage if left unrepaired?

- Yes, leaving OBDII code P0746 unaddressed can lead to long-term damage to the transmission system, resulting in costly repairs or even transmission failure. It is crucial to address the issue promptly to prevent further damage.