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P0746 Mitsubishi Code - Hydraulic Control System Function Abnormal

Quick Answer

The P0746 code for Mitsubishi vehicles indicates that there is an issue with the hydraulic control system's function, specifically an abnormality. Common causes include Low transmission fluid levels, Dirty or contaminated transmission fluid, Faulty transmission control module. 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 levels, Dirty or contaminated transmission fluid, Faulty transmission control module.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 09, 2024
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Code P0746 Mitsubishi Description

The P0746 code for Mitsubishi vehicles indicates that there is an issue with the hydraulic control system's function, specifically an abnormality. In automatic transmissions, the hydraulic control system plays a crucial role in regulating the flow of transmission fluid to engage and disengage various clutches and bands within the transmission. This system is responsible for ensuring smooth gear shifts and overall transmission performance.

OBDII Code P0746 Mitsubishi - Hydraulic Control System Function Abnormal
P0746 Mitsubishi Code - Hydraulic Control System Function Abnormal

Common Causes of P0746 Mitsubishi

  1. Low transmission fluid levels
  2. Dirty or contaminated transmission fluid
  3. Faulty transmission control module
  4. Malfunctioning solenoid
  5. Internal transmission damage

Symptoms of P0746 Mitsubishi

  1. Erratic shifting patterns
  2. Harsh or delayed gear engagement
  3. Transmission slipping
  4. Reduced fuel efficiency
  5. Illumination of the check engine light

How to Fix P0746 Mitsubishi

  1. Begin by checking the transmission fluid level and condition. If low, top it up to the recommended level and inspect for any leaks.
  2. Perform a transmission fluid flush and filter replacement to ensure clean and proper fluid flow within the hydraulic control system.
  3. Test and potentially replace the transmission control module if found to be faulty.
  4. Inspect and test the solenoids within the hydraulic control system, replacing any that are malfunctioning.
  5. If none of the above steps resolve the issue, a more in-depth transmission inspection may be necessary, potentially requiring internal repairs or component replacements.

Cost to Fix P0746 Mitsubishi

The typical repair costs for addressing a P0746 code in a Mitsubishi vehicle can vary depending on the specific cause of the issue and the extent of repairs needed. On average, the repair costs for this issue could range from $200 to $800, including parts and labor. Keep in mind that these are rough estimates, and actual costs may vary based on the severity of the problem and the rates charged by auto repair shops in your area. Additionally, diagnostic time and labor rates can impact the final repair bill, so it's advisable to consult with a professional technician for a more accurate cost estimate.

What does this mean?

Tech Notes for P0746 Mitsubishi

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.

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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.

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