AutoCodes – KIA – P0746 KIA

P0746 KIA Code - Variable Forced Solenoid Circuit

Quick Answer

The Variable Forced Solenoid regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the Transmission Control Module (TCM). 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 KIA indicates Variable Forced Solenoid Circuit.
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 4,197

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 KIA Description

The Variable Forced Solenoid 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 P0746 KIA - Variable Forced Solenoid Circuit - AutoCodes.com — P0746 KIA Code - Variable Forced Solenoid Circuit

What does this mean?

What are the Possible Causes of the DTC P0746 KIA?

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 KIA?

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 KIA 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 KIA Code

What does the OBD-II code P0746 mean for a Kia vehicle?

P0746 indicates an issue with the variable force solenoid circuit, which controls hydraulic pressure in the transmission for smooth gear shifts.

What are the common symptoms of code P0746 in a Kia?

Symptoms include harsh or delayed shifting, transmission slipping, reduced fuel efficiency, or the vehicle going into "limp" mode.

What causes the P0746 code to appear in a Kia?

Common causes include a faulty variable force solenoid, low transmission fluid, a clogged transmission filter, wiring issues, or internal transmission problems.

Can driving with code P0746 damage my Kiaâ€™s transmission?

Yes, driving with this code can cause further damage to the transmission due to improper hydraulic pressure regulation.

How is the P0746 code diagnosed in a Kia?

A mechanic will inspect the transmission fluid, check the wiring and connectors for the solenoid, and use a scan tool to monitor solenoid operation.

How do I fix the P0746 code on my Kia?

Repairs may include replacing the variable force solenoid, cleaning or replacing the transmission filter, addressing wiring issues, or performing a transmission fluid flush.

Is it expensive to repair the P0746 code in a Kia?

Repair costs vary depending on the issue; solenoid replacement or wiring fixes are typically less expensive than addressing internal transmission problems.

Can low transmission fluid cause the P0746 code in a Kia?

Yes, low or dirty transmission fluid can impair solenoid function and trigger the P0746 code.

What tools are needed to fix the P0746 code in a Kia?

You may need a scan tool, multimeter, and basic automotive tools, but professional diagnosis is recommended for accurate repair.

How can I prevent the P0746 code from occurring in my Kia?

Regularly maintain your transmission by changing the fluid and filter as recommended in the ownerâ€™s manual, and address any transmission issues promptly.