Engine-CodesKIA – P0746 KIA

P0746 KIA Code - Variable Forced Solenoid Circuit

Quick Answer

The P0746 diagnostic trouble code (DTC) for Kia vehicles refers to a problem with the Variable Forced Solenoid Circuit. Common causes include Faulty variable forced solenoid, Wiring or electrical connection issues, Low transmission fluid level or dirty fluid. 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 Faulty variable forced solenoid, Wiring or electrical connection issues, Low transmission fluid level or dirty fluid.
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.
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0746 KIA Description

The P0746 diagnostic trouble code (DTC) for Kia vehicles refers to a problem with the Variable Forced Solenoid Circuit. This code indicates an issue with the solenoid that controls the variable forced mechanism in the transmission system. The variable forced solenoid is responsible for regulating the flow of transmission fluid, which in turn affects the shifting of gears and overall performance of the vehicle.

OBDII Code P0746 KIA - Variable Forced Solenoid Circuit
P0746 KIA Code - Variable Forced Solenoid Circuit

Common Causes of P0746 KIA

  1. Faulty variable forced solenoid
  2. Wiring or electrical connection issues
  3. Low transmission fluid level or dirty fluid
  4. Mechanical damage to the transmission system
  5. Software or programming issues

Symptoms of P0746 KIA

  1. Hesitation or jerking during gear shifts
  2. Delayed engagement when accelerating
  3. Erratic shifting patterns
  4. Transmission slipping
  5. Check Engine light illuminated on the dashboard

How to Fix P0746 KIA

  1. Begin by performing a thorough diagnostic scan to confirm the P0746 code and identify any other related issues.
  2. Inspect the variable forced solenoid and its wiring for any visible damage or corrosion. Replace any damaged components.
  3. Check the transmission fluid level and condition. Top up or replace the fluid if necessary.
  4. Test the transmission system for proper operation and clear the DTC from the vehicle's computer.
  5. Take the vehicle for a test drive to ensure that the transmission is functioning correctly and that the P0746 code does not reappear.

Cost to Fix P0746 KIA

The cost of repairing a P0746 code can vary depending on the extent of the damage and the specific components that need to be replaced. On average, the repair cost for this issue can range from $200 to $500, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary significantly based on location, the make and model of the vehicle, and the expertise of the technicians. It's recommended to obtain a detailed estimate from a reputable auto repair shop before proceeding with the repairs.

Tech Notes for P0746 KIA

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.

When is the Code Detected?

The gear required by the Engine Control Module (ECM) does not match the actual gear when driving

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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 Kia’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 owner’s manual, and address any transmission issues promptly.

Discuss the causes and fixes for P0746 KIA OBDII Code

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