AutoCodes – KIA – P0748 KIA

P0748 KIA Code - Linear Solenoid Electric

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 Faulty line pressure solenoid valve, Line pressure solenoid valve harness is open or shorted, Line pressure solenoid valve circuit poor electrical connection. 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: P0748 KIA indicates Linear Solenoid Electric.
Common causes: Common causes include Faulty line pressure solenoid valve, Line pressure solenoid valve harness is open or shorted, Line pressure solenoid valve circuit poor electrical connection.
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 37,572

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 Jan 29, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0748 KIA 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 P0748 KIA - Linear Solenoid Electric - AutoCodes.com — P0748 KIA Code - Linear Solenoid Electric

What does this mean?

What are the Possible Causes of the DTC P0748 KIA?

Faulty line pressure solenoid valve
Line pressure solenoid valve harness is open or shorted
Line pressure solenoid valve circuit poor electrical connection
Low transmission fluid level
Dirty transmission fluid

How to Fix the DTC P0748 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 P0748 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 P0748 KIA Code

1. What are the common symptoms of OBDII code P0748 in a KIA related to the Linear Solenoid Electric?

Common symptoms include erratic shifting, transmission slipping, poor fuel economy, and the Check Engine Light illuminating on the dashboard.

2. What are the possible causes of OBDII code P0748 in a KIA indicating an issue with the Linear Solenoid Electric?

Potential causes can include a faulty linear solenoid, low transmission fluid level, dirty transmission fluid, electrical issues, or a malfunctioning transmission control module.

3. How can I diagnose OBDII code P0748 in my KIA that points to a problem with the Linear Solenoid Electric?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, checking the transmission fluid level and condition, inspecting the wiring and connectors related to the linear solenoid, and performing a thorough visual inspection of the transmission components.

4. Is it safe to continue driving my KIA with OBDII code P0748 related to the Linear Solenoid Electric issue?

It is not recommended to drive the vehicle with this code present, as it can lead to further damage to the transmission and potentially result in a complete transmission failure. It's best to address the issue promptly.

5. Can OBDII code P0748 in a KIA be reset, or does it require immediate repair?

While the code can be reset using an OBDII scanner, it is crucial to address the underlying issue causing the code (such as a faulty linear solenoid) to prevent further transmission problems. Resetting the code without fixing the problem may lead to recurring issues.

6. Are there any DIY repair tips for fixing OBDII code P0748 related to the Linear Solenoid Electric in a KIA?

DIY repair options may include checking and topping up the transmission fluid, inspecting and cleaning electrical connectors, and ensuring proper wiring connections. However, for more complex issues like a faulty linear solenoid, it is best to seek professional help.

7. How much does it typically cost to repair OBDII code P0748 in a KIA due to an issue with the Linear Solenoid Electric?

The cost of repair can vary depending on the root cause of the problem, the extent of the damage, and the labor rates in your area. Repairs involving the linear solenoid or other major transmission components can range from a few hundred to over a thousand dollars.

8. Can a KIA dealership service center help with diagnosing and repairing OBDII code P0748 related to the Linear Solenoid Electric?

Yes, a KIA dealership service center or a reputable automotive repair shop with experience in KIA vehicles should be able to diagnose and repair issues related to this OBDII code effectively.

9. How long does it take to repair OBDII code P0748 in a KIA caused by a problem with the Linear Solenoid Electric?

The repair time can vary depending on the specific issue and the availability of parts. Simple fixes like cleaning connectors may take less than an hour, while replacing a faulty linear solenoid can take several hours or more.

10. Can regularly servicing the transmission help prevent OBDII code P0748 related to the Linear Solenoid Electric from occurring in my KIA?

Regular transmission servicing, including fluid changes and inspections, can help maintain the health of the transmission system and potentially prevent issues like P0748. It's essential to follow the manufacturer's recommended maintenance schedule to prevent unexpected problems.