AutoCodes – Hyundai – P0746 Hyundai

P0746 Hyundai Code - Pressure Control Solenoid Performance or Stuck Off

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 Hyundai indicates Pressure Control Solenoid Performance or Stuck Off.
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 5,582

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 Hyundai 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 Hyundai - Pressure Control Solenoid Performance or Stuck Off - AutoCodes.com — P0746 Hyundai Code - Pressure Control Solenoid Performance or Stuck Off

What does this mean?

What are the Possible Causes of the DTC P0746 Hyundai?

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 Hyundai?

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 Hyundai 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 Hyundai Code

1. What does the OBDII code P0746 mean on a Hyundai?

P0746 indicates an issue with the Pressure Control Solenoid, which may be stuck off or performing outside its expected range. This solenoid helps regulate hydraulic pressure in the transmission.

2. What are the symptoms of the P0746 code in a Hyundai?

Common symptoms include harsh or delayed shifting, transmission slipping, poor acceleration, reduced fuel efficiency, or the vehicle going into limp mode. The Check Engine Light will also illuminate.

3. What causes the P0746 code in a Hyundai?

Possible causes include a malfunctioning pressure control solenoid, dirty or degraded transmission fluid, a clogged transmission filter, internal transmission issues, or damaged wiring or connectors in the solenoid circuit.

4. Can I drive a Hyundai with the P0746 code?

While the vehicle might still run, driving with this code may worsen transmission damage. Itâ€™s best to address the issue as soon as possible to avoid costly repairs.

5. How is the P0746 code diagnosed in a Hyundai?

A mechanic will use an OBDII scanner to confirm the code, inspect the transmission fluid condition, check the solenoid and related wiring, and possibly perform a hydraulic pressure test.

6. How do you fix the P0746 code on a Hyundai?

Repairs may involve replacing the pressure control solenoid, flushing and refilling the transmission fluid, replacing the transmission filter, or repairing damaged wiring or connectors.

7. How much does it cost to fix the P0746 code in a Hyundai?

The cost varies depending on the repair. Replacing a pressure control solenoid typically costs $200â€“$400, while a full transmission rebuild may exceed $2,000.

8. Can dirty transmission fluid cause the P0746 code in a Hyundai?

Yes, dirty or degraded transmission fluid can restrict solenoid operation and lead to this code. Flushing and replacing the fluid may resolve the issue in some cases.

9. Does the P0746 code always mean the solenoid is bad?

No, the issue could also stem from wiring problems, transmission fluid issues, or internal transmission damage. Proper diagnosis is essential.

10. How can I prevent the P0746 code from occurring in my Hyundai?

Regularly maintain your transmission by changing the fluid and filter at the recommended intervals, and address any transmission issues promptly to prevent further damage.