AutoCodes – Hyundai – P0780 Hyundai

P0780 Hyundai Code - Shift Control System Fault

Quick Answer

The Transmission Control Module (TCM) monitors the transmission mechanical shifting through various sensors. Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shifting 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: P0780 Hyundai indicates Shift Control System Fault.
Common causes: Common causes include Low transmission fluid level, Dirty transmission fluid, Faulty shifting 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 6,158

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 Jun 14, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0780 Hyundai Description

The Transmission Control Module (TCM) monitors the transmission mechanical shifting through various sensors. This malfunction is detected when the A/T does not shift as instructed by the TCM. This is not caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking,improper solenoid valve operation, etc.

OBDII Code P0780 Hyundai - Shift Control System Fault - AutoCodes.com — P0780 Hyundai Code - Shift Control System Fault

What does this mean?

What are the Possible Causes of the DTC P0780 Hyundai?

Low transmission fluid level
Dirty transmission fluid
Faulty shifting solenoid valve
Shifting solenoid valve harness is open or shorted
Shifting solenoid valve circuit poor electrical connection

How to Fix the DTC P0780 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0780 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 P0780 Hyundai Code

1. What does the OBDII code P0780 mean for a Hyundai?

P0780 indicates a "Shift Control System Fault," meaning the transmission is struggling to shift gears properly due to a mechanical, electrical, or hydraulic issue.

2. What are the common symptoms of a P0780 code in a Hyundai?

Symptoms may include harsh or delayed shifting, a slipping transmission, the vehicle stuck in one gear, reduced fuel efficiency, or the Check Engine Light turning on.

3. What causes the P0780 code in a Hyundai?

Common causes include a faulty shift solenoid, low or dirty transmission fluid, damaged wiring or connectors in the transmission system, or internal transmission mechanical failures.

4. Can low transmission fluid trigger the P0780 code in a Hyundai?

Yes, low or contaminated transmission fluid can cause shifting issues and trigger the P0780 code, as it affects hydraulic pressure and solenoid operation.

5. How is the P0780 code diagnosed in a Hyundai?

A mechanic will use an OBDII scanner to confirm the code, inspect the transmission fluid, test the shift solenoids and wiring, and potentially perform a deeper inspection of the transmission system.

6. Can I drive my Hyundai with a P0780 code?

Driving with a P0780 code is not recommended as it can lead to further transmission damage or unsafe driving conditions due to shifting issues.

7. How do you fix the P0780 code on a Hyundai?

Repairs may include replacing the shift solenoid, cleaning or replacing the transmission fluid, repairing damaged wiring or connectors, or rebuilding the transmission in severe cases.

8. How much does it cost to fix a Hyundai with a P0780 code?

The repair cost varies widely, from $100â€“$300 for fluid changes or solenoid replacement to over $1,000 for transmission rebuilds or replacements.

9. Can a P0780 code be caused by an electrical issue in a Hyundai?

Yes, damaged wiring, corroded connectors, or issues with the transmission control module (TCM) can cause electrical faults that lead to the P0780 code.

10. How can I prevent the P0780 code from occurring in my Hyundai?

Regular transmission maintenance, such as checking and replacing fluid, addressing shifting problems early, and ensuring the electrical system is in good condition, can help prevent this code.