AutoCodes – KIA – P0704 KIA

P0704 KIA Code - Clutch Switch Signal Error

Quick Answer

When the clutch pedal is depress the voltage signal from the clutch switch to the Engine Control Module (ECM) is low. Common causes include Faulty Clutch Switch, Misadjusted Clutch Switch, Clutch Switch harness is open or shorted. 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: P0704 KIA indicates Clutch Switch Signal Error.
Common causes: Common causes include Faulty Clutch Switch, Misadjusted Clutch Switch, Clutch Switch harness is open or shorted.
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 15,079

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0704 KIA Description

When the clutch pedal is depress the voltage signal from the clutch switch to the Engine Control Module (ECM) is low. If the ECM does not see this change from high to low when the vehicle is over 0 mph, the ECM sets code P0704.

OBDII Code P0704 KIA - Clutch Switch Signal Error - AutoCodes.com — P0704 KIA Code - Clutch Switch Signal Error

What does this mean?

What are the Possible Causes of the DTC P0704 KIA?

Faulty Clutch Switch
Misadjusted Clutch Switch
Clutch Switch harness is open or shorted
Clutch Switch circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0704 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

Check clutch switch adjustment, the switch should open and close when the clutch pedal is depress. If the switch is properly adjusted, replaced the clutch switch to resolve problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0704 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.

Need more information about the P0704 KIA code?

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Need Help with the Code?

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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 P0704 KIA Code

1. What does the OBDII code P0704 mean on a Kia?

P0704 indicates a "Clutch Switch Signal Error," meaning the Engine Control Module (ECM) is not receiving the expected input from the clutch pedal position switch.

2. What are the common symptoms of a P0704 code on a Kia?

Common symptoms include difficulty starting the engine, the cruise control not working, reduced drivability, or the check engine light illuminating.

3. What causes the P0704 code to appear in a Kia?

The P0704 code is typically caused by a faulty clutch pedal position switch, damaged wiring or connectors, or a malfunction in the ECM.

4. Can a P0704 code cause drivability issues in a Kia?

Yes, it can cause problems such as difficulty starting the car, inability to use cruise control, or erratic engine performance.

5. How do I diagnose a P0704 code on my Kia?

Start by inspecting the clutch pedal position switch for damage or wear, checking the wiring and connectors, and testing the switch's electrical continuity with a multimeter.

6. How do I fix the P0704 code on a Kia?

Repairs may include replacing the faulty clutch pedal position switch, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.

7. Can I drive my Kia with a P0704 code?

While the car may still be drivable, it is not recommended as starting issues or cruise control malfunctions could worsen over time.

8. How much does it cost to repair a P0704 code on a Kia?

Repair costs can range from $50 to $200, depending on whether the clutch switch needs to be replaced or if wiring repairs are required.

9. Will clearing the P0704 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but it will not resolve the underlying issue and the code will likely return.

10. Can a bad clutch switch damage other components in my Kia?

A faulty clutch switch alone usually won't damage other components, but ignoring the issue may lead to complications like starter motor stress or ECM errors.