AutoCodes – Toyota – C2304 Toyota

C2304 Toyota Code - Open Or Short Circuit In U Phase

Quick Answer

The Shift Control Actuator consists of the parking lock motor and the rotation angle sensor. Common causes include Faulty Auxiliary Battery, Faulty Transmission Control ECU Assembly, Faulty Shift Control Actuator. 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: C2304 Toyota indicates Open Or Short Circuit In U Phase.
Common causes: Common causes include Faulty Auxiliary Battery, Faulty Transmission Control ECU Assembly, Faulty Shift Control Actuator.
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 7,153

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 C2304 Toyota Description

The Shift Control Actuator consists of the parking lock motor and the rotation angle sensor. The Transmission Control ECU receives a P position switch signal from the Power Management Control ECU (HV CPU) and activates the parking lock motor by controlling current, causing the parking lock mechanism to switch. The Transmission Control ECU outputs these DTCs when it detects a malfunction in the parking lock motor system.

OBDII Code C2304 Toyota - Open Or Short Circuit In U Phase - AutoCodes.com — C2304 Toyota Code - Open Or Short Circuit In U Phase

What does this mean?

What are the Possible Causes of the DTC C2304 Toyota?

Faulty Auxiliary Battery
Faulty Transmission Control ECU Assembly
Faulty Shift Control Actuator
Shift Control Actuator harness is open or shorted
Shift Control Actuator circuit poor electrical connection

How to Fix the DTC C2304 Toyota?

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 C2304 Toyota 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 C2304 Toyota code?

Need more information on how to fix the C2304 Toyota code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C2304 Toyota code diagnosed by a professional: Find a repair shop in your area

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 C2304 Toyota Code

1. What are the common symptoms of OBDII code C2304 in a Toyota vehicle?

- Common symptoms include issues with the vehicle's electrical system, such as erratic behavior of lights, power windows, or other electronic components.

2. What does the OBDII code C2304 Toyota "Open Or Short Circuit In U Phase" indicate?

- This code indicates a potential open or short circuit in the U phase of the vehicle's electrical system, affecting normal operation.

3. What are possible causes of OBDII code C2304 in a Toyota?

- The code can be caused by damaged wiring, faulty connectors, or issues with the vehicle's electrical components related to the U phase.

4. How can I diagnose the source of OBDII code C2304 in my Toyota?

- To diagnose the issue, you can use a multimeter to check for continuity and resistance along the U phase circuit, inspect wiring for damage, and test electrical components for proper functionality.

5. Can I drive my Toyota with OBDII code C2304 present?

- It is not recommended to drive the vehicle with this code present, as it can lead to further electrical issues and potentially affect the vehicle's performance.

6. What are the repair options for OBDII code C2304 in a Toyota?

- Repair options include repairing or replacing damaged wiring, connectors, or electrical components related to the U phase, as well as resetting the code with an OBDII scanner after the issue is resolved.

7. How serious is OBDII code C2304 in a Toyota?

- While the code itself may not cause immediate harm to the vehicle, it can lead to electrical malfunctions and should be addressed promptly to prevent further issues.

8. Can I reset OBDII code C2304 in my Toyota without fixing the underlying issue?

- While you can reset the code with an OBDII scanner, it is important to address the underlying issue causing the code to prevent recurring problems.

9. How much does it typically cost to repair OBDII code C2304 in a Toyota?

- The cost of repair can vary depending on the extent of the issue, but it may involve labor costs for diagnosing and fixing the electrical problem, as well as the cost of any necessary parts.

10. Are there any preventive measures to avoid OBDII code C2304 in a Toyota?

- Regularly inspecting the vehicle's electrical system, avoiding water damage to wiring, and ensuring proper maintenance can help prevent issues that may trigger this code.