C1304 Code - EPS Control System Malfunction
Quick Answer
The Skid Control ECU communicates with the Power Steering ECU via CAN communication. Common causes include Faulty Electronic Power Steering (EPS) Control System, Faulty Brake Control System. 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
- C1304 indicates EPS Control System Malfunction.
- Common causes
- Common causes include Faulty Electronic Power Steering (EPS) Control System, Faulty Brake Control System.
- 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.
Code C1304 Description
What are the Possible Causes of the DTC C1304?
- Faulty Electronic Power Steering (EPS) Control System
- Faulty Brake Control System
How to Fix the DTC C1304?
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 C1304 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 C1304 code?
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Need Help with the Code?
Get the C1304 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- C1304 Lexus — EPS Control System Malfunction
- C1304 Scion — EPS Control System Malfunction
- C1304 Toyota — EPS Control System Malfunction
Frequently Asked Questions about C1304 Code
1. What does OBDII code C1304 mean?
C1304 indicates a malfunction in the Electric Power Steering (EPS) control system, which affects the vehicle's steering assist functionality.
2. What are the common symptoms of code C1304?
Symptoms include a loss of power steering assist, heavy or unresponsive steering, an illuminated EPS or check engine light, and possible warning messages on the dashboard.
3. What causes code C1304 to trigger?
This code is often caused by a faulty EPS control module, loose or damaged wiring, poor electrical connections, or issues with the steering angle sensor.
4. Can I drive my car with a C1304 code?
You can drive the car, but steering may require significantly more effort, especially at low speeds. It’s recommended to fix the issue promptly for safety.
5. How is code C1304 diagnosed?
A technician will use a scan tool to read the code, inspect the EPS system for wiring or connection issues, and test the EPS control module and related sensors.
6. How do you fix an EPS control system malfunction (C1304)?
Repairs may involve replacing the EPS control module, repairing damaged wiring, cleaning corroded connections, or recalibrating the steering angle sensor.
7. How much does it cost to fix OBDII code C1304?
Repair costs vary depending on the issue but can range from $100 for minor wiring repairs to $1,000 or more if the EPS control module needs replacement.
8. Can a dead battery cause C1304 to appear?
Yes, a weak or dead battery can cause voltage drops that may affect the EPS system and trigger the C1304 code.
9. Does the C1304 code require recalibration after repairs?
Yes, recalibrating the steering angle sensor or EPS system may be necessary after repairs to ensure proper functionality.
10. Can clearing the C1304 code solve the problem?
Clearing the code may turn off the warning temporarily, but if the underlying issue isn’t resolved, the code is likely to return.
Discuss the causes and fixes for C1304 OBDII Code
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