U1004 Code - Controller Area Network Bus Transmit Performance
Quick Answer
The Diagnostic Trouble Code (DTC) sets if the Controller Area Network (CAN) frame does not receive acknowledgment for a predefined amount of time. Common causes include Intermittent Controller Area Network Bus Transmit Performance, Check for other codes, Faulty Anti-lock Brake System (ABS) Module. 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
- U1004 indicates Controller Area Network Bus Transmit Performance.
- Common causes
- Common causes include Intermittent Controller Area Network Bus Transmit Performance, Check for other codes, Faulty Anti-lock Brake System (ABS) Module.
- 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 U1004 Description
What are the Possible Causes of the DTC U1004?
- Intermittent Controller Area Network Bus Transmit Performance
- Check for other codes
- Faulty Anti-lock Brake System (ABS) Module
- Anti-lock Brake System (ABS) Module harness is open or shorted
- Anti-lock Brake System (ABS) Module circuit poor electrical connection
How to Fix the DTC U1004?
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 U1004 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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Get the U1004 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- U1004 Chrysler — Controller Area Network Bus Transmit Performance
- U1004 Dodge — Controller Area Network Bus Transmit Performance
- U1004 Jeep — Controller Area Network Bus Transmit Performance
- U1004 RAM — Controller Area Network Bus Transmit Performance
Frequently Asked Questions about U1004 Code
1. What are common symptoms of OBDII code U1004 (Controller Area Network Bus Transmit Performance)?
- Common symptoms include intermittent or constant communication failures between control modules, warning lights on the dashboard, and issues with vehicle performance.
2. What are possible causes of OBDII code U1004?
- Possible causes include faulty wiring or connections in the Controller Area Network (CAN) bus system, defective control modules, software issues, or a faulty CAN bus network.
3. How can I diagnose OBDII code U1004?
- Diagnosing this code typically involves using a professional OBDII scanner to read the code and identify the specific control module or area of the CAN bus system that is experiencing transmission performance issues.
4. What are some repair tips for OBDII code U1004?
- Repair tips include checking and repairing any damaged wiring or connections in the CAN bus system, ensuring that control modules are functioning properly, and updating software or firmware as needed.
5. Can OBDII code U1004 be fixed without professional help?
- While some simple wiring or connection issues may be resolved by DIY enthusiasts, diagnosing and repairing complex CAN bus problems may require professional help from a mechanic or technician.
6. Is it safe to continue driving with OBDII code U1004 present?
- It is not recommended to continue driving with this code present, as communication issues in the CAN bus system can affect various vehicle functions and potentially lead to safety hazards.
7. How much does it typically cost to repair OBDII code U1004?
- The cost of repairing this code can vary depending on the underlying cause and the extent of the repairs needed. Costs may range from a simple wiring repair to replacing control modules or reprogramming software.
8. Can a software update fix OBDII code U1004?
- In some cases, updating the software or firmware of control modules involved in the CAN bus system can help resolve communication issues and clear the code.
9. How long does it take to repair OBDII code U1004?
- The repair time for this code can vary based on the complexity of the issue and the availability of replacement parts or software updates. Some repairs may be completed within a few hours, while others may take longer.
10. Will resetting the OBDII code U1004 make it go away permanently?
- Resetting the code without addressing the underlying issue will not make it go away permanently. It is important to diagnose and repair the root cause of the problem to prevent the code from reappearing.
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