U1147 RAM Code - Additional CAN Interior ECU Detected
Quick Answer
The Diagnostic Trouble Code (DTC) sets when the Totally Integrated Power Module (TIPM) detects an additional Controller Area Network (CAN) Interior Bus module and requires reprogramming. Common causes include Additional Module Added/Removed From the CAN Interior Bus Network, Faulty Totally Integrated Power Module (TIPM). 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
- U1147 RAM indicates Additional CAN Interior ECU Detected.
- Common causes
- Common causes include Additional Module Added/Removed From the CAN Interior Bus Network, Faulty Totally Integrated Power Module (TIPM).
- 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 U1147 RAM Description
What are the Possible Causes of the DTC U1147 RAM?
- Additional Module Added/Removed From the CAN Interior Bus Network
- Faulty Totally Integrated Power Module (TIPM)
How to Fix the DTC U1147 RAM?
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 U1147 RAM 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 U1147 RAM code?
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Frequently Asked Questions about U1147 RAM Code
1. What does the OBDII code U1147 mean on a RAM vehicle?
The U1147 code indicates that an additional CAN Interior ECU (Electronic Control Unit) has been detected, which may interfere with normal communication between modules on the vehicle's CAN bus.
2. What are the common symptoms of the U1147 code in a RAM vehicle?
Symptoms may include warning lights on the dashboard, erratic behavior of interior electronic systems, or loss of communication with certain modules.
3. What causes the U1147 code to appear in a RAM vehicle?
The code can be triggered by an unapproved aftermarket module, a faulty ECU, wiring issues, or software inconsistencies in the CAN bus communication system.
4. Can an aftermarket accessory cause the U1147 code in a RAM vehicle?
Yes, aftermarket accessories like remote starters or custom infotainment systems can interfere with the CAN communication network and trigger this code.
5. How do you diagnose the U1147 code in a RAM vehicle?
Diagnosis involves scanning for additional codes, inspecting the CAN bus wiring and connections, and identifying any non-factory modules installed in the vehicle.
6. Is the U1147 code serious, and can I still drive with it?
While the vehicle may still be drivable, the code can lead to improper functioning of critical systems. It is best to address the issue promptly to avoid potential safety concerns.
7. How is the U1147 code fixed in a RAM vehicle?
Repairs may involve removing unauthorized aftermarket modules, updating ECU software, repairing damaged wiring, or replacing a faulty ECU.
8. Can a dead or weak battery trigger the U1147 code?
Yes, a weak or dead battery can cause communication errors on the CAN bus, leading to this code. Testing and replacing the battery may resolve the issue.
9. What tools are needed to troubleshoot the U1147 code in a RAM vehicle?
A professional OBDII scanner with CAN bus diagnostics, a multimeter, and wiring diagrams are essential for diagnosing and fixing the code.
10. Will clearing the U1147 code with a scan tool permanently fix the issue?
Clearing the code may temporarily remove it, but if the underlying issue is not resolved, the code will likely return. Proper diagnosis and repair are necessary.
Discuss the causes and fixes for U1147 RAM OBDII Code
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I don't take my vehicle to anyone to fix. There is nothing in it that I am unable to repair and this information isn't enough. I would like to know what needs to be reprogrammed in the TIPM so I can get this program or write it and then reprogram it. Seriously, the dealerships can't be trusted and I have personally experienced why several times. I can't trust any of the mechanics shops because if they do average or even marginally okay work, they will charge thousands and it's not worth that. Plus, this vehicle really isn't that complex that only a mechanic that has a job at a dirty garage can fix it. If they can do it, so can I. That's coming from a Navy veteran and college graduate that worked on military aircraft electronics. I promise, the aircraft are far more complex than this truck. If anything, the truck is more difficult because there is so much bogus information floating around the internet.
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