U1146 Dodge Code - Lost Communication With External Memory
Quick Answer
The first time the vehicle is started, the Transmission Control Module (TCM) receives hydraulic calibration data from an external EEPROM (located in the transmission) and stores this information in the EEPROM of the TCM. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection. 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
- U1146 Dodge indicates Lost Communication With External Memory.
- Common causes
- Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module (TCM) harness is open or shorted, Transmission Control Module (TCM) circuit poor electrical connection.
- 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 U1146 Dodge Description
What are the Possible Causes of the DTC U1146 Dodge?
- Faulty Transmission Control Module (TCM)
- Transmission Control Module (TCM) harness is open or shorted
- Transmission Control Module (TCM) circuit poor electrical connection
How to Fix the DTC U1146 Dodge?
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 U1146 Dodge 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 U1146 Dodge code?
Need more information on how to fix the U1146 Dodge code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the U1146 Dodge code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about U1146 Dodge Code
1. What does the OBDII code U1146 mean on a Dodge vehicle?
The U1146 code indicates "Lost Communication With External Memory," meaning the vehicle’s control modules are having trouble communicating with an external memory module.
2. What are the common symptoms of the U1146 code in a Dodge?
Symptoms may include an illuminated check engine light, erratic electrical system behavior, loss of certain vehicle functions, or failure to start.
3. What causes the U1146 code to appear?
Common causes include wiring issues, faulty external memory modules, problems with the CAN bus network, or a malfunctioning control module.
4. Can a faulty battery cause the U1146 code in a Dodge?
Yes, a weak or failing battery can disrupt communication between modules, potentially triggering the U1146 code.
5. How can I diagnose the U1146 code on my Dodge?
Start by checking the wiring and connectors for damage or corrosion, inspecting the external memory module, and testing the CAN bus network for continuity or short circuits.
6. Is it safe to drive with the U1146 code on a Dodge?
It depends on the severity of the issue. While the vehicle may still operate, certain systems could malfunction, potentially compromising safety.
7. How do I fix the U1146 code on my Dodge?
Repairs may include replacing damaged wiring, cleaning or reconnecting corroded connectors, reprogramming the external memory module, or replacing a faulty module if necessary.
8. Can a software update fix the U1146 code on a Dodge?
In some cases, a software update from the manufacturer can resolve communication issues between modules and clear the code.
9. How much does it cost to repair the U1146 code on a Dodge?
Repair costs vary depending on the issue but typically range from $100 for basic wiring repairs to $500 or more if a module replacement is required.
10. Can disconnecting the battery clear the U1146 code on a Dodge?
Disconnecting the battery may temporarily clear the code, but if the underlying issue isn’t resolved, the code will likely return.
Discuss the causes and fixes for U1146 Dodge OBDII Code
Code U1146 Dodge comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
