AutoCodes – Nissan – U0101 2010 Nissan Altima Sedan

U0101 2010 Nissan Altima Sedan Code - Lost Communication with Transmission Control Module

Quick Answer

The Controller Area Network (CAN) is a serial communication line for real-time applications. Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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
U0101 2010 Nissan Altima Sedan indicates Lost Communication with Transmission Control Module .
Common causes
Common causes include Faulty Transmission Control Module (TCM), Transmission Control Module harness is open or shorted, Transmission Control Module 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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 7,041
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Mar 23, 2023
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Code U0101 2010 Nissan Altima Sedan Description

The Controller Area Network (CAN) is a serial communication line for real-time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto a vehicle, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads the required data only.
If the Transmission Control Module (TCM) cannot communicate with the Engine Control Module (ECM), the TCM will conclude that there is a malfunction in the CAN system, illuminate the MIL, and set a Diagnostic Trouble Code (DTC).
OBDII Code U0101 2010 Nissan Altima Sedan - Lost Communication with Transmission Control Module  - AutoCodes.com
U0101 2010 Nissan Altima Sedan Code - Lost Communication with Transmission Control Module

What are the Possible Causes of the DTC U0101 2010 Nissan Altima Sedan?

  • Faulty Transmission Control Module (TCM)
  • Transmission Control Module harness is open or shorted
  • Transmission Control Module circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC U0101 2010 Nissan Altima Sedan?

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 U0101 2010 Nissan Altima Sedan 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 U0101 2010 Nissan Altima Sedan code?

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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 U0101 2010 Nissan Altima Sedan Code

1. What does the OBDII code U0101 on my 2010 Nissan Altima Sedan mean?

The code U0101 indicates a communication problem between the engine control module (ECM) and the transmission control module (TCM).

2. What are the common symptoms of U0101 on a 2010 Nissan Altima Sedan?

Common symptoms of U0101 include transmission shifting issues, hesitation during acceleration, and the vehicle going into limp mode.

3. What are the possible causes of U0101 on a 2010 Nissan Altima Sedan?

Potential causes of U0101 include damaged wiring or connectors, a faulty TCM, ECM, or CAN bus communication system issues.

4. How can I diagnose the U0101 code on my 2010 Nissan Altima Sedan?

Diagnosing the U0101 code involves checking the wiring and connectors for damage, testing the TCM and ECM for functionality, and verifying the CAN bus communication system.

5. How can I repair the U0101 code on my 2010 Nissan Altima Sedan?

Repairing the U0101 code may involve repairing or replacing damaged wiring or connectors, replacing the faulty TCM or ECM, or addressing any issues with the CAN bus communication system.

6. Can I continue driving my 2010 Nissan Altima Sedan with the U0101 code?

It is not recommended to continue driving your vehicle with the U0101 code as it can lead to transmission issues and potential safety hazards.

7. How much does it cost to fix the U0101 code on a 2010 Nissan Altima Sedan?

The cost of fixing the U0101 code can vary depending on the specific cause of the issue, but it may range from a few hundred to over a thousand dollars.

8. Is the U0101 code a common problem in 2010 Nissan Altima Sedans?

The U0101 code is not uncommon in 2010 Nissan Altima Sedans, especially in vehicles that have higher mileage or have experienced electrical issues.

9. Can I reset the U0101 code on my 2010 Nissan Altima Sedan without fixing the underlying issue?

While you can clear the code with an OBDII scanner, it is essential to address the underlying problem to prevent it from reoccurring.

10. How long does it take to repair the U0101 code on a 2010 Nissan Altima Sedan?

The repair time for the U0101 code can vary depending on the exact cause of the issue, but it may take a few hours to a full day for diagnosis and repair.

Discuss the causes and fixes for U0101 2010 Nissan Altima Sedan OBDII Code

  • Changed the CVT tranny in my 2010 Altima. It worked fine drove for 300miles and than the torque seal gave out. Replaced it and now getting a code for U0101. I am a weekend warrior and have no clue or money to take it in. Too scared that it'll cost me more than the tranny to get this fixed.

    Any help with be appreciated...

  • The code means that the Engine Control Module (ECM) has lost communication with the Transmission Control Module (TCM). I recommend checking the transmission connectors, it's possible that one of the connectors it's not connected or not connected all the way in.

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