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Engine-Codes – Lincoln – U1901 Lincoln

U1901 Lincoln Code - CAN Network No. 2 Communication Bus Fault - Receive Error

Quick Answer

The U1901 diagnostic trouble code for Lincoln vehicles indicates a fault in the CAN Network No. Common causes include Faulty Communication Module: A defective communication module within the CAN network can trigger this code, Wiring or Connector Issues: Damaged wiring, connectors, or terminals in the communication bus can disrupt communication, Software Glitches: Software bugs or errors in the control modules handling the CAN network communication. 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
U1901 Lincoln indicates CAN Network No. 2 Communication Bus Fault - Receive Error.
Common causes
Common causes include Faulty Communication Module: A defective communication module within the CAN network can trigger this code, Wiring or Connector Issues: Damaged wiring, connectors, or terminals in the communication bus can disrupt communication, Software Glitches: Software bugs or errors in the control modules handling the CAN network communication.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code U1901 Lincoln Description

The U1901 diagnostic trouble code for Lincoln vehicles indicates a fault in the CAN Network No. 2 Communication Bus, specifically related to a receive error. The Controller Area Network (CAN) is a communication protocol used in modern vehicles to facilitate communication between various control modules and systems. In this case, the CAN Network No. 2 is experiencing issues with receiving data, which can disrupt the flow of information between different components of the vehicle.

OBDII Code U1901 Lincoln - CAN Network No. 2 Communication Bus Fault - Receive Error
U1901 Lincoln Code - CAN Network No. 2 Communication Bus Fault - Receive Error

Common Causes of U1901 Lincoln

  1. Faulty Communication Module: A defective communication module within the CAN network can trigger this code.
  2. Wiring or Connector Issues: Damaged wiring, connectors, or terminals in the communication bus can disrupt communication.
  3. Software Glitches: Software bugs or errors in the control modules handling the CAN network communication.
  4. Electrical Interference: External factors like electromagnetic interference can interfere with the CAN network signals.
  5. Control Module Malfunction: A malfunctioning control module responsible for managing the CAN network communication.

Symptoms of U1901 Lincoln

  1. Check Engine Light: The most obvious symptom of a U1901 code is the illumination of the check engine light on the dashboard.
  2. Erratic Behavior: The vehicle may exhibit erratic behavior, such as stalling, rough idling, or inconsistent performance.
  3. Transmission Issues: Transmission shifting problems, hesitation, or harsh shifting may occur due to communication errors.
  4. Electrical Malfunctions: Various electrical components or systems may malfunction, such as the airbag system, ABS, or traction control.

How to Fix U1901 Lincoln

  1. Diagnose the Issue: Use a professional OBD-II scanner to retrieve the trouble codes and perform a thorough diagnosis of the CAN network.
  2. Inspect Wiring and Connectors: Check for any damaged wiring, loose connectors, or corroded terminals in the communication bus.
  3. Test Communication Modules: Verify the functionality of the communication modules involved in the CAN network.
  4. Address Software Issues: Update or reflash the control modules with the latest software to resolve any glitches.
  5. Clear Codes and Test: After repairs are completed, clear the trouble codes, and test the vehicle to ensure the issue has been resolved.

Cost to Fix U1901 Lincoln

The cost of repairing a U1901 fault in the CAN Network No. 2 Communication Bus on a Lincoln vehicle can vary depending on the underlying cause of the issue and the extent of repairs needed. On average, the repair costs for this type of issue range from $200 to $600, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Labor rates typically range from $80 to $150 per hour, but rates may be higher at dealerships or in metropolitan areas. It's recommended to obtain quotes from local auto repair shops for a more accurate estimate.

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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 U1901 Lincoln Code

1. What are the common symptoms of the U1901 OBDII code in a Lincoln vehicle?

The common symptoms of the U1901 code include issues with the vehicle's communication system, such as intermittent or complete loss of communication with certain modules, warning lights on the dashboard, and potential drivability issues.

2. What can cause the U1901 OBDII code in a Lincoln vehicle?

The U1901 code in a Lincoln vehicle is typically caused by faults in the CAN network communication system, such as wiring issues, faulty modules, loose connections, or damaged communication bus components.

3. How can I diagnose the U1901 code in my Lincoln vehicle?

Diagnosing the U1901 code involves using a diagnostic scanner to retrieve the trouble codes, inspecting the CAN network connections for any visible damage, checking the communication modules for faults, and performing continuity and resistance tests on the wiring.

4. Can a DIY enthusiast repair the U1901 OBDII code in a Lincoln vehicle?

While it's possible for experienced DIY enthusiasts to address the U1901 code, due to the complexity of the CAN network system, it is recommended to seek professional help for an accurate diagnosis and proper repair.

5. Is it safe to continue driving with the U1901 OBDII code present in a Lincoln vehicle?

It is not recommended to continue driving with the U1901 code present, as it can lead to further communication issues within the vehicle's systems, potentially affecting safety and drivability.

6. How much does it typically cost to repair the U1901 OBDII code in a Lincoln vehicle?

The cost of repairing the U1901 code in a Lincoln vehicle can vary depending on the underlying cause of the issue, the extent of the repairs needed, and labor costs. It's advisable to get multiple quotes from reputable repair shops.

7. Are there any preventive measures to avoid the U1901 OBDII code in a Lincoln vehicle?

To help prevent the U1901 code from occurring, regular maintenance of the vehicle's communication systems, checking for loose connections or damaged wiring, and addressing any warning signs promptly can be beneficial.

8. Can a software update resolve the U1901 OBDII code in a Lincoln vehicle?

In some cases, a software update provided by the manufacturer may address communication issues related to the U1901 code. It's recommended to consult with a dealership or qualified technician for guidance on software updates.

9. Will resetting the OBDII code clear the U1901 fault in a Lincoln vehicle?

Simply clearing the code without addressing the underlying cause may temporarily remove the warning light, but the issue causing the U1901 code will persist and likely trigger the code again. It's important to diagnose and repair the root cause.

10. How long does it take to repair the U1901 OBDII code in a Lincoln vehicle?

The repair time for the U1901 code can vary based on the complexity of the diagnosis and the extent of the repairs required. It's advisable to consult with a professional technician for an accurate estimate of the repair duration.

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