AutoCodes – Ford – U1901 Ford

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

Quick Answer

The yaw rate sensor, roll rate sensor, lateral accelerometer and longitudinal accelerometer are contained in one module called the stability control sensor cluster. Common causes include Faulty Stability Control Sensor Cluster, Stability Control Sensor Cluster harness is open or shorted, Stability Control Sensor Cluster 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: U1901 Ford indicates CAN Network No. 2 Communication Bus Fault - Receive Error.
Common causes: Common causes include Faulty Stability Control Sensor Cluster, Stability Control Sensor Cluster harness is open or shorted, Stability Control Sensor Cluster 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.

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Code Popularity 13,070

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code U1901 Ford Description

The yaw rate sensor, roll rate sensor, lateral accelerometer and longitudinal accelerometer are contained in one module called the stability control sensor cluster. The sensor cluster measures the vehicle acceleration, roll rate and yaw rate, then sends the signal through a secondary, dedicated controller area network (CAN2) bus to the ABS module. The ABS module compares the information from the sensor cluster to information it receives from other sensors (brake pedal input or steering wheel rotation sensor) to determine how valid the information is and to determine if a roll-over event is about to occur.
The ABS module provides power to the sensor cluster and ground. The sensor cluster and the ABS module communicate. An open circuit or a short to power or ground on any one of these 4 circuits will cause the ABS module to set a DTC. Also, if the sensor cluster is not mounted in the correct position, with the electrical connector facing the passenger seat, the ABS module will also set DTCs.

OBDII Code U1901 Ford - CAN Network No. 2 Communication Bus Fault - Receive Error - AutoCodes.com — U1901 Ford Code - CAN Network No. 2 Communication Bus Fault - Receive Error

What does this mean?

What are the Possible Causes of the DTC U1901 Ford?

Faulty Stability Control Sensor Cluster
Stability Control Sensor Cluster harness is open or shorted
Stability Control Sensor Cluster circuit poor electrical connection

How to Fix the DTC U1901 Ford?

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 U1901 Ford 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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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 Ford Code

1. What does the OBDII code U1901 mean on a Ford vehicle?

The code U1901 indicates a communication fault on the CAN Network No. 2, meaning one or more control modules are not receiving or sending data correctly.

2. What are the common symptoms of a U1901 code in a Ford?

Symptoms may include warning lights on the dashboard, intermittent power loss, failure of certain systems like ABS or traction control, or difficulty starting the vehicle.

3. What causes the U1901 code to appear?

Common causes include a faulty wiring connection, damaged CAN bus wires, a failing control module, or electrical interference from aftermarket accessories.

4. Can a low battery cause the U1901 code?

Yes, a weak or low battery can cause communication errors on the CAN bus, potentially triggering the U1901 code.

5. How do I diagnose the U1901 code on a Ford?

Start by visually inspecting the CAN bus wiring and connections for damage or corrosion, check battery voltage, and use a scan tool to test module communication.

6. Is it safe to drive with a U1901 code active?

Driving may still be possible, but the vehicle could experience erratic behavior or system failures, so itâ€™s best to address the issue promptly.

7. Can a blown fuse cause the U1901 code?

Yes, a blown fuse associated with the CAN bus system or a specific module can lead to a U1901 communication fault.

8. How can I fix the U1901 code on my Ford?

Repairs may involve replacing damaged wiring, reconnecting loose connections, repairing or replacing a faulty module, or reprogramming affected modules.

9. Can a U1901 code clear itself?

The code may clear temporarily if the issue is intermittent, but the underlying problem must be resolved to prevent it from returning.

10. Do I need a professional to fix the U1901 code?

While basic checks like inspecting wires and fuses can be done at home, diagnosing and repairing module or network issues often requires specialized tools and expertise.