U1901 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 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.
Code U1901 Description
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.
What are the Possible Causes of the DTC U1901?
- 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?
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 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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Information for Specific Makes
- U1901 Buick — Lost Communication With Infotainment Multifunction Switch Module
- U1901 Cadillac — Lost Communication With Infotainment Multifunction Switch Module
- U1901 Chevrolet — Lost Communication With Infotainment Multifunction Switch Module
- U1901 Ford — CAN Network No. 2 Communication Bus Fault - Receive Error
- U1901 GMC — Lost Communication With Infotainment Multifunction Switch Module
- U1901 Lincoln — CAN Network No. 2 Communication Bus Fault - Receive Error
- U1901 Mercury — CAN Network No. 2 Communication Bus Fault - Receive Error
Frequently Asked Questions about U1901 Code
1. What are common symptoms of OBDII code U1901?
- Common symptoms include issues with the vehicle's communication systems, 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 OBDII code U1901 to appear?
- The code U1901 usually indicates a communication fault on the CAN Network No. 2, which can be caused by wiring issues, faulty control modules, damaged connectors, or software glitches.
3. How can I diagnose the cause of OBDII code U1901?
- Diagnosing U1901 requires using a professional diagnostic scan tool to access the network and check for communication faults, inspecting the wiring and connectors for damage, and testing the control modules for proper functioning.
4. Is it safe to drive with OBDII code U1901 present?
- It is not recommended to drive with the U1901 code present, as it can lead to potential safety hazards due to communication failures between critical vehicle systems.
5. Can I repair OBDII code U1901 myself?
- Repairing the U1901 code may require advanced diagnostic and electrical skills. It is recommended to seek help from a qualified mechanic or technician to properly diagnose and repair the communication bus fault.
6. How much does it cost to fix OBDII code U1901?
- The cost of fixing U1901 can vary depending on the root cause of the communication fault. It may range from a simple wiring repair to replacing faulty control modules, potentially costing a few hundred to a few thousand dollars.
7. Are there any common fixes for OBDII code U1901?
- Common fixes for U1901 may include repairing damaged wiring, replacing faulty control modules, updating software, resetting the system, or reprogramming the modules to restore communication on the CAN Network No. 2.
8. Can a low car battery cause OBDII code U1901?
- A low car battery can potentially cause communication issues leading to the U1901 code. It is important to ensure the battery is in good condition and properly charged to prevent network faults.
9. What should I do if OBDII code U1901 keeps coming back after being cleared?
- If the U1901 code keeps reappearing after being cleared, it indicates a persistent communication fault that requires further diagnosis and repair. It is advisable to consult a professional technician for a thorough inspection.
10. Is OBDII code U1901 related to emission control systems?
- OBDII code U1901 is not directly related to emission control systems but rather indicates a communication fault on the CAN Network No. 2, which can affect the overall performance and functionality of various vehicle systems.
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