[SOLVED] U0046 Code: How To Fix Vehicle Communication Bus ‘c’ Issue

The automobile fault code U0046 indicates a problem with the Control Module, which can cause the Engine Light to turn on. Diagnosis of this code is done through the vehicle’s symptoms and checking for other codes.

The cause could be a faulty Control Module, an open or shorted Control Module harness, or a poor electrical connection.

The repair is not too difficult, and it is important to visually inspect the wiring harness and connectors for any damage or corrosion. The repair time is estimated to be around 1.0.

To interpret the fault code, it is essential to check the possible causes listed above and look for any damaged components or connector pins.

Repair Importance Level10.0 (Out of 10)
Estimated Repair TimeApproximately 1.0 hour
Repair Difficulty Level10.0 (Out of 10)

If you notice the Engine Light ON or Service Engine Soon Warning Light, it could be due to the u0046 fault code.

Here are the symptoms to look out for:

  • The U0046 fault code in an automobile can cause several symptoms, including the engine light turning on or the service engine soon warning light appearing.
  • Other symptoms may include issues with the vehicle’s transmission, problems with the stability control system, and difficulty shifting gears.
  • Additionally, the vehicle may experience reduced power or acceleration, and the engine may stall or misfire.
  • It is important to address these symptoms promptly to prevent further damage to the vehicle and ensure safe driving conditions.

The automobile fault code u0046 can be caused by a range of issues, including faulty control modules and poor electrical connections.

  • The automobile fault code u0046 can be caused by various factors.
  • These include diagnosing the Diagnostic Trouble Code (DTC) through the vehicle symptom(s), checking for more codes, a faulty Control Module, an open or shorted Control Module harness, and poor electrical connection in the Control Module circuit.
  • All of these factors can contribute to the occurrence of the u0046 fault code in an automobile.

Below are some possible fixes for the automobile fault code u0046, including inspecting wiring harness and connectors for damage or corrosion.

  • To fix the automobile fault code u0046, first, check the possible causes listed above.
  • Then, visually inspect the related wiring harness and connectors.
  • Look for damaged components and check for broken, bent, pushed out, or corroded connector’s pins.
  • This fix will take an estimated repair time of 1.0 hour.

The automobile fault code U0046 can be diagnosed and fixed within an estimated repair time of 1.0 hour. The cost of repair is influenced by the repair time, which is commonly charged between $75 and $150 per hour by most auto repair shops. Therefore, the total cost of diagnosis and fixing the U0046 fault code will depend on the hourly rate charged by the repair shop and the estimated repair time required to fix the issue.

The U0046 code is related to the Vehicle Communication Bus ‘C’. It is a Controller Area Network (CAN) fault code that indicates a communication problem between different automotive devices. CAN bus is a vehicle bus standard designed to interconnect automotive devices without a host computer.

The CAN bus uses two dedicated wires for communication, CAN high and CAN low. The U0046 code sets when a supervised periodic message that includes the transmitter device availability has not been received. This code indicates that there is a problem with the communication between the devices connected to the Vehicle Communication Bus ‘C’.

What are the possible causes of the u0046 automobile fault code?

If you see the engine light on or the service engine soon warning light, it could be due to the u0046 automobile fault code. This code is diagnosed through the vehicle’s symptoms and may indicate a faulty control module or a poor electrical connection in the control module circuit. To fix this issue, you should visually inspect the wiring harness and connectors for any damage or corrosion. Additionally, check for broken, bent, or pushed out connector pins.

How can the faulty control module be fixed in case of the u0046 fault code?

If you’re experiencing the u0046 fault code, which is indicated by the engine light being on, it could be due to a faulty control module or poor electrical connection. To fix this issue, start by visually inspecting the wiring harness and connectors for any damage or corrosion. Check for broken, bent, or pushed out connector pins. It’s also important to diagnose any other potential codes that may be contributing to the issue.

What steps should be taken to visually inspect the related wiring harness and connectors in case of the u0046 fault code?

If you encounter the u0046 fault code, start by checking for more codes and a faulty control module. To fix the issue, visually inspect the related wiring harness and connectors for any damage or poor electrical connections. Look for broken, bent, pushed out, or corroded connector pins.

u0046 error fault code explained

If your engine light is on, it could be due to a faulty control module or poor electrical connection. Check for more codes and visually inspect the wiring harness and connectors for damage.

Look for broken, bent, pushed out, or corroded connector pins.

Scroll to Top