AutoCodes - Ford - U0004 FORD

U0004 FORD Code - High Speed CAN Communication Bus (+) Low

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3
Table of contents

|U0004 FORD code possible causes

  • Diagnosis of this Diagnostic Trouble Code (DTC) is accomplished via the vehicle symptom(s)
  • Check for more codes
  • Faulty Control Module
  • Control Module harness is open or shorted
  • Control Module circuit poor electrical connection

|How do I fix the U0004 FORD code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|Cost of diagnosing the U0004 FORD code

Labor: 1.0

The cost of diagnosing the U0004 FORD code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are U0004 FORD code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|U0004 FORD code description

Multiplexing is a method of sending 2 or more signals simultaneously over a single circuit. Multiplexing allows 2 or more electronic modules (nodes) to communicate over a twisted wire pair [data (+) and data (-)] network. The information or messages that can be communicated on these wires consists of commands, status or data. Multiplexing reduces the weight of the vehicle by reducing the number of redundant components and electrical wiring. The vehicle has 4 module communication networks connected to the DLC, located under the instrument panel. The communication networks are: HEV High Speed Controller Area Network (HS-CAN), High Speed Controller Area Network (HS-CAN), Medium Speed Controller Area Network (MS-CAN) and Infotainment Controller Area Network (I-CAN). The Diagnostic Trouble Code (DTC) U0004 sets when a High Speed Controller Area Network (HS-CAN) fault was present at a point in time. The fault is not currently present since the module is communicating with the scan tool.
OBDII Code U0004 Ford - High Speed CAN Communication Bus (+) Low -

|Need more information with the U0004 FORD code?

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|Need help with a U0004 FORD code?

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|U0004 FORD code comments

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Repair Importance Level: 3
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