Engine-Codes - Ford - U1A00 FORD

U1A00 FORD Code - Private Communication Network Internal Electronic Failure

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

|U1A00 FORD code possible causes

  • Faulty Restraints Control Module (RCM)
  • Restraints Control Module harness is open or shorted
  • Restraints Control Module circuit poor electrical connection
  • Faulty Anti-Lock Brake System (ABS) Module

|How is the U1A00 FORD code repair?

Start by checking 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.

|U1A00 FORD code tech notes

DTC U1A00:49 (Private Communication Network: Internal Electronic Failure) - this Diagnostic Trouble Code (DTC) sets in continuous memory and on-demand when there is a communication issue between the ABS module and the RCM.
DTC U1A00:87 (Private Communication Network: Missing Message) - this DTC sets in continuous memory and on-demand when expected messages such as yaw rate sensor, lateral accelerometer, and longitudinal accelerometer missing for more than 5 seconds.
DTC U1A00:88 (Private Communication Network: Bus Off) - this DTC sets in continuous memory and on-demand when the communication bus is down between the ABS module and the RCM and they are unable to communicate.

|What is the cost to diagnose the U1A00 FORD code

Labor: 1.0

The cost to diagnose the U1A00 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 U1A00 FORD code possible symptoms?

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

|What is U1A00 FORD code meaning?

The yaw rate sensor, lateral and longitudinal accelerometers are contained in the Restraints Control Module (RCM). The RCM measures vehicle yaw rate, roll rate, lateral and longitudinal acceleration and then sends the information to the Anti-Lock Brake System (ABS) Module along with a dedicated Controller Area Network (CAN). This dedicated CAN is used only for communication between the RCM and the ABS Module. The information sent to the ABS module is used to help determine if the AdvanceTrac® system needs to be activated. This Diagnostic Trouble Code (DTC) sets in continuous memory and on-demand when there is a communication issue between the ABS module and the RCM.

|Need more information with the U1A00 FORD code?

Need more information on how to fix the U1A00 FORD code?
Get Access to Factory Service Manuals

|Need help with a U1A00 FORD code?

Get the U1a00 Ford code diagnosed by a professional: Find a repair shop in your area