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U1A00 Code - Private Communication Network Internal Electronic Failure

- Code Popularity: 1,516 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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By AutoCodes.com - Updated Jun 10, 2020
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|U1A00 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 do I fix code U1A00 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.

|U1A00 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.

|Cost of diagnosing U1A00 code

Labor: 1.0

The cost of diagnosing the U1A00 code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are U1A00 code possible symptoms?

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

|U1A00 code description

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.

OBDII Code U1a00 - Private Communication Network Internal Electronic Failure - AutoCodes.com
U1A00 Code - Private Communication Network Internal Electronic Failure

|Need more information with the U1A00 code?

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|Information for specific makes

  • U1A00 FORD Private Communication Network Internal Electronic Failure
  • U1A00 INFINITI Telematics Accessory Power Circuit No Connection
  • U1A00 LINCOLN Private Communication Network Internal Electronic Failure
  • U1A00 MERCURY Private Communication Network Internal Electronic Failure
  • U1A00 NISSAN Telematics Accessory Power Circuit No Connection

|Need help with a U1A00 code?

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

|U1A00 code comments

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