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Engine-Codes - Generic - U1884

U1884 - Hybrid Control Module Lost Communication With Passenger Door Module

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

U1884 Possible Causes

What does this mean?
  • Faulty Passenger Door Module (PDM)
  • Passenger Door Module harness is open or shorted
  • Passenger Door Module circuit poor electrical connection
  • Faulty Hybrid Control Module (HCM)

How is the U1884 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.

What is the cost to diagnose the U1884 code

Labor: 1.0

The cost to diagnose the U1884 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.
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Possible Symptoms

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

U1884 Meaning

Modules connected to the class 2 and high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules. The Diagnostic Trouble Code (DTC) is reported on a class 2 link to the scan tool by Powertrain Control Module (PCM) even if they may be set by different modules. The DTC will set when a node alive message has not been received from an identified module within the last 5 seconds after establishing class 2 serial data communication, or a supervised high-speed GMLAN message has not been received.

More Information

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Information for specific makes

  • U1884 BUICK Hybrid Control Module Lost Communication With Passenger Door Module
  • U1884 CADILLAC Hybrid Control Module Lost Communication With Passenger Door Module
  • U1884 CHEVROLET Hybrid Control Module Lost Communication With Passenger Door Module
  • U1884 GMC Hybrid Control Module Lost Communication With Passenger Door Module

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