Engine-Codes - Generic - U18A2

U18A2 - Lost Communication With Fuel Pump Driver Control Module

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

U18A2 Possible Causes

  • Faulty Fuel Pump Driver Control Module
  • Fuel Pump Driver Control Module harness is open or shorted
  • Fuel Pump Driver Control Module circuit poor electrical connection

How is the U18A2 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 U18A2 code

Labor: 1.0

The cost to diagnose the U18A2 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)

U18A2 Meaning

Devices connected to the serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the devices. The devices have prerecorded information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are supervised and also, some periodic messages are used by the receiver device as an availability indication of the transmitter device. Each message contains the identification number of the transmitter device. The Diagnostic Trouble Code (DTC) will set a supervised periodic message that includes the transmitter device availability that has not been received.

More Information

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Information for specific makes

  • U18A2 BUICK Lost Communication With Fuel Pump Driver Control Module
  • U18A2 CADILLAC Lost Communication With Fuel Pump Driver Control Module
  • U18A2 CHEVROLET Lost Communication With Fuel Pump Driver Control Module
  • U18A2 GMC Lost Communication With Fuel Pump Driver Control Module

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