AutoCodes - Generic - U1842

U1842 Code - Lost Communication With ECM/PCM

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

|U1842 code possible causes

  • Faulty Engine Control Module (ECM)/Powertrain Control Module (PCM)
  • Engine Control Module /Powertrain Control Module harness is open or shorted
  • Engine Control Module /Powertrain Control Module circuit poor electrical connection

|How do I fix the U1842 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 U1842 code

Labor: 1.0

The cost of diagnosing the U1842 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 U1842 code possible symptoms?

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

|U1842 code description

The system voltage is between 9-16 volts. The vehicle power mode master indicates that the need for serial data communications. The Diagnostic Trouble Code (DTC) will set when a supervised periodic message that includes the transmitter device availability has not been received.
OBDII Code U1842 - Lost Communication With ECM/PCM -

|Need more information with the U1842 code?

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|U1842 code information for specific makes

|Need help with a U1842 code?

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|U1842 code comments

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Repair Importance Level: 3
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