Engine-Codes - Mercury - U1021 MERCURY

U1021 MERCURY - Lost Communication With Anti-Lock Brake System Control Module

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

U1021 MERCURY Possible Causes

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

How is the U1021 MERCURY 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 U1021 MERCURY code

Labor: 1.0

The cost to diagnose the U1021 MERCURY 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)

U1021 MERCURY Meaning

The Diagnostic Trouble Code (DTC) sets in the Powertrain Control Module (PCM) if data messages received from the Anti-Lock Brake System (ABS) Control Module over the HS-CAN2 is missing.

More Information

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