Engine-Codes - Generic - U12A3

U12A3 - Lost Communication With Particulate Matter Sensor

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

U12A3 Possible Causes

  • Faulty Particulate Matter Sensor
  • Particulate Matter Sensor harness is open or shorted
  • Particulate Matter Sensor circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How is the U12A3 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 U12A3 code

Labor: 1.0

The cost to diagnose the U12A3 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)

U12A3 Meaning

The Powertrain Control Module (PCM) does not receive a message from the Particulate Matter Sensor over the Datalink circuits.

More Information

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Information for specific makes

  • U12A3 CHRYSLER Lost Communication With Particulate Matter Sensor
  • U12A3 DODGE Lost Communication With Particulate Matter Sensor
  • U12A3 JEEP Lost Communication With Particulate Matter Sensor
  • U12A3 RAM Lost Communication With Particulate Matter Sensor

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