Engine-Codes - Generic - U129E

U129E - Lost Communication With PCU

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

U129E Possible Causes

  • Faulty Keyless Access/TPMS Control Unit
  • Keyless Access/TPMS Control Unit harness is open or shorted
  • Keyless Access/TPMS Control Unit circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

How is the U129E 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 U129E code

Labor: 1.0

The cost to diagnose the U129E 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)

U129E Meaning

The Controller Area Network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (F-CAN_H and F-CAN_L). When the Powertrain Control Module (PCM) does not receive the signals from the Keyless Access/TPMS Control Unit via the F-CAN lines for a set time, the PCM detects a malfunction and stores a Diagnostic Trouble Code (DTC).

More Information

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