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Home/DTC Codes/BMW/320i/2012-2015 2.0L I4 Turbo N20/U0401
U0401

Invalid Data Received from ECM/PCM

2012-2015 BMW 320i 2.0L I4 Turbo N20

Moderate SeverityNetworkGeneric (SAE)

Description

The data received from the PCM is invalid or corrupted.

Symptoms

  • Various warning lights
  • Erratic system behavior

Common Causes

  • PCM software issue
  • CAN bus noise
  • PCM failure
  • Wiring interference

Diagnostic Steps

  1. Update PCM software
  2. Check for TSBs
  3. Test CAN bus signal quality
  4. Check for electromagnetic interference

Repair Notes

Reprogram PCM. Check CAN bus.

Related Codes

U0100Lost Communication with ECM/PCM

Other Network Codes

U0401 on Other Vehicles

BMW 3 Series F30

2012-2018 2.0L I4 Turbo N20

BMW 3 Series F30

2012-2018 3.0L I6 Turbo N55

BMW 3 Series G20

2019-2024 2.0L I4 Turbo B48

BMW 318i E36

1992-1998 1.8L I4

BMW 318i E36

1996-1999 1.9L I4 M44

BMW 318is E36

1992-1996 1.8L I4

BMW 318ti E36

1995-1999 1.9L I4

BMW 318ti E36

1996-1999 1.9L I4 M44

Common Questions

What does code U0401 mean on a 2012-2015 BMW 320i?

U0401 stands for "Invalid Data Received from ECM/PCM". The data received from the PCM is invalid or corrupted.

What are the symptoms of U0401 on a BMW 320i?

Common symptoms of U0401 include: Various warning lights, Erratic system behavior.

What causes U0401 on a 2012-2015 BMW 320i?

Common causes of U0401 include: PCM software issue, CAN bus noise, PCM failure, Wiring interference.

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