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Home/DTC Codes/Mitsubishi/Lancer/2011-2011 2.4L I4/U0100
U0100

Lost Communication with ECM/PCM

2011-2011 Mitsubishi Lancer 2.4L I4

Critical SeverityNetworkGeneric (SAE)

The 2011 Mitsubishi Lancer is equipped with a 2.4L inline-4 engine. Below you'll find detailed u0100 diagnostic code information including labor time estimates, cost ranges, and technician notes specific to this engine configuration.

Description

The diagnostic system cannot communicate with the Engine Control Module.

Symptoms

  • Multiple warning lights
  • Engine may not start
  • Many systems inoperative
  • Cannot read engine codes

Common Causes

  • PCM power or ground failure
  • CAN bus wiring issue
  • PCM failure
  • Fuse blown
  • Wiring harness damage

Diagnostic Steps

  1. Check PCM fuses
  2. Test PCM power and ground circuits
  3. Check CAN bus wiring to PCM
  4. Try communicating with other modules
  5. Inspect wiring harness

Repair Notes

Check fuses and power supply to PCM first. CAN bus issue is second most common.

Related Codes

P0600Serial Communication LinkU0001High Speed CAN Communication BusU0101Lost Communication with TCM

Other Network Codes

U0100 on Other Vehicles

Mitsubishi 3000GT

1996-1996 3.0L V6 Twin Turbo

Mitsubishi 3000GT

1997-1997 3.0L V6 Twin Turbo

Mitsubishi 3000GT

1998-1998 3.0L V6 Twin Turbo

Mitsubishi 3000GT

1999-1999 3.0L V6 Twin Turbo

Mitsubishi Colt JP

2002-2002 1.3L I4 4A90

Mitsubishi Colt JP

2002-2002 1.5L I4 4A91

Mitsubishi Colt JP

2003-2003 1.3L I4 4A90

Mitsubishi Colt JP

2003-2003 1.5L I4 4A91

Common Questions

What does code U0100 mean on a 2011-2011 Mitsubishi Lancer?

U0100 stands for "Lost Communication with ECM/PCM". The diagnostic system cannot communicate with the Engine Control Module.

What are the symptoms of U0100 on a Mitsubishi Lancer?

Common symptoms of U0100 include: Multiple warning lights, Engine may not start, Many systems inoperative, Cannot read engine codes.

What causes U0100 on a 2011-2011 Mitsubishi Lancer?

Common causes of U0100 include: PCM power or ground failure, CAN bus wiring issue, PCM failure, Fuse blown, Wiring harness damage.

Last updated: March 2026

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