Error code

OBD2 U0155

OBD2U0155
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Lost Communication With Instrument Panel Cluster (IPC) Control Module.

Severity

moderateCan drive, but may experience issues with transmission and throttle control if communication is critical.

Summary

U0155 indicates lost communication between the Powertrain Control Module (PCM) and the Instrument Panel Cluster (IPC) control module on the CAN bus system.

Symptoms

  • Check engine light is on
  • Instrument cluster may not display correct information

Common Causes

  • Open circuit in the CAN bus positive or negative circuit
  • Short circuit in either or both CAN bus circuits
  • Failed or failing control modules other than the PCM
  • PCM failure (rare)

Diagnosis

  1. Check for open or short circuits in the CAN bus system
  2. Inspect other control modules for failures
  3. Consider reprogramming the PCM and instrument cluster

Fixes

  • Repair or replace faulty wiring or connectors in the CAN bus system
  • Replace a failed control module if identified

FAQ

Can I drive with U0155?

You can drive, but it may affect transmission and throttle control depending on the severity of the communication loss.

How do I fix U0155?

Fixing involves repairing or replacing faulty wiring/connectors in the CAN bus system or replacing a failed control module if identified.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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