For Shop Owners

U0155 HONDA - FCAN Malfunction (Gauge Control Module-ECM/PCM)

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Tech notes

For the 2003–2012 Honda Accord, 2003–2011 Honda Civic, 2010–2012 Honda Crosstour, 2007–2011 CR-V, 2009–2012 Fit, and 2003–2012 Pilot, before you start troubleshooting, try resetting the battery; that often does the trick. Just disconnect the negative cable for 5 seconds, and reconnect it. If the DTC doesn’t reset, you’re done. If it does, then continue with normal troubleshooting.
Keep in mind, some systems (like audio and navigation with volatile memory) will lose all stored data when you disconnect the battery. So make sure you’ve got the anti-theft codes and write down the audio presets before doing that.
What does this mean?

When is the code detected?

The U0155 code is set when the Powertrain Control Module (PCM) does not receive any signals via the F-CAN lines for at least 1 second.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

U0155 HONDA Description

The controller area network (CAN) transmits/receives pulsing signals to/from the control modules simultaneously by using two signal lines (CANH and CANL). When the Powertrain Control Module (PCM) does not receive the signals from the gauge control module via the F-CAN lines for a set time, the PCM detects a malfunction and stores a DTC.
OBDII Code U0155 Honda - FCAN Malfunction (Gauge Control Module-ECM/PCM) -

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U0155 HONDA Comments

Help us improve Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the U0155 Honda code? Have you replaced any parts?
Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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