DTC Troubleshooting: U0155 (107-3)

DTC U0155:  Lost Communication with Gauge Control Module

NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review General Troubleshooting Information.

1.Clear the DTC with the HDS.

2.Turn the ignition switch ON (II).

3.Check whether the DTC U0155 is indicated in the DTCs/Freeze Data in PGM FI Mode Menu with the HDS.

Is DTC U0155 indicated in the PGM FI system?


YES - Troubleshoot for DTC U0155 in the PGM-FI System.


NO - Go to 4.


4.Check whether the DTC U0155 is indicated in the DTCs/Freeze Data in A/T Mode Menu with the HDS.

Is DTC U0155 indicated?


YES - Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original  PCM.n


NO - Intermittent failure, the system is OK at this time.n