U0155 LOST COMMUNICATION WITH CLUSTER/CCN
There is a communication problem between the cluster & the PCM. It may be as simple as a bad connection at the connectors behind the cluster or maybe as bad as a bad PCM. Start with simple things first. Does the CEL light when you turn the key on? After you clear the codes (if any) does the display say "DONE"? Test the CEL by leaving the gas cap loose or off & starting the engine & see if it throws a code.
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