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U1255 Diagnostic Trouble Code Discussion for May 2008

Class 2 Communication Malfunction

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Trouble Ticket Help Requests for DTC U1255
Help Request Posted
2003 Oldsmobile Alero GL 3.4L No Start VIN: 1G3NL52EX3
U1255: Class 2 Communication Malfunction. This problem has been very difficult to diagnose as it occurs very intermittently. Today it did it twice which was the first time in 4 days. When the problem occurs the green/white wire from the pcm to the fuel pump relay goes dead, no fuel pump. At first I th...
May 05, 2008
2002 Oldsmobile Alero GL 3.4L No Start, INTERMITENT VIN: 1G3NL52E12
U1255: Class 2 Communication Malfunction. vechile sits outside in sun for a period of time. the complaint is that it wont start and the door locks keep on unlocking and locking. when it stops the vechile will start. there are 5 codes due to loss of communication. plus in shop it will not start then tu...
May 14, 2008