Join Now
International Automotive Technicians Network

U1255 Diagnostic Trouble Code Discussion for April 2007

Class 2 Communication Malfunction


Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC U1255
Help Request Posted
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8X
U1255: Class 2 comm. fault history. Very strange no start problem. No pwr to fuel pump relay KOEO. Fuel pump works with prime connector. Replaced ign. switch (common problem). Verified correct install of switch, turned both switch and key to ACC. No comm. w/ VCM in run position, other modules co...
April 10, 2007
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8X
U1255: Class 2 comm. fault history. Very strange no start problem. No pwr to fuel pump relay KOEO. Fuel pump works with prime connector. Replaced ign. switch (common problem). Verified correct install of switch, turned both switch and key to ACC. No comm. w/ VCM in run position, other modules co...
April 26, 2007
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8X
U1255: Class 2 comm. fault history. Very strange no start problem. No pwr to fuel pump relay KOEO. Fuel pump works with prime connector. Replaced ign. switch (common problem). Verified correct install of switch, turned both switch and key to ACC. No comm. w/ VCM in run position, other modules co...
April 10, 2007
1999 Chevrolet Blazer 4.3L No Start VIN: 1GNDT13W8X
U1255: Class 2 comm. fault history. Very strange no start problem. No pwr to fuel pump relay KOEO. Fuel pump works with prime connector. Replaced ign. switch (common problem). Verified correct install of switch, turned both switch and key to ACC. No comm. w/ VCM in run position, other modules co...
April 26, 2007