Problem: The vehicle came into the shop for a
crank but does not start issue.
Details: The tech connected a scan tool and
pulled numerous DTCs (Diagnostic Trouble Codes) related to the
even-numbered cylinders on the left bank (see DTCs below). He
checked those cylinders for spark with a spark tester and
injection pulse with a noid light and found none. The tech also
noted that the fuse designated as the “EVEN INJ/COIL” fuse
kept blowing as soon as the engine was cranked.
P0264 Injector 2 Control circuit Low voltage
P0270 Injector 4 Control circuit Low voltage
P0276 Injector 6 Control circuit Low voltage
P0300 Random Misfire Detected
P0302 cylinder #2 Misfire Detected
P0304 cylinder #4 Misfire Detected
P0306 cylinder #6 Misfire Detected
The Tech-Assist consultant suggested disconnecting the harness
connectors to the injectors and coils on the left bank, then
begin plugging each connector in one at a time while cranking the
engine until the coil(s) or injector(s) that was causing the fuse
to blow was found.
The technician followed the instructions and found the coil on
cylinder #2 would blow the fuse.
Confirmed Repair: The tech replaced the #2
coil and it’s wiring pigtail and the Caddy is fixed!