Vehicle: 2011 Ford F350 Super
Duty, 2WD, 6.7L Turbo Diesel, Automatic Transmission
Problem: The vehicle came into the shop
running rough and the MIL was on.
Details: The technician connected a scan
tool and retrieved the following DTCs: P0201 – Injector
Circuit/Open – Cylinder 1 / P0202 – Injector Circuit/Open -
Cylinder 2 / P1201 – Cylinder 1 Injector Circuit Open/Shorted /
P1202 – Cylinder 2 Injector Circuit Open/Shorted. Based on those
diagnostic trouble codes, the tech performed a resistance test on
The best way to test the entire circuit from the PCM to the
injectors, was to take the readings from the PCM connector C1232E
through the injectors (see image). The resistance should be
between 150K to 210K ohms.
Confirmed Repair: The injector resistance
test revealed that the resistance in the #1 and #2 injector
circuits was fluctuating between OL and 160K Ohms. The other
injectors were steady at 170K Ohms. The technician replaced the
#1 and #2 injectors. On the test drive, the engine ran smooth and
the DTCs did not return.