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2011-2016 F-Super Duty – 6.7L Diesel – Fuel Knock Noise At Idle With Diagnostic Trouble Codes (DTCs) P0263, P0266, P0269, P0272, P0275, P0278, P0281, and/or P0284
Some F-Super Duty vehicles with 6.7L diesel engines can exhibit a fuel knock type noise at idle with one or more cylinder contribution/balance DTCs P0263, P0266, P0269, P0272, P0275, P0278, P0281 and/or P0284.
To resolve this issue please use the following procedure:
- Make sure ECT1 and EOT are above 176°F (80°C).
- 2) Using the IDS or equivalent service tool, run the Manual Injector Balance Test/Enhanced Power Balance Test under Toolbox, Powertrain, Power Balance.
If the noise is gone after running the test, then clear the High Pressure Side Min. Fuel Mass Adaptation tables for All Cylinders, and the Crankshaft Position Sensor under Toolbox, Powertrain, Service Functions, Reset, Clear Specified Function.
Release the vehicle back to the customer.
If the noise does not improve, follow Pin Point Test (PPT) M in the online PC/ED.
