Powertrain, generic (extended)

P2B11 Cylinder 1 Injection Pulse Offset Exceeded Learning Limit

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modeNo

P2B11 says the learned small-quantity correction for injector 1 has drifted beyond what the engine control may apply. Ford documents the code for its 3.0 L and 6.7 L Power Stroke diesels under Zero Fuel Calibration: the PCM fires a tiny test injection, compares the energising time that produced a measurable effect with the target stored for that injector and sets the code when the result is at least 156 µs too short or 254 µs too long. Ford TSB 18-2015 for the 2017 F-Super Duty 6.7 L ties P2B11 and its siblings to a fuel knock at idle caused by wrongly learned injector timing; the fix was resetting the high-pressure side, the minimum fuel mass adaption and the crank sensor learn, then reprogramming the PCM. P2B10 is the not-learned state of the same injector.

Likely causes

Incorrectly learned injector values in the PCM (Ford TSB 18-2015, reset and reprogramming)
Injector 1 worn or coked so its opening behaviour has really shifted
Disturbed crankshaft speed signal falsifying the learn result

Symptoms

  • Check engine light
  • Diesel knock at idle, sometimes together with balance code P0263

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€80–2,500
Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel injector cylinder 1engine control module

Related codes

P2B10P2B13P0263P02CCP02CDP02EE

References: fordservicecontent.com, static.nhtsa.gov, law.cornell.edu.