Powertrain, generic (extended)

P2B1D Cylinder 7 Injection Pulse Offset Exceeded Learning Limit

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modeNo

P2B1D reports that the correction learned for injector 7 during Ford's zero-fuel calibration has gone beyond its limit; cylinder 7 exists only on the 6.7 L V8. Ford's TSB 25-2412 for 2023–2025 F-Super Duty trucks calls the warning lamp in many such cases incorrect: learned values skewed by operation above 762 m, sometimes with a slightly uneven idle. The repair is a calibration update for PCM and TCM, followed by resetting the minimum fuel mass adaptions. Ford's 2023 summary also shows the neighbouring fuel balancing control, which reports P0281 for cylinder 7 once more than 90 % of its permitted correction is used; both learns act on the same injector, so a balance code next to P2B1D points more towards real injector wear than towards a software issue.

Likely causes

Calibration learning wrong values at altitude (Ford TSB 25-2412)

Injector 7 worn, often with balance code P0281 as well

Interference on the crank or cam speed signal

Symptoms

Check engine light, sometimes without a real fault
Slightly uneven idle

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 7engine control module

References: static.nhtsa.gov, fordservicecontent.com.