P2B19 flags injector 5: its learned zero-fuel offset exceeds the calibrated limit. Ford's diesel OBD summary groups the code with the other odd numbers from P2B11 to P2B1F under the Zero Fuel Calibration monitor, which it files under fuel system feedback control. One distinct trigger is altitude: special service message 53340 covers 2020–2025 F-Super Duty 6.7 L trucks that store these codes when driven above 762 m (2,500 ft). The first step is the service function that clears the minimum fuel mass adaptions of all cylinders with Ford's FDRS tool; Ford told dealers a permanent fix was planned for the second quarter of 2025. CARB counts a fuel feedback loop that has used up its authority as a fault under (f)(4.2.4)(A)(iii).
Medium severity. Can I keep driving?If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
Cylinder 5 is numbered according to the manufacturer: check your engine's manual before working on it.
Symptoms
- Check engine light after mountain or high-plateau driving
- Possibly slightly rough idle
Most likely causes
- Learned values skewed by driving above about 760 m (Ford SSM 53340)
- Injector 5 with changed opening behaviour
- PCM software without the later calibration fix
What to check, in order
Start with the simplest. You can tick off each step.
Good to know
- Repair difficulty: medium
- It affects emissions.
What each character of P2B19 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- B: Subsystem depends on the code range
- 19: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2B19?
If the car is running normally, drive in moderation to a repair shop. If it loses power or another warning appears, do not continue.
What causes code P2B19?
The most common causes are: learned values skewed by driving above about 760 m (Ford SSM 53340); injector 5 with changed opening behaviour; pCM software without the later calibration fix.
Related codes
- P2B18Cylinder 5 Injection Pulse Offset Not Learned
- P2B17Cylinder 4 Injection Pulse Offset Exceeded Learning Limit
- P2B1BCylinder 6 Injection Pulse Offset Exceeded Learning Limit
- P0275Cylinder 5 Contribution/Balance
- P02D4Cylinder 5 Fuel Injector A Offset Learning At Min Limit
- P02D5Cylinder 5 Fuel Injector A Offset Learning At Max Limit
Sources
- fordservicecontent.com: obd summary diesel 2023
- static.nhtsa.gov: MC 11013558 0001
- law.cornell.edu: 13 CCR 1968.2
Values and procedures vary by manufacturer. If it affects brakes, steering, fuel or high voltage, see a professional. Updated: 2026-11-04. How we build these pages.