P2B14 tells that no offset has yet been learned for injector 3. No carmaker publishes this code for a specific engine, and the GM and Ford tables checked do not contain it. A GM patent on fast learning of diesel injector corrections shows why such a learn can take long: corrections are kept per injector and per rail pressure level, so a six-cylinder with four pressure levels needs 24 learned cells, each filled only during suitable fuel cut-off phases. The patent's answer is to extrapolate from one measured pressure to the others. Until the cells for cylinder 3 are complete, small pilot injections on that cylinder run without their individual correction. Under CARB (f)(4.2.4)(A)(i) such feedback must start within a set time; P2B15 is the out-of-limit partner.
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 3 is numbered according to the manufacturer: check your engine's manual before working on it.
Symptoms
- Warning lamp, driving behaviour mostly unchanged
- Slightly uneven idle in some cases
Most likely causes
- Learn not yet completed for all rail pressure levels of injector 3
- Injector 3 or control unit recently replaced without completing the learn
- Rail pressure not holding steady enough during the test injection
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 P2B14 means
- P: Powertrain: engine and transmission
- 2: Generic code: same on every make
- B: Subsystem depends on the code range
- 14: Specific fault in that system
Frequently asked questions
Can I keep driving with code P2B14?
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 P2B14?
The most common causes are: learn not yet completed for all rail pressure levels of injector 3; injector 3 or control unit recently replaced without completing the learn; rail pressure not holding steady enough during the test injection.
Related codes
- P2B15Cylinder 3 Injection Pulse Offset Exceeded Learning Limit
- P2B12Cylinder 2 Injection Pulse Offset Not Learned
- P2B16Cylinder 4 Injection Pulse Offset Not Learned
- P02D0Cylinder 3 Fuel Injector A Offset Learning At Min Limit
- P02D1Cylinder 3 Fuel Injector A Offset Learning At Max Limit
- P0269Cylinder 3 Contribution/Balance
Sources
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.