Faulty fuel injector on cylinder 3, such as a clogged nozzle or internal leak; Wiring or connector issues at the cylinder 3 injector, including corrosion or damaged pins; Low fuel pressure or volume from a weak fuel pump or restricted filter; Carbon buildup on intake valves or injector tips affecting spray pattern; Engine mechanical problems like low compression or valve sealing issues on cylinder 3; ECM software calibration issues or internal fault preventing learning; Contaminated fuel or incorrect fuel type affecting injector performance

DTC codes / P2Bxx · Hybrid propulsion / P2B14

P2B14Cylinder 3 Injection Pulse Offset Not Learned

Q: What does code P2B14 mean?

Cylinder 3 Injection Pulse Offset Not Learned. P2B14 indicates that the engine control module (ECM) has not successfully learned the injection pulse offset for cylinder 3, which is a calibration value used to fine-tune fuel delivery. The ECM detects this when the learning process fails to complete, often due to a mechanical or electrical issue preventing the expected feedback signal.

P2B14 indicates that the engine control module (ECM) has not successfully learned the injection pulse offset for cylinder 3, which is a calibration value used to fine-tune fuel delivery. The ECM detects this when the learning process fails to complete, often due to a mechanical or electrical issue preventing the expected feedback signal.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

Symptoms you may notice

Illumination of the check engine light, often with no other noticeable symptoms
Rough idle or misfire, particularly when the engine is cold
Slight hesitation or stumble during acceleration
Decreased fuel economy due to incorrect fuel delivery
In rare cases, a noticeable loss of power under load

Common causes, most likely first

Faulty fuel injector on cylinder 3, such as a clogged nozzle or internal leak
Wiring or connector issues at the cylinder 3 injector, including corrosion or damaged pins
Low fuel pressure or volume from a weak fuel pump or restricted filter
Carbon buildup on intake valves or injector tips affecting spray pattern
Engine mechanical problems like low compression or valve sealing issues on cylinder 3
ECM software calibration issues or internal fault preventing learning
Contaminated fuel or incorrect fuel type affecting injector performance

How to diagnose and fix it

Inspect the cylinder 3 injector connector and wiring for damage, corrosion, or loose pins, and repair as needed
Check fuel pressure and volume against the manufacturer's specifications to rule out a weak pump or clogged filter
Perform a cylinder balance test or injector cut-off test to compare cylinder 3 contribution with others
Remove and inspect the cylinder 3 injector for clogging or damage, and test its spray pattern and resistance
Clean or replace the cylinder 3 injector if it fails inspection or flow testing
Check for carbon buildup on intake valves and perform a decarbonization service if necessary
Verify compression on cylinder 3 to rule out mechanical issues, and repair as required
Relearn the injection pulse offset using a scan tool after repairs, and clear the code

Before you replace the cylinder 3 injector

A dirty or failing mass airflow sensor can skew fuel trim and prevent the ECM from learning the injection pulse offset, so check its readings before condemning the injector.
The code can set intermittently due to a loose ground connection at the engine block, which affects injector driver operation and learning.
After any injector replacement, the ECM must be commanded to relearn the offset; simply clearing the code will not complete the learning process.
Exhaust leaks upstream of the oxygen sensor can introduce false air and disrupt fuel control, leading to a failure to learn the offset.
On some vehicles, a weak battery or charging system issue can cause the ECM to abort the learning procedure, so verify battery voltage and charging system health.

Can I keep driving with P2B14?

You can generally continue driving with this code, but avoid heavy acceleration or towing until it is diagnosed, as prolonged driving with an uncorrected offset may lead to poor fuel economy or catalytic converter damage.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.