What are the common causes of P2B04?

A failing cylinder 5 fuel injector. An injection pulse driver fault on the cylinder 5 channel. Chafed cylinder 5 injector wiring. A fuel rail pressure drop at the cylinder 5 position.

Scan all modules and plot the cylinder 5 injection pulse against the others. Inspect the cylinder 5 injector harness for chafing or damage. Measure the cylinder 5 injector coil resistance. Verify fuel rail pressure at the cylinder 5 injector. Replace the cylinder 5 injector if the pulse stays off. Clear the code and retest.

P2B04

Cylinder 5 Injection Pulse Performance

System: Powertrain control (P code)
Lamp: Check Engine Light
Category: Powertrain - Hybrid Propulsion

What it means

P2B04 means Cylinder 5 Injection Pulse Performance.

Check these first

A failing cylinder 5 fuel injector
An injection pulse driver fault on the cylinder 5 channel
Chafed cylinder 5 injector wiring
A fuel rail pressure drop at the cylinder 5 position

What to do next

Scan all modules and plot the cylinder 5 injection pulse against the others
Inspect the cylinder 5 injector harness for chafing or damage
Measure the cylinder 5 injector coil resistance
Verify fuel rail pressure at the cylinder 5 injector
Replace the cylinder 5 injector if the pulse stays off
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.