Faulty fuel injector on cylinder six with a degraded internal coil or stuck pintle; Damaged or corroded electrical connector at the cylinder six injector; Chafed or open wiring in the injector harness between the PCM and the injector; Failed injector driver inside the powertrain control module (PCM); Low fuel pressure or restricted fuel delivery affecting that cylinder's injector performance; Contamination or debris in the fuel rail partially clogging the cylinder six injector

DTC codes / P2Bxx · Hybrid propulsion / P2B05

P2B05Cylinder 6 Injection Pulse Performance

Q: What does code P2B05 mean?

Cylinder 6 Injection Pulse Performance. P2B05 indicates that the powertrain control module has detected an abnormal injection pulse performance specifically for cylinder number six, meaning the electrical command sent to that cylinder's fuel injector did not produce the expected response in terms of timing, duration, or current draw. The computer monitors the injector driver circuit and compares commanded pulse width against feedback from the circuit, and it sets this code when the actual pulse deviates from the expected profile beyond a calibrated threshold.

P2B05 indicates that the powertrain control module has detected an abnormal injection pulse performance specifically for cylinder number six, meaning the electrical command sent to that cylinder's fuel injector did not produce the expected response in terms of timing, duration, or current draw. The computer monitors the injector driver circuit and compares commanded pulse width against feedback from the circuit, and it sets this code when the actual pulse deviates from the expected profile beyond a calibrated threshold.

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
A noticeable misfire or rough idle that may be intermittent
Reduced engine power or hesitation during acceleration
Shaking or vibration felt through the steering wheel or seat
A slight decrease in fuel economy over time
In some cases, a rich or lean exhaust smell depending on whether the injector is stuck open or closed

Common causes, most likely first

Faulty fuel injector on cylinder six with a degraded internal coil or stuck pintle
Damaged or corroded electrical connector at the cylinder six injector
Chafed or open wiring in the injector harness between the PCM and the injector
Failed injector driver inside the powertrain control module (PCM)
Low fuel pressure or restricted fuel delivery affecting that cylinder's injector performance
Contamination or debris in the fuel rail partially clogging the cylinder six injector

How to diagnose and fix it

Perform a visual inspection of the cylinder six injector connector and harness for corrosion, chafing, or loose pins
Measure the resistance of the cylinder six injector with a multimeter and compare it to the manufacturer's specification
Use a noid light or oscilloscope to verify that the PCM is sending a proper pulse signal to the injector
Check fuel pressure at the rail and compare it to the specified value for the engine
Swap the cylinder six injector with a known-good injector from another cylinder to see if the misfire follows the injector
If the injector and wiring test good, test the injector driver circuit in the PCM for proper operation and replace the PCM if faulty
After repairs, clear the code and perform a road test to confirm the fault does not return

What the injector pulse code really tells you

A P2B05 can be set by a marginal injector that still flows fuel but has an electrical signature outside the expected window, so the engine may run fine while the code is stored.
Technicians often replace the injector only to find the real problem is a rubbed-through wire in the harness near the intake manifold, so always inspect the loom before condemning the injector.
A weak ignition coil or spark plug on cylinder six can cause a misfire that mimics an injector fault, so rule out secondary ignition components before chasing the injector circuit.
Low fuel pressure from a tired fuel pump can cause the PCM to see an abnormal injector pulse on one or more cylinders, so check fuel pressure before replacing parts.
This code is specific to the injector driver circuit and does not directly indicate a mechanical engine fault, but a persistent misfire can damage the catalytic converter over time.

Can I keep driving with P2B05?

You can usually drive the vehicle with this code, but avoid heavy acceleration and long trips until it is diagnosed, because a persistent misfire can overheat and damage the catalytic converter. If the check engine light begins flashing, stop driving and have the vehicle towed to a repair shop.

Tools that help

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