P2B96Injection Pulse Performance
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P2B96 is the engine-wide check, outside the cold-start phase, that injectors on a direct-injection petrol engine really open when commanded. The module digitises the voltage across each injector and looks for the small kink the moving armature leaves; if commanded pulses repeatedly show no opening, it assumes fuel was not delivered. GM's 25OBDG03A table runs this continuously in 100 ms steps as a global missing-pulse test beside the per-cylinder codes P2B00 to P2B07, Type B. GM's PIT5677 lists P2B96 among codes from chafed engine harnesses on 2019 Silverado/Sierra 1500 with the 2.7 l L3B, and the Encore GX/Trailblazer service update A202310450 cures it with ECM software. Mitsubishi files P2B96 under the injection system in its 2022 Outlander manual update. P2B95 covers the cold-start phase.
- What you may notice
- Check engine light after two drives with the fault
- Misfire or rough running if fuel is really missing
- Often other codes from the same harness or injector fault
- Likely causes
- PossibleEngine harness chafed against underhood parts (GM 2.7 l L3B)
- PossibleEngine software detecting falsely, fixed by reprogramming
- PossibleInjector armature sticking or injector worn
- RareHigh resistance in an injector circuit or connector
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.