P2B95Cold Start Injection 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
- P2B95 belongs to the cold-start strategy of petrol direct-injection engines: while the catalyst is heated, each injection is split into two or more small pulses, and the module checks via the injector coil voltage that every pulse really opened the injector. Unlike P2B08 to P2B0F, which name a cylinder, P2B95 is the engine-wide verdict. GM's 2025 table 25OBDG03A runs it once per trip during the strategy (catalyst under 550 °C, coolant −12 to 66 °C, 250–3,000 rpm, under 20 s run time) and relates missed pulses to all pulses; Type B. GM bulletins 18-NA-074 (2018 Malibu 1.5 l) and 20-NA-230 (2021 Equinox, Terrain, Malibu) cure false settings with ECM software. Stellantis uses the same name for the 2019 Jeep Cherokee 2.0 turbo (18-052-20). P2B96 is the warm counterpart.
- What you may notice
- Check engine light after two cold starts with the fault
- Usually no noticeable effect on driving
- Possibly rough running in the first seconds after a cold start
- Likely causes
- LikelyEngine software setting the code falsely (GM and Stellantis reflash bulletins)
- PossibleInjector opening sluggishly when cold due to deposits or wear
- RareHigh resistance or chafing in injector wiring
- RareRail pressure outside the expected range during cold start
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €0 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.