P2B95
Cold Start Injection Pulse Performance
During cold start, the ECM detects that the overall injection pulse performance does not match the calibrated cold-start strategy. Combustion stability is reduced during warm-up.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Injectors aged - flow drift across cylindersCommon
- Fuel rail pressure drifts during pulsePossible
Parts involved
- Fuel Injectors
- ECM
- Fuel Rail
P2B95 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.