P2ADF
Intake Air System Leak Bank 2
The ECM detects a leak in the intake air system on bank 2. Air entering downstream of the MAF sensor causes lean fuel trim and unmetered air ingress.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Common causes
Ordered by how often each turns out to be the cause.
- Cracked intake hose between MAF and throttleCommon
- Intake manifold gasket leakingPossible
Parts involved
- Intake Manifold B2
- Intake Hoses B2
- Intake Gaskets B2
P2ADF 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.