P227F
Air Flow Restriction/Air Leak Between Air Filter and MAF (Bank 2)
Restriction or leak detected in the intake plumbing between the air filter and the mass-air-flow sensor on bank 2 — typically a cracked intake boot or torn filter element.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: easy
Symptoms
- Check engine light on
- Power loss, hesitation under acceleration
- Rough or unstable idle
- Increased fuel consumption
- Possible difficulty starting
Common causes
Ordered by how often each turns out to be the cause.
- Cracked intake bootCommon
Parts involved
- Intake Air Filter
- Intake Air Duct
- Mass Air Flow Sensor
P227F 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.