P2ADF

Intake Air System Leak Bank 2

Moderate severity

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.

Common causes

Cracked intake hose between MAF and throttle
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $90-550
Intake manifold gasket leaking
A plausible cause — test and verify before replacing parts.
medium
Typical part cost: $90-550
See all causes + fix costs
Create a free Wrenchify account to unlock the rest for P2ADF.
Unlock causes
Free forever · No credit card

First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

Get the full step-by-step diagnosis

Create a free Wrenchify account to unlock the rest for P2ADF.

Unlock diagnosis

Free forever · No credit card

Related codes

See related trouble codes

Create a free Wrenchify account to unlock the rest for P2ADF.

Unlock related codes

Free forever · No credit card

Frequently asked questions

What does P2ADF mean?

P2ADF means "Intake Air System Leak Bank 2". It is a generic OBD-II code that points to a fault in the auxiliary emission controls.

What are the most common causes of P2ADF?

cracked intake hose between maf and throttle; intake manifold gasket leaking — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

Get the full P2ADF diagnosis for your vehicle

Year, make, model + step-by-step repair help — free plan included.

Diagnose P2ADF