P2282: Air Leak Between Throttle Body and Intake Valves

What it means

The ECU detects unmetered air entering downstream of the throttle body. Typical sources are leaking intake-manifold gaskets, vacuum hoses or PCV components.

At a glance

• Usually lights the check-engine light
• Affects emissions; the car can fail an emissions test

How it works

Air entering between the throttle body and the intake valves bypasses the normal airflow measurement, upsetting the air-fuel mixture. P2282 sets when the control module detects this downstream intake leak, often from an intake-manifold gasket, vacuum hose, or PCV connection.

Common causes

Most likely first.

1. Leaking intake manifold gasket
2. Cracked vacuum hose

Symptoms

• Check-engine light on
• Rough or high idle
• Hissing from the intake area
• Hesitation or stalling
• Increased fuel consumption

How to diagnose it

1. Review freeze-frame data and idle fuel-trim and engine-speed readings to see whether the fault is strongest at idle.
2. Listen around the intake manifold, vacuum hoses, and PCV connections for a hiss that may indicate a leak.
3. Inspect vacuum hoses, PCV plumbing, and manifold connections for cracks, disconnections, or loose fittings.
4. Check the intake-manifold gasket area for signs of leakage and use an appropriate intake leak test if the source is not visible.
5. After repairing any leak, recheck idle behavior and fuel-trim data; investigate other intake components if the readings remain abnormal.

Common fixes

• Reconnect a loose vacuum hose or PCV connection downstream of the throttle body.
• Replace a cracked vacuum hose or damaged PCV hose.
• Secure a loose intake fitting.
• Replace a leaking intake-manifold gasket.
• Repair another confirmed leak between the throttle body and intake valves.

Can I keep driving?

If the engine idles steadily, drive gently and avoid heavy acceleration; stop if it stalls or becomes difficult to control in traffic. A significant leak can worsen rough running, stalling, and fuel economy.