Air Leak Between Throttle Body and Intake Valves
The ECU detects unmetered air entering downstream of the throttle body. Typical sources are leaking intake-manifold gaskets, vacuum hoses or PCV components.
Affected components
- Intake manifold
- Intake manifold gasket
- Vacuum hoses
- Pcv valve
Common causes
- High likelihood: Leaking intake manifold gasket
- Medium likelihood: Cracked vacuum hose
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.