Throttle Actuator Control System - Sudden Low Air Flow Detected

Where it lives

For P2174, the part to look at first is the actuator named here.

Check these first

• A faulty throttle position sensor
• A malfunctioning throttle actuator
• A clogged air filter
• A dirty or faulty mass airflow sensor
• A throttle body or intake manifold restriction

What to do next

1. Read the throttle position and mass airflow on a scan tool
2. Check the air filter for a restriction
3. Clean the mass airflow sensor and throttle body
4. Inspect the intake manifold for a blockage
5. Test the throttle actuator for a fault
6. Clear the code and retest

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