Code result
P2174
Throttle Actuator Control System - Sudden Low Air Flow Detected
High severity
What it means
A sudden, large drop in MAF/MAP signal not matched by a pedal change — typically intake restriction, MAF failure, or actively-stuck-closed throttle plate.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Intake severely restricted
highOne of the most commonly reported causes for this code — check this first.
Related help
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