P2172

Throttle Actuator Control System - Sudden High Air Flow Detected

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine idling
Reduced engine power
Dips during acceleration
Check Engine Light Illuminates
Increased fuel consumption

Causes

Air leak in the intake tract
Throttle Position Sensor Malfunction
Problems with the mass air flow sensor (MAF)
Throttle valve sticking
Faulty wiring or connectors

How to Fix

Check the intake tract for air leaks
Diagnose the throttle position sensor
Check the performance of the mass air flow sensor
Clean the throttle valve and check its mechanism
Check the integrity of electrical wiring and contacts

Related codes

P2171 P2173 P0121