Powertrain
generic / SAE
P2172
Throttle Actuator Control System - Sudden High Air Flow Detected
A sudden, large jump in MAF/MAP signal not matched by a corresponding pedal change has been detected — typically a torn intake boot, dropped MAF sensor, or actively-stuck-open throttle plate.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number1 / 72
Possible causes
- Torn intake boot high
- MAF sensor connection lost medium
Symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 40–600 €
- Estimated time: 0.3–2.5 h
- Component: electronic throttle body
- Component: mass air flow sensor
- Component: intake air duct
- MIL / check engine light
- emissions-relevant
- limp mode possible
Sources
References
sae:J2012