Throttle Actuator Control System - Low Air Flow Detected
Sustained low air-flow condition detected — slower than P2174 but persistent. Restricted air filter, dirty MAF, or partially-stuck throttle.
Affected components
- Mass air flow sensor
- Intake air filter
- Electronic throttle body
Common causes
- High likelihood: Air filter heavily restricted
- Medium likelihood: MAF sensor contaminated
Possible symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
Related codes
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.