Investigating the P0100 Code on Your 2024 Hyundai Sonata
A P0100 code on your 2024 Hyundai Sonata signals a malfunction in the Mass Air Flow (MAF) sensor circuit. Your 8th-generation Sonata's 2.5L Smartstream engine depends on accurate airflow data for its efficiency-optimized fuel delivery. Under full factory warranty with Hyundai's generous coverage, your dealer should resolve this at no cost.
The MAF System on the 2024 Sonata
The 2024 Sonata's 2.5L Smartstream MPI engine (191 hp) uses a hot-wire MAF sensor to measure incoming air. The ECM uses this data for fuel injection, ignition timing, and 8-speed automatic transmission management. P0100 indicates the circuit signal is outside expected parameters.
Symptoms
- Check engine light on with P0100
- Hesitation during acceleration
- Rough idle
- Fuel economy below the expected 28-38 mpg ratings
- 8-speed automatic may shift roughly
- Possible reduced power mode
Common Causes
- Contaminated MAF sensor element (30-35%) — PCV oil vapor contamination even on new vehicles.
- Intake system leak (20-25%) — Loose connection or improperly seated component.
- MAF sensor or circuit defect (20-25%) — Manufacturing defect—warranty claim.
- Software calibration issue (10-15%) — ECM updates may address sensor parameters.
- Connector or wiring fault (5-10%) — Assembly-related issues.
Warranty-First Approach
Your 2024 Sonata is covered under Hyundai's 5-year/60,000-mile basic warranty through approximately 2029 and the 8-year/80,000-mile federal emissions warranty through 2032:
- Document symptoms — Note when the light appeared and driving conditions.
- Contact your Hyundai dealer — Schedule warranty service mentioning P0100.
- Request TSB check — Ask about Technical Service Bulletins using GDS diagnostics.
- Keep records — Save repair documentation.
Reference Costs (If Out of Warranty)
- Under warranty: $0
- MAF sensor cleaning: $10-15
- MAF sensor replacement: $110-240 parts, $50-100 labor
- Intake repair: $30-100