Investigating the P0100 Code on Your 2022 Hyundai Santa Fe
A P0100 code on your 2022 Hyundai Santa Fe means the ECM has detected a malfunction in the Mass Air Flow (MAF) sensor circuit. Your 4th-generation Santa Fe's 2.5L Smartstream engine relies on precise airflow data for fuel efficiency and performance. With Hyundai's generous warranty likely still active, let's investigate your options.
MAF Sensor on the 2022 Santa Fe
The 2022 Santa Fe's 2.5L Smartstream MPI engine (191 hp) uses a hot-wire MAF sensor to measure incoming air for fuel injection, ignition timing, and 8-speed automatic transmission management. After three-plus years, the sensing element may have accumulated contamination from PCV oil vapors.
Symptoms
- Check engine light on with P0100
- Hesitation during acceleration
- Rough idle
- Fuel economy below the 25-32 mpg range
- 8-speed automatic may shift erratically
- Possible reduced power mode
Ranked Causes
- Contaminated MAF sensor element (35-40%) — Oil vapor buildup after three-plus years.
- Air intake leak (20-25%) — Loose connection or cracked hose.
- MAF sensor failure (15-20%) — Internal electronics degradation.
- Wiring or connector issue (10-15%) — Corrosion or environmental damage.
- Air filter condition (5-10%) — Neglected filter.
Diagnosis and Repair
- Check warranty — Your 2022 Santa Fe is likely within Hyundai's 5-year/60,000-mile basic warranty (through ~2027). The emissions warranty (8yr/80k) covers through 2030.
- If under warranty — Visit dealer for no-cost repair.
- If out by mileage — Scan codes, inspect intake, clean MAF sensor.
- Monitor data — Compare MAF readings against Smartstream 2.5L specifications.
Repair Costs
- Under warranty: $0 (likely covered)
- MAF sensor cleaning: $10-15 (DIY)
- MAF sensor replacement: $110-240 parts, $50-100 labor
- Intake hose: $30-80
- Wiring repair: $80-200