Investigating the P0100 Code on Your 2022 Hyundai Tucson
A P0100 code on your 2022 Hyundai Tucson means the ECM has detected a malfunction in the Mass Air Flow (MAF) sensor circuit. Your 4th-generation Tucson's 2.5L Smartstream engine relies on precise MAF data for fuel delivery and 8-speed transmission management. With Hyundai's generous warranty likely still active, let's investigate your options.
MAF Sensor on the 2022 Tucson
The 2022 Tucson's 2.5L Smartstream MPI engine (187 hp) uses a hot-wire MAF sensor to measure incoming air. The ECM uses this data for fuel injection, ignition timing, and coordinating the 8-speed automatic transmission. P0100 indicates the MAF circuit signal is outside expected parameters after three-plus years of service.
Symptoms
- Check engine light on with P0100
- Hesitation during acceleration
- Rough or unstable idle
- Fuel economy below the 26-33 mpg range
- 8-speed automatic may shift roughly or hunt
- Possible reduced power mode
Ranked Causes
- Contaminated MAF sensor element (35-40%) — Oil vapor deposits from the PCV system after three-plus years.
- Air intake leak (20-25%) — Cracked hose, loose clamp, or improperly seated air filter.
- MAF sensor failure (15-20%) — Internal electronics degradation.
- Wiring or connector issue (10-15%) — Corrosion or damage from environmental exposure.
- Air filter condition (5-10%) — Neglected or damaged filter.
Diagnosis and Repair
- Check warranty — Your 2022 Tucson is likely still within Hyundai's 5-year/60,000-mile basic warranty (through ~2027). The emissions warranty (8yr/80k) covers through 2030.
- If under warranty, visit the dealer — No-cost repair using Hyundai's GDS diagnostic system.
- If out of warranty by mileage — Scan codes, inspect the intake system, and try cleaning the MAF sensor first ($10-15).
- Monitor live data — Compare MAF readings against Smartstream 2.5L specifications.
Repair Costs
- Under warranty: $0 (likely still covered)
- MAF sensor cleaning: $10-15 (DIY)
- MAF sensor replacement: $110-240 parts, $50-100 labor
- Intake hose: $30-80
- Wiring repair: $80-200