P0100 on Your 2022 Toyota Tacoma
A P0100 code on your 2022 Toyota Tacoma indicates the ECM has detected a malfunction in the mass air flow (MAF) sensor circuit. Your 3rd-generation Tacoma uses either the 2.7L four-cylinder or 3.5L V6, and truck use often exposes the MAF sensor to more contamination than typical passenger cars.
Symptoms
- Check engine light on
- Rough or unstable idle
- Hesitation during acceleration
- Reduced power under load
- Poor fuel economy
- Possible stalling
Common Causes
- Contaminated MAF sensor (35%) — Dust, oil, and debris on the sensing element. Truck use in dusty conditions accelerates this.
- Wiring or connector issues (22%) — Three-plus years of heat and vibration, aggravated by rough terrain.
- Faulty MAF sensor (18%) — Internal sensor failure.
- Intake air leak (13%) — Cracked boot or loose clamp.
- Air filter restriction (7%) — Overdue replacement.
- ECM issue (5%) — Rare fault.
Diagnostic Steps
- MAF sensor cleaning — Remove and clean with dedicated MAF cleaner spray.
- Air filter check — Replace if dirty. Check sooner if used off-road.
- Connector inspection — Check for dirt, corrosion, or looseness.
- Intake inspection — Check all post-MAF connections.
- Scan tool data — Verify MAF readings.
- MAF replacement — If cleaning doesn't resolve it.
Repair Costs
- MAF cleaning: $10–$15 (DIY)
- Air filter: $15–$30 (DIY)
- MAF sensor: $130–$320
- Intake boot: $70–$185
- Wiring repair: $90–$260
Warranty
Your 2022 Tacoma's 3-year/36,000-mile warranty extends through 2025. The federal emissions warranty covers the MAF sensor for 8 years/80,000 miles through 2030.