Investigating the P0100 Code on Your 2022 Lexus IS
When your 2022 Lexus IS triggers a P0100 code, the ECM has detected a malfunction in the mass airflow (MAF) sensor circuit. The refreshed IS offers the 2.0T (IS 300 RWD), 3.5L V6 (IS 300 AWD/IS 350), or the 5.0L V8 (IS 500), all needing reliable MAF data.
What P0100 Means
P0100 indicates erratic, intermittent, or out-of-range MAF sensor signals. The IS's range of engines — from turbo four to V8 — all use hot-wire MAF sensors in their respective intake tracts.
Common Symptoms
- Check engine light on
- Rough idle
- Reduced power
- Poor fuel economy
- Hesitation during acceleration
Top Causes Ranked by Likelihood
- MAF sensor contamination (35-40%) — Oil vapor and debris
- Air filter issue (20-25%) — Dirty or improperly installed filter
- Intake or charge air leak (15-20%) — Boot crack or pipe leak
- Connector or wiring fault (10-15%) — Loose connection
- MAF sensor failure (10-15%) — Internal degradation
Warranty Status
Your 2022 IS is within Lexus's 4-year/50,000-mile warranty through 2026. Powertrain (6yr/70k) through 2028. Emissions: 8yr/80k through 2030.
Estimated Repair Costs
- MAF sensor cleaning: $10-15 (DIY)
- MAF sensor replacement: $140-320 (OEM) + $80-150 (labor)