Investigating the P0100 Code on Your 2022 Lexus NX
A P0100 code on your 2022 Lexus NX indicates the ECM has detected a mass airflow (MAF) sensor circuit malfunction. The second-generation NX offers the 2.5L hybrid (NX 350h), 2.4L turbo (NX 350), or 2.5L PHEV (NX 450h+), all requiring accurate MAF data.
What P0100 Means
P0100 flags erratic, intermittent, or out-of-range MAF sensor signals. The NX 350's turbocharged engine has more complex intake plumbing than the naturally aspirated hybrid variants, creating additional potential failure points.
Common Symptoms
- Check engine light on
- Rough idle
- Reduced power and turbo response (NX 350)
- 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 seated filter
- Intake or charge air leak (15-20%) — Boot crack or turbo pipe leak (NX 350)
- Connector or wiring fault (10-15%) — Loose connection
- MAF sensor failure (10-15%) — Internal degradation
Warranty Status
Your 2022 NX is within Lexus's 4-year/50,000-mile basic 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)