Investigating the P0100 Code on Your 2022 GMC Acadia
When your 2022 GMC Acadia triggers a P0100 code, the ECM has detected a malfunction in the mass airflow (MAF) sensor circuit. The second-generation Acadia's 3.6L V6 engine needs reliable MAF data for fuel injection and emissions management, and this code indicates those readings are compromised.
What P0100 Means
P0100 flags erratic, intermittent, or out-of-range MAF sensor signals. The naturally aspirated V6 uses a hot-film MAF sensor in the intake tract to measure incoming air volume for fuel injection and ignition timing calculations.
Common Symptoms
- Check engine light on
- Rough or fluctuating idle
- Reduced power
- Poor fuel economy
- Hesitation during acceleration
- Possible stalling
Top Causes Ranked by Likelihood
- MAF sensor contamination (35-40%) — Oil vapor and debris fouling the sensing element
- Air filter issue (20-25%) — Dirty or improperly installed filter
- Intake duct leak (15-20%) — Cracked boot or loose clamp
- Connector or wiring fault (10-15%) — Corroded or loose MAF connection
- MAF sensor failure (10-15%) — Internal sensor degradation
Diagnostic Steps
Inspect the air filter and MAF connector. Clean the MAF sensor with dedicated cleaner spray ($10-15). Check the intake duct for cracks or loose clamps. Use GM GDS2 or a compatible scan tool for live MAF data analysis.
Warranty Status
Your 2022 Acadia's basic warranty (3yr/36k) runs through 2025. The powertrain warranty (5yr/60k) extends through 2027. Federal emissions warranty covers the MAF for 8 years/80,000 miles through 2030.
Estimated Repair Costs
- MAF sensor cleaning: $10-15 (DIY)
- Air filter replacement: $20-35
- MAF sensor replacement: $100-250 (OEM) + $80-150 (labor)
- Intake duct repair: $40-90 + $60-100 (labor)