Tracking Down P0100 on Your 2020 Chevrolet Colorado
A P0100 code on your 2020 Chevrolet Colorado means the ECM has detected a malfunction in the mass air flow (MAF) sensor circuit. Your 2nd-generation Colorado uses the 2.5L I4, 3.6L V6, or 2.8L Duramax diesel, all relying on accurate MAF readings for fuel delivery.
Symptoms
- Check engine light on
- Rough or unstable idle
- Hesitation during acceleration
- Reduced power—noticeable when towing
- Poor fuel economy
- Possible stalling
Common Causes
- Contaminated MAF sensor (36%) — Five-plus years of dust, oil, and debris. Truck use in dusty conditions accelerates this.
- Wiring or connector degradation (22%) — Heat and vibration.
- Faulty MAF sensor (17%) — Internal failure.
- Intake air leak (13%) — Loose boot or clamp.
- Air filter restriction (8%) — Overdue replacement.
- ECM issue (4%) — Rare.
Diagnostic Steps
- MAF sensor cleaning — Remove and clean with MAF cleaner spray.
- Air filter replacement — Fresh filter, especially if used in dusty conditions.
- Connector inspection — Check for corrosion.
- 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–$315
- Intake boot: $70–$190
- Wiring repair: $90–$265
Warranty
Your 2020 Colorado's basic warranty has expired. The federal emissions warranty covers the MAF sensor for 8 years/80,000 miles through 2028.