Honda Check Engine Code
P0101 on Honda
Mass Air Flow (MAF) Sensor Circuit Range/Performance
Also covers: Acura
P0101 on Honda: what makes it different
On modern Honda models, especially those with the turbocharged 1.5L engine family, P0101 (MAF sensor circuit range/performance) often shows up because the mass airflow sensor sits in an intake tract that's sensitive to contamination and leaks, and the turbocharged setup adds extra plumbing where problems can occur.
Most-affected engines
- 1.5L turbo L15B7 (Civic, CR-V, Accord)
- 2.4L K24 (CR-V, Accord non-turbo)
Common model years: 2016–2022
Most likely cause on Honda
Dirty or oil-contaminated MAF sensor
Known Honda engine-family issues
Honda's 1.5L turbo engines have had documented discussion around oil vapor reaching the intake system via the PCV path, which over time can leave a film on the MAF sensor's sensing element and throw airflow-related codes.
Honda-specific causes (most common first)
- MAF sensor contamination, often from oil residue carried by aftermarket oiled air filters
- Intake air leak after the MAF sensor, particularly at turbo intake couplers on the 1.5T engine
- Clogged or heavily dirty factory air filter restricting airflow readings
- Failing MAF sensor element itself (age-related drift)
- Corroded or loose wiring connector at the MAF sensor plug
- PCV system issues allowing oil vapor to reach the intake tract over time
Honda-specific diagnostic tip
Before replacing the MAF sensor, remove it and visually check for an oily film on the sensing element. If present, clean it only with a MAF-safe electronic cleaner (never touch the fragile wire or film element), then clear the code and recheck instead of jumping straight to a new sensor.
Symptoms drivers report
- Check engine light
- Rough idle or hesitation on acceleration
- Stalling, especially at low speed
- Noticeable drop in fuel economy
- Black smoke from the exhaust if running rich
Typical repair cost on Honda
Most Honda owners fix P0101 for between $80 and $300, depending on which underlying cause turns out to be at fault. Start with the most-likely cause for your vehicle — Dirty or oil-contaminated MAF sensor — before throwing parts at it.
Honda P0101 FAQ
Can an aftermarket air filter cause P0101 on my Honda?
Yes — oiled aftermarket filters can shed oil residue onto the MAF sensor over time, especially on turbocharged engines, which throws off its airflow readings and can trigger P0101.
Is P0101 common specifically on the Honda 1.5L turbo engine?
It's reported fairly often on this engine family, partly due to intake design and partly due to discussions around oil vapor reaching the intake tract through the PCV system.
Do I always need a new MAF sensor to fix P0101 on my Honda?
Not always — cleaning a contaminated sensor or fixing an intake air leak resolves the issue in many cases without needing a full sensor replacement.
Related codes
Drive a different make? See the general P0101 guide for cross-vehicle causes and symptoms.
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Most common fix for P0101:
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