P0101 means your mass air flow (MAF) sensor is sending readings outside the expected range for the current engine speed and throttle position. The ECU uses MAF data to calculate fuel injection, so bad readings cause incorrect air-fuel mixture and poor engine performance.
DTC/P0101·Honda
P0101 on Honda: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)Honda
P0101 on a Honda means your mass air flow (MAF) sensor is sending readings outside the expected range for the current engine speed and throttle position. The ECU uses MAF data to calculate fuel injection, so bad readings cause incorrect air-fuel mixture and poor engine performance.
Repair cost on Honda€7 - €342
What does P0101 mean on a Honda?
Honda Civic
2006-2024Honda uses a Keihin MAF integrated into the airbox on many Civic models. The 1.5T (2016+) is more sensitive to MAF contamination due to the turbo's pressure dynamics. The intake boot between the MAF and turbo inlet is a known failure point for air leaks.
What causes P0101 on a Honda?
Beyond the generic causes listed on the main P0101 page, these are the Honda-specific patterns we see most often:
Honda CivicIntake boot cracking between MAF and turbo inlet on 1.5T
Honda CivicMAF contamination from PCV blow-by on high-mileage R18A
How to diagnose P0101 on a Honda with OBD2
Follow these steps to pinpoint the root cause of P0101:
- Check and replace air filter if clogged (cheapest fix first)
- Inspect intake tract between MAF sensor and throttle body for cracks, loose clamps, or disconnected hoses
- Clean MAF sensor with dedicated MAF cleaner spray. Never touch the sensor element or use brake/carb cleaner
- Try unplugging the MAF and driving briefly. If the car runs better, the MAF is sending bad data
- Check live data: MAF reading at idle should be 2-7 g/s for most 4-cylinder engines, 5-15 g/s for V6/V8. At 2500 RPM, values should scale proportionally
- If cleaning doesn't resolve, replace the MAF sensor
How much does P0101 cost to fix on a Honda? (EUR)
Estimated repair costs on a Honda (Honda parts and labour typically run 10% below the average for this code).
Prices estimated as of May 2026. Costs vary by region, vehicle, and shop.
Related codes that often appear with P0101 on Honda
These codes commonly cluster with P0101 on Honda vehicles:
FAQ: P0101 on Honda
Can I drive with P0101?
Yes, but the engine may run poorly. The ECU uses estimated airflow when the MAF is unreliable, causing rough idle and hesitation. Safe to drive to a shop.
Can cleaning the MAF sensor fix P0101?
About 50% of the time, yes. Use dedicated MAF sensor cleaner spray. Costs under 15 euros and takes 10 minutes.
What happens if I unplug the MAF sensor?
The engine runs on a default airflow table. If it runs better unplugged, the sensor is confirmed bad. Don't drive long distances this way.
Can a dirty air filter cause P0101?
Yes. A clogged filter changes airflow velocity across the MAF sensor, pushing readings out of range. Replace the filter first. Costs 10-25 euros.
Looking for the full P0101 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0101 guideSkanyx · Honda
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