Mass Air Flow (MAF) Circuit Intermittent
What does this mean?
Code P0104 means the MAF sensor signal is cutting in and out intermittently. The PCM has detected erratic or unstable voltage readings from the MAF circuit.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Honda Hr-v models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
Common Causes
Damaged, chafed, or broken wiring harness
Corroded or loose electrical connector
Dirty or contaminated MAF sensor
Faulty Mass Air Flow (MAF) sensor
Symptoms to Watch For
- Check Engine Light is illuminated
- Rough or unstable idle
- Engine surging or fluctuating RPM
- Hesitation or stumble during acceleration
- Engine stalling or dying unexpectedly
How to Diagnose
Common Solutions
Clean the Mass Air Flow (MAF) Sensor: Contamination from dirt, oil vapor, or debris on the hot wire or film element can cause erratic readings. Use only a specialized MAF sensor cleaner (never carburetor or brake cleaner) and allow it to air dry completely before reinstallation.
Repair or Replace Damaged Wiring or Connector: If the visual inspection or electrical testing reveals damaged, corroded, or loose wiring/terminals at the MAF sensor connector or in the harness, these components must be repaired or replaced. Ensure proper crimping and use heat-shrink tubing for durable, weather-resistant repairs.
Replace the Mass Air Flow (MAF) Sensor: If cleaning and wiring checks do not resolve the intermittent issue, and live data continues to show erratic or implausible readings, the MAF sensor itself is likely faulty internally. Always use a high-quality, OEM-equivalent replacement part.
Repair Post-MAF Vacuum Leaks: If a vacuum leak was identified during diagnostics, repairing it is critical. This may involve replacing cracked vacuum hoses, intake manifold gaskets, PCV valves, or other components of the intake system.