P0104 - Mass or Volume Air Flow Circuit Intermittent

The mass air flow sensor signal is intermittent or unstable.

Code Overview

The mass air flow sensor signal is intermittent or unstable.

Common Causes

• Dirty or failing mass air flow sensor
• Loose connector or poor terminal contact
• Damaged wiring causing signal dropouts
• Air leak or intake turbulence affecting the reading

Symptoms

• Intermittent hesitation or stumble
• Idle quality changes that come and go
• Unstable airflow readings on the scan tool

Diagnostic Steps

1. Wiggle-test the MAF connector and harness while watching live data
2. Inspect and clean the MAF sensor with MAF-safe cleaner if appropriate
3. Check intake ducting, clamps, and boots for leaks or poor fitment
4. Look for signal dropouts on the scan tool before replacing parts

Repair Difficulty

Moderate

General difficulty estimate for the most common repair path.

Likely Repairs & Cost Guides

Use test results to confirm the fault before pricing the repair.

Related OBD Codes

Browse the closest code-family pages when the same fault pattern often shows up nearby.

Next Steps

Move from the code to a diagnosis path, then into repair pricing once the fault is confirmed.