P0102
Medium SeverityMass Air Flow Sensor Circuit Low Input
Fuel System
What Does P0102 Mean?
The MAF sensor is reporting lower airflow than expected. The engine thinks less air is entering than actually is, causing a lean condition.
Common Fix
Replace MAF sensor
Estimated Cost (DIY)
$40 - $150
Symptoms
- β οΈStalling
- β οΈHard starting
- β οΈLoss of power
- β οΈLean misfire
Common Causes
Failed MAF sensorlikely
Vacuum leakpossible
Restricted air filterpossible
Wiring issue to MAFpossible
How to Diagnose P0102
- 1Check MAF sensor connector
- 2Clean MAF sensor
- 3Inspect air filter
- 4Check for disconnected vacuum hose
Need to read or clear this code?
Shop OBD2 Scanners on Amazon βReady to fix it yourself?
View Step-by-Step Repair Guide βSelect your exact vehicle for a personalized guide
Frequently Asked Questions
- Is P0102 the same as P0101?
- P0102 specifically means low airflow reading, while P0101 is out-of-range. P0102 usually means the sensor has failed rather than just being dirty.
- Can I drive with P0102?
- The car may stall or run very poorly. Drive only if necessary and get it fixed quickly.
Need a diagnosis for your specific vehicle?
Start Free AI Diagnosis β100% Free β No signup required