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P0102

Medium Severity

Mass 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

  • ⚠️Stalling
  • ⚠️Hard starting
  • ⚠️Loss of power
  • ⚠️Lean misfire

Common Causes

Failed MAF sensorlikely
Vacuum leakpossible
Restricted air filterpossible
Wiring issue to MAFpossible

How to Diagnose P0102

  1. 1Check MAF sensor connector
  2. 2Clean MAF sensor
  3. 3Inspect air filter
  4. 4Check for disconnected vacuum hose

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Related Codes

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.

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