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Code

P0102

Air intake

Mass airflow sensor circuit low input

The MAF sensor signal is too low.

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Most likely causes

Faulty MAF sensor
Open circuit wiring
Air leak past the MAF

Symptoms you may notice

Check engine light
Hard start
Poor power
Rough idle

Checks to run

Measure MAF signal voltage
Inspect wiring and connector
Check the air filter

Tools you may need

Multimeter OBD-II scanner

Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in Air intake

Intake air temperature sensor circuit high input

Mass airflow sensor circuit malfunction

Mass airflow sensor range / performance problem

MAP sensor range / performance problem

Intake air temperature sensor circuit malfunction

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