P0102 — Mass or Volume Air Flow Circuit Low Input

Powertrain (engine/transmission)

This code signifies that the Powertrain Control Module (PCM) has detected a low input signal from the Mass Air Flow (MAF) sensor. This typically means the voltage signal from the MAF sensor is lower than expected for current engine operating conditions.

The MAF sensor measures the amount of air entering the engine, which is critical for fuel mixture calculations. This DTC specifically monitors for an abnormally low signal, indicating either insufficient air measurement or a sensor/circuit issue.

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Can I drive with P0102?

You can usually drive home and book an inspection within a few days.

Likely root causes

• Faulty Mass Air Flow (MAF) sensor
• Open circuit or short to ground in the MAF sensor wiring
• Intake air restriction (e.g., clogged air filter, collapsed intake tube)

Frequently asked questions

What does fault code P0102 mean?

P0102 means Mass or Volume Air Flow Circuit Low Input.

Can I keep driving with P0102?

You can usually drive home and book an inspection within a few days.

Related fault codes

• P0100 — Mass or Volume Air Flow Circuit Malfunction
• P0101 — Mass or Volume Air Flow Circuit Range/Performance
• P0103 — Mass or Volume Air Flow Circuit High Input
• P0104 — Mass or Volume Air Flow Circuit Intermittent
• P0105 — Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction
• P0106 — Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance
• P0107 — Manifold Absolute Pressure/Barometric Pressure Circuit Low Input
• P0108 — Manifold Absolute Pressure/Barometric Pressure Circuit High Input
• P0109 — Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent

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