P0103 — Mass or Volume Air Flow Circuit High Input

Powertrain (engine/transmission)

DTC P0103 indicates that the engine control module (ECM) or powertrain control module (PCM) has detected a higher than expected signal voltage from the Mass Air Flow (MAF) sensor circuit. This implies an issue with the sensor's readings, which could affect fuel delivery and engine performance.

This code monitors the Mass Air Flow (MAF) sensor circuit performance, specifically ensuring the signal voltage remains within expected operating parameters for accurate air intake measurement.

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Can I drive with P0103?

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

Likely root causes

• Faulty Mass Air Flow (MAF) sensor, often due to contamination or internal electrical failure, leading to an incorrect high voltage reading.
• Wiring issues in the MAF sensor circuit, such as a short to voltage or damaged wiring causing an elevated signal.
• Contaminated air filter or an obstruction in the air intake ducting, restricting airflow and causing the MAF sensor to misread under certain conditions.

Frequently asked questions

What does fault code P0103 mean?

P0103 means Mass or Volume Air Flow Circuit High Input.

Can I keep driving with P0103?

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
• P0102 — Mass or Volume Air Flow Circuit Low 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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