OBD-II diagnostic trouble code
P0103Caution
Mass or Volume Air Flow Circuit High Input
The airflow sensor's voltage signal is higher than physically plausible, which typically means a wiring short or connector fault rather than genuinely excessive intake air.
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Code names are compiled from open/standardized SAE and ISO references. Explanations, symptoms, causes and fixes are original. Covers generic (P0/C0/B0/U0) codes only — manufacturer-specific codes are planned for a future update.
Frequently asked questions
Can I drive with P0103?
You can usually keep driving with P0103, but don't put it off — the underlying cause can get worse or lead to further damage the longer it goes unaddressed. Get it diagnosed as soon as you reasonably can.
How much does it cost to fix P0103?
The cost varies too much by cause and vehicle to give a single figure here — a diagnosis will narrow it down.
What causes P0103?
Reviewed by Artyom SemenovAutomotive Editor · Fact-checked by Yauheni Kapliarchuk, Editor-in-Chief