OBD-II diagnostic trouble code
P0102Caution
Mass or Volume Air Flow Circuit Low Input
The airflow sensor's voltage signal is lower than physically plausible, usually pointing to a wiring fault or a failed sensor rather than an actual low-air condition.
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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 P0102?
You can usually keep driving with P0102, 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 P0102?
The cost varies too much by cause and vehicle to give a single figure here — a diagnosis will narrow it down.
What causes P0102?
Reviewed by Artyom SemenovAutomotive Editor · Fact-checked by Yauheni Kapliarchuk, Editor-in-Chief