Pin16

P21xx

Fuel and air metering

How much air and fuel the engine is receiving, and the sensors that measure it - mass airflow, manifold pressure, intake air temperature, oxygen sensors and fuel trim.

Read this code from your own car

Plug an ELM327 adapter into the OBD-II port under the dashboard. Pin16 reads every stored, pending and permanent code, explains each one like this page does — offline, with no account — and shows what the car recorded when the fault was set.

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