What are the common causes of P00B8?

A dirty or failed mass airflow sensor. A dirty or failed manifold absolute pressure sensor. A vacuum leak on bank 2. Corroded wiring on the airflow or pressure circuit. A faulty ECM comparing the two.

Compare airflow and pressure readings at idle and at speed. Clean the airflow sensor and recheck the values. Smoke test bank 2 for a vacuum leak. Inspect the airflow and pressure connectors and wiring. Replace whichever sensor reads off from the other. Clear the code and retest.

P00B8

MAP - Mass or Volume Air Flow Correlation Bank 2

System: Fuel and air metering (P code)
Lamp: Check Engine Light
Category: Powertrain - Fuel/Air Metering

What it means

P00B8 means MAP - Mass or Volume Air Flow Correlation Bank 2.

Check these first

A dirty or failed mass airflow sensor
A dirty or failed manifold absolute pressure sensor
A vacuum leak on bank 2
Corroded wiring on the airflow or pressure circuit
A faulty ECM comparing the two

What to do next

Compare airflow and pressure readings at idle and at speed
Clean the airflow sensor and recheck the values
Smoke test bank 2 for a vacuum leak
Inspect the airflow and pressure connectors and wiring
Replace whichever sensor reads off from the other
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.