Mass or Volume Air Flow B Circuit Range/Performance - Air Flow Too High

Descripción

This code indicates that the car's computer is detecting too much air entering the engine based on the mass air flow sensor 'B' readings. This can lead to performance issues and affect fuel economy.

Pasos de reparación

1. 1 Check and clean the mass air flow (MAF) sensor B using MAF-specific cleaner spray — a dirty sensor is the most common cause of air flow reading errors.
2. 2 Inspect the air intake system for leaks, loose clamps, cracked hoses, or a poorly seated air filter housing lid that could allow unmetered air into the engine.
3. 3 Check the air filter for excessive dirt or damage, and replace if necessary to ensure proper airflow through the MAF sensor.
4. 4 Inspect the wiring harness and electrical connector to the MAF sensor B for damaged, corroded, loose, or chafed wires that could cause erratic readings.
5. 5 Test the MAF sensor B output using a scan tool to verify live data readings match expected values at idle and under load — compare to manufacturer specifications.
6. 6 Replace the mass air flow sensor B if cleaning does not resolve the issue and readings remain out of range.
7. 7 Have the engine control module (ECM) inspected and tested by a professional if all other components check out — ECM failure is rare but possible.

Diagnóstico y costo