replaced mass airflow sensor check engine light came back on still runing ruff
This rig has a drive time protocol that must be followed after the replacement of any sensors, the codes must be cleared and the drivetime performed, if during that time the check engine light comes back on then the repair was not made correctly and the system will have to be diagnosed all over again. Many people thing just cause the code come as a sensor that replacing the sensor will clear the code, on many occasions it does not, they find out later that it has a wiring or ECM failure.
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