Diagnostic Aids

Any type of contamination on the MAF sensor heating elements will degrade the proper operation of the sensor. Certain types of contaminants act as a heat insulator, which will impair the response of the sensor to airflow changes. Water or snow can create the opposite effect, and cause the signal to increase rapidly.
Certain aftermarket air filters may cause this DTC to set.
Certain aftermarket air induction systems may cause this DTC to set.
Modifications to the air induction system may cause this DTC to set.