If you suspect the condition may be related to aftermarket accessories, refer to Checking Aftermarket Accessories in Wiring Systems.Ĭheck this it is here as an aid in resolving your P0101 trouble code (DTC).ĮGR stands for Exhaust Gas Recirculation. * Any loss of vacuum to the MAP sensor can cause this DTC to set. * A high resistance on the ground circuit of the MAP sensor can cause this DTC to set. This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude. With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level. The value shown for the MAP sensor display varies with the altitude. A skewed MAP sensor will cause the calculated MAF value to be inaccurate. * When the engine is running the MAP sensor value is continually updated near WOT. * The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON.
If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. * A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. Inspect for any vacuum leaks downstream of the MAF sensor. * A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration. Then start with the cheapest, easiest repair procedures:Īn incorrectly routed harness-Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components: Possible Solutions: The simplest thing to do is to reset the code and see if it comes back. Symptoms: You will likely not notice any serious drivability problems, although there may be symptoms. Other MAF sensor circuit DTC trouble codes are P0100, P0102, P0103, and P0104. The PCM detects that the actual MAF sensor frequency signal is not within a predetermined range of the calculated MAF value for more than 4.0 seconds. P0101 - Mass Air Flow (MAF) Circuit Range/Performance Problemīasically this means that there is a problem with the Mass Air Flow (MAF) sensor or circuit.
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