have a po103 code that wont clear

Question

I have an 08 Buick enclave it has a p0103 code for the mass air flow sensor, i have replaced the sensor and the connector i can clear the code and it will stays off while you drive until you restart the vehicle i am going to check the wiring harness to insure its OK not damaged or grounded everything else is new or has been cleaned and checked so I am running out of ideas as to the cause. not sure if this helps but this code replaced a code for the knock sensors, i was able to replace one of them as there are two of them and be for i could get to the second one the code for the knock sensors was replaced with the p0103 code

Answer 1

P0103 Mass airflow sensor circuit high frequency

This is a very rare code condition that is encountered, Per Buick this code set when there is a short between the IAT and the MAF sensor. Once area that they fail to mention is the MAP sensor, the MAP sensor tends to collapse or split in two pieces. when that happens it set a MAF code. but this would have hard time accelerating,it worth the checking. just slightly tug on the MAP sensor connection and note any change in idle. if there is the MAP is suspected

Comments

so i have replaced the map sensor and the vehicle dose run better but iam still getting the code. iam at a lost as to were to go from here. need to get this fixed as winter is right around the corner here in north dakota

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Here this a test procedure for the MAF sensor, for  a P0103 , if you have a scan tool that can read the data for the MAF sensor that would help, I belive  that you may have a faulty MAF sensor, in most cases where a Buick set a P0103 it just that a MAF, new does not mean good. there been many time part store delivered faulty part, tested it with a labscope and there it was a faulty MAF sensor the MAF has a core they say they rebuild but who knows

Verify the integrity of the air induction system by inspecting for the following conditions:
Loose or improper installation
Water intrusion
Ignition OFF, disconnect the MAF/IAT harness connector at the MAF/IAT sensor.
Ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the ground circuit terminal C and ground.
If greater than the specified range, test the ground circuit for an open/high resistance.
Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal B and ground.
If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
Ignition ON, test for 4.8-5.2 volts between the signal circuit terminal A and ground.
If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ECM.
Ignition OFF, connect the red lead of the J 38522 to the signal circuit terminal A at the MAF/IAT sensor harness connector. Connect the battery voltage supply to B+, and ground the black lead.
Set the J 38522 signal to 5 volts, the Frequency to 5K, and the Duty Cycle to Normal.
Engine idling, observe the scan tool MAF Sensor parameter. The scan tool MAF Sensor parameter should be between 4,950-5,025 Hz.
If the MAF Sensor parameter is not within the specified range, replace the ECM.
If all other circuits test normal, replace the MAF sensor.