Question about 2003 GMC Sierra 2500HD

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I have a GMC Sierra HD 2500 that is showing zero flow on the MAF sensor, before I replace it does any one know the operating voltage and wiring schematics at the MAF sensor? Thanks Marv

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It is all ecu controlled Marv

Posted on Jun 15, 2009

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1996 gmc sierra 5.7L what would cause engine codes p0102, p0108, p0121,p0300 at same time?


p0102 is MAF mass air flow , circuit low input. Try these to reset code by trying following.
Verify that the Mass Air Flow Sensor wiring is connected properly and that there are no broken / frayed wires. Inspect for any air leaks near the MAF sensor. Take the MAF out and clean it using a spray cleaner such as brake cleaner or electrical contact cleaner. Be gentle with the sensor. Check the voltage of the MAF sensor (refer to a repair manual for vehicle specific information) Replace the MAF sensor.
P0121 Throttle Position Sensor/Switch A Circuit Range/Performance Problem
P0108 EGR Barometric Pressure Sensor Input Signal is out of self test Range. P0300 Random Misfire Detected.

Jun 07, 2016 | 1996 GMC Sierra

1 Answer

1997 gmc sierra fix the code po102


code po102 refers to mass air flow(MAF) sensor/volume air flow (VAF) sensor---low input======causes --wiring short to ground---MAF/VAF sensor ---ECM

Feb 22, 2015 | GMC Sierra Cars & Trucks

1 Answer

Gm trouble codes explained


code p0102 refers to mass air flow(MAF) sensor /volume air flow (VAF) sensor -low input. Causes ---wiring short to ground --MAF/VAF sensor ---ECM.

Apr 23, 2013 | GMC Cars & Trucks

1 Answer

Engine light code 44 1994 GMC Sierra Pickup HD 5.7l, 4wd.


look for a serious exhaust or intake leak. look for bad wires to the o2 sensor or map sensor. just for starters.

Jul 20, 2010 | 1994 GMC Sierra

1 Answer

IAT SENSOR


what do you mean by control? there is one wire normally pink or white with pink strip that is power 5 volts + black is ground and a reference voltage 5 volts ground is black or white so the other two colors would be the control wires going to the computer. However would need the first 8 numbers of the Vin to know for sure. you can also go to www.alldatadiy.com and purchase a subscription that will give you the exact information you need, they change color codes for wires from time to time and if you hook it up wrong you can destroy the computer so I suggest you purchase the subscription to be sure.

Mar 21, 2010 | 2004 GMC Sierra 2500

1 Answer

I got a p0113 code for the mass air flow sensor on a ford sport track 2001 4.0 litre. I replaced the part but my truck will not run with the sensor plugged in. I can start it with it unplugged but when I...


1. At the Mass Air Flow (MAF) sensor connector, backprobe the Gray (GY) wire at terminal #6 with the key on and the MAF sensor connected. Typical voltage will be about 2-3.5v depending on temperature.

2. If the voltage is above 4.5v (which is what the code P0113 indicates) check the voltage on the Gray/Red (GY/RD) wire at terminal #1 of the MAF sensor connector. The voltage on the GY/RD should be less than about 0.1v.

3. If the GY/RD wire shows less than 0.1v and the voltage on the GY wire is above 4.5v, inspect the connections at the MAF sensor connector. If OK, replace the MAF sensor for the open Intake Air Temperature (IAT) Sensor.

4. If the voltage on the GY/RD wire shows above 0.1v, locate and repair the high resistance between the MAF sensor and pin #91 of the Powertrain Control Module (PCM) connector.

5. If the voltage on the GY wire is not above 4.5v but the scanner shows -40 F on the data stream, check the voltage at pin 39 of the PCM. If the voltage at the PCM is above 4.5v, locate and repair the high resistance or open circuit in the GY wire between the PCM and MAF sensor connector

Nov 23, 2009 | 2001 Ford Explorer Sport Trac

1 Answer

2004 gmc sierra


P0102 is mass air flow sensor circuit, low input the MAF is attached to the air cleaner where the hose runs out of it... Unplug it and check the voltage supply and the ground... looking into the plug, with the tab facing up, there will be 3 connecters inside it, left to right they are.... sensor signal, ground and supply.... make sure you have 12 volts at your supply and the ground is good good luck

Feb 27, 2009 | 2004 GMC Sierra

1 Answer

Mass air sensor and intake air temperature sensor


They are not the same thing but the air temp sensor is made into the mass air sensor

Nov 20, 2008 | 2004 GMC Sierra 2500

1 Answer

2007 gmc sierra 2500 IAT sensor


Well, the IAT (Intake Air Temperature) sensor is located on the air intake duct between the filter and the throttle body (Assuming you have the 6L motor). The wires are easily visible at the plug that connects the sensor to the wiring harness. That's the easiest place to access them.

May 18, 2008 | 2004 GMC Sierra 2500

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