Question about 1998 Chevrolet K3500

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1998 Chevrolet 1 ton 4x4

I have a problem with my truck...... The mass air flow sensor is not reading anything. I have replaced it and hooked it to a machine that still shows a code P0102...... While the same computer was attached I clicked on the gauges to see what they were reading and the mass air flow sensor was not even registering a reading.... What can cuuse this??

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  • toby78611 Jun 02, 2010

    Thanks for the advice..... You helped a lot1111 That fixed some of the prob.


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Most likly you have an open short, a wire that has been broken. also make sure you don't have any corrosion on the plug this will cuase you to get no reading in the data stream. The only other thing i can think of is a bad PCM because you have nothing between teh 2 componants.
I would find the wire lead at the pcm and unplug it and do a continuity test on the wire to make sure its good.
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Posted on Jun 01, 2010

  • toby78611 Jun 01, 2010

    The guy that owned the truck cut the catalytic converter off and the O2 sensors...... Could that cause the problem??

  • Dave Martin Jun 01, 2010

    The cat isn't going to cuase too much problem but the O2 sensor will give you some problems, some people just think nothing of taking out a componant of the sensor system not thinking that oen will effect the other , I would strongly seguest you fins a way to install a new O2 sensor in the pipe, and you might still get an error code but atleast the rest of the system will be working proporly. they make a weld bung that you can drill a hole into the pipe and weld the bung on and it will allow you the thread the O2 sensor in.


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Possible causes - Faulty mass air flow sensor
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