2003 Chevy Silverado check engine light?????

2003 CHEVROLET SILVERADO
60,000 MILES • V8 • 4WD • AUTOMATIC
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CATREASM
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Sometimes when I'm pulling my 2 horse trailer with horses in it. My check engine light will come on. My temp. gauge and oil gauges look good. When I unhook the trailer it will go off and be fine. This has happend 2 times now. What does this mean?????
Jun 18, 2008 at 1:31 PM
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MERLIN2021
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First thing you need to do is have the codes read, Autozone does it free, Post the results with the code number(s). Even if the service engine light is not on, there should be freeze frame data stored.
If it won't make it to Autozone, buy a cheap scanner, they can be had for 30-40 dollars, a good investment, since they cover all cars sold in the USA from 96 on...
If the light is blinking, it means possible damage to the converter...service it right away!
Apr 14, 2021 at 6:48 PM
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CATREASM
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The light is not blinking. The code is P0101 mass or volume air flow. What does this mean? Thanks
Apr 14, 2021 at 6:48 PM
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RHALL77
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check your air filter and maf sensor for blockage of dirt, leaves, ect. You may have to replace the sensor.
Apr 14, 2021 at 6:48 PM
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CATREASM
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Thank you so much. you guys are awsome.
Apr 14, 2021 at 6:48 PM
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MERLIN2021
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Glad we could help.
Apr 14, 2021 at 6:48 PM
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