It runs better with the mass air flow sensor unplugged when it is plugged in it would not accelerate sounds like it is choking
Hi there:
This code is set when the MAF (Mass Air Flow) meter is not sending the PCM the correct information. This can be due to a bad conection of the rubber intake hose between the MAF and the Throttle plate opening, a dirty air filter, a dirty mass air flow or a bad mass air flow.
Most programmer have you tie into the iat sensor in the mass air flow. this can cause the the iat sensor oto short out.
Hope helps.
SOURCE: have two codes on 1999 chevy blazer
p0404 is egr flow range, remove and clean egr passage way, it maybe built up with carbon, p0101 remove and clean mass air flow sensor. you can buy the cleaner at any auto parts store. but be carefull of the inside of sensor, follow directions on can. this should help a lot!!
SOURCE: service engine light on 2001 blazer
with the p0101 make sure you have a clean air filter. it can be bad spark plugs and or wires, or a leak in the air intake system
SOURCE: 2002 chevy blazer 6 cyl, 4.3 engine, emissions
P0101 is the Mass Air Flow Sensor error,
http://www.obd-codes.com/p0101
P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature
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