Question about 2002 Chevrolet Blazer

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2002 chevy blazer 6 cyl, 4.3 engine, emissions inspection turned up two codes: P0101 and P0128. Runs fine, cleaned maf sensor and changed air filter, still getting codes. Are they related and tied into the same source problem?

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P0101 is the Mass Air Flow Sensor error,
http://www.obd-codes.com/p0101


P0128 Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature

Posted on Apr 13, 2011

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My chevy blazer 2000 ha a p0101 code changed the mass air flow sensor still does not want to accelerate


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.

Jun 20, 2012 | 1998 Chevrolet S-10 Pickup

4 Answers

P0101 code for check engine light.. possible solutions???


Diagnostic Test Code (DTC) P0101 has a generic description of "Mass or volume air flow circuit range/performance problem". This can be caused by several things including:
> Dirty air filter
> Air leak in air intake system
> Contaminated, deterriorated or damaged Mass Air Flow Sensor
> Poor electrical connections at the Engine Control Module, the Mass Air Flow (MAF) sensor or the Throttle Position Sensor (TPS)
> Faulty MAF or TPS

You should check your air filter and air intake system visually and correct any obvious defects/leaks first.

If a visual inspection does not turn up the cause, then you will need a scan tool capable of reading sensor data to verify the function of the MAF and TPS. You will also need proper electrical diagnostic equipment to verify the integrity of the circuits and continue with diagnosis.

Sep 11, 2011 | 2005 Kia Rio

1 Answer

These show up on computer p0101 maf sensor p0128 thermostat p0155 02s heater circuit im not getting power i need to now all the problems & solutions i have 85700 miles 2002 chevy blazer is this...


Ok, it's not the transmission.
P0101 maf sensor ( mass air flow) sensor. Change the sensor, it is located in the air intake hose that runs from the air filter housing to the throttle plate/ throttle body. Disconnect the wire from it and loosen clamps ( if equipped) and pull hose from it.
P0128 thermostat is below temperature specs, change to a 190 or 195 degree thermostat. auto parts store should be able to tell you which one you need.
P0155 the heater circuit in the oxygen sensor is bad, need new one. That is on bank 2 sensor #1. If it is a V6, looking at the engine, it would be on passenger side, screwed into the exhaust pipe near the exhaust manfold.

Sep 22, 2010 | 2002 Chevrolet Blazer

1 Answer

2002 chevy blazer codes 443 449 i replaced the maf sensor the vaf sensor on air horn the emmision valve on the engine the vent valve to even tried the gas cap clear codes drove the truck guess what codes...


p0443 is evaporative emission control system, purge control curcuit malfunction, p0449 is emission control system, vent control curcuit malfunction. p0449 is often a filler cap problem on fuel tank. try tightening cap

May 20, 2010 | 2002 Chevrolet Blazer

1 Answer

Failed emissions test for codes P0101 and P0128


P0101 code is the Mass Air Flow (MAF) sensor error . The book that I have does not show P0128 code, sorry i couldn't help further....

Mar 23, 2010 | 2001 Oldsmobile Alero

1 Answer

I have serv eng light on with code # PO172 , PO128 , and PO442 , and I replaced fuel tank cap today , light still on ,and I need to get inspection , but I am out of work and can't afford expensive repair...


Code p0172 is MAF, vacuum leak, and fuel pressure.
You can see my TIPS on this site to help with the MAF.
Code p0128 is Low ccolant, ECT or the IAT.
code p0442 is your EVAP system.
Please let me know what you find.

Feb 12, 2010 | 2003 Chevrolet TrailBlazer

2 Answers

2002 chevy blazer 4.3l 4x4. Just changed out mass airflow sensor 2 weeks ago as the service engine soon light was coming on and had code p0101. Cleared code out, but i am still waiting for the evap sensor...


you can get faulty mass air flow meters.Make sure you perchaced the original from your dealers.There are a lote of copy types and they are not calabrated to your vehicle.Most copys are not calabrated.

Jul 24, 2009 | 2002 Chevrolet Blazer

1 Answer

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

Jul 13, 2009 | 2000 Chevrolet Blazer

2 Answers

Hard starting.. check engine on P0101


Replace the filter but don't try and clean the MAF sensor,Just replace it.

May 09, 2009 | Nissan Maxima Cars & Trucks

2 Answers

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!!

Feb 24, 2009 | 1999 Chevrolet Blazer

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