Question about 2006 Chevrolet Colorado

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Check engine light came on and a code of 101. i teied replaceinf the MAF but it made it worse. Do you know what is wrong.

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You need to study auto technology

Codes do not tell you what is wrong or what to replace.

You need a set of Factory Service Manuals and Emissions Diagnosis Manuals ( if your going to work on todays vehicles, like your own,in your driveway. It can be done, but will require a lifetime of study to learn the technology. You also can spend hundreds of dollars on tools, just to get at one bolt that is hard to see or reach.

Replacing a MAF Sensor with the correct part does not make things worse, common sense.

The codes you get are the symptoms,not always the area of the problem. You need an understanding of the system your working on,and even then if you don't have a head for logic,you end up throwing parts and money at it.

Posted on Jul 31, 2010


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I have a '11 Toyota Camry LE, the VSC, and engine light are on. I have these codes from the local auto parts shop: C1201, P0171, and P0101.

code p 101 refers to mass air flow(MAF)sensor/volume air flow(VAF) sensor --range performance problem====causes --intake leak/blockage---MAF/VAF sensor

code p 0171 refers to system to lean bank 1===causes ---intake /exhaust leak---AIR system---MAF/VAF sensor ---fuel pressure/pump---injector/s---HO2S ( heated oxygen sensor --the one in the exhaust manifold before the cat converter bank 1)

I don't have a listing for the c code but from the other 2 codes I would be checking around the maf/vaf sensors and the HO2S sensor (replace)
start with checking the wiring and connections to both units

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I have an 03 Silverado V6 automatic. I am having a bad misfire. Codes that come up are p0101 and p0304. I replaced the cap, rotor, and all 6 plugs and wires last week. Nothing has changed. If anything, it...

P101 thats incorrect flow from the maf 304 that cylinder 4 misfire had troble this moorning with a code 101 no power 80 km top the catalytic convertor was block cchange it run great now dont forget your 304 code is misfire thats mean the gas that goes in that cylinder doesnt burn it goes in the catalytic converter and it make the converter red hot to melting point let me no brian p.s the 101 code i had this moorning was on a gmc safari with 4.3 liter good luck

Mar 18, 2015 | Cars & Trucks

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yes it can but you will know if the maf is not doing its job take to a parts store and have them read the codes they should do this for free

May 26, 2014 | 2005 Ford Ranger

1 Answer

Check engine light code says MAF sensor

Could be wiring to the MAF. Did you replace it with a new one? I know that might seem silly but people do put used ones on.

If you need further help, reach me via phone at

Jan 14, 2014 | 1998 Oldsmobile Regency

1 Answer

My check engine light is on

possible the fuel regulator valve at the end of the fuel manifold is not holding sufficient pressure. have a pressure check done to eliminate that problem check that one of the codes is not for faulty injectors

Jan 23, 2013 | 2005 Mazda 3

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Mass air flow sensor on a 1999 has been replaced but is still coming up with code 101.

You may, or may not be aware of this, so let me mention it. Fault codes are not part specific, they just reduce the field for trouble shooting. Code 101 sounds like it may recognise a problem with the emission system. I would try the following;

1. Make sure you have a clean air filter. Engines need a proper fuel/air mix ratio, a dirty filter prevents the engine from getting the air it needs.

2. MAF, you already did the mass air flow sensor, but, make certain that all of the hoses and vacuum lines were properly reconnected.

3. Oxygen sensor. If this part is faulty, it will have a number of similar effects as the MAF. You do have 1 in front, ( before the catalytic converter ), and 1 in the back, ( behind the catalytic converter)
I would have both of these checked.

I hope this helps you.

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1 Answer

1999 toyota tacoma 2.7L check engine light came on and showed a code for a bad tps. I replaced the tp[s and the truck runs worse.

Sounds like a mass air flow sensor. Sometimes when the TPS is out the MAF throws a code, and Sometimes when the MAF is out the TPS throws a code. They correspond with eachother and its tricky to tell. What kind of problems are you having?

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Check engine light is on car is running bad what could the problem be?

Take the car to an autoparts store and have them use a scan tool to retrieive any fault code(s) that are stored in the computer. Most parts stores offer this service for free. Getting the code or codes will narrow down the problem or potential problem. Hope this helps and best wishes.

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