lancas.blogg.se - Trailblazer mass air flow sensor problems

If the fuel pressure is not as high as it needs to be this atomization doesn’t happen properly and the optimal air/fuel mixture isn’t achieved.

Fuel Pump/Fuel Filter– Today’s modern fuel injected motors need a lot of fuel pressure to atomize the gas properly.

Bad Fuel Injectors– If you have one or more fuel injectors that have gone bad that can certainly cause the air/fuel mixture to go bad.

If it has gone bad, the air fuel mixture will be off and the P0171 code will show.

Mass Air Flow Sensor– The mass air flow sensor calculates the volume of air entering the engine.

This will cause the Trailblazer to run rich.

The computer will still adjust the air/fuel mixture to compensate. When the oxygen sensor is bad, it can cause a false reading and trigger the code. Oxygen Sensor– The P0171 codes is thrown when the oxygen sensor(s) do not register enough oxygen in the exhaust.Here’s a great YouTube video on how to find a vacuum leak. Take a look around and see if you can find the vacuum leak. Vacuum Leaks– With the Chevy Trailblazer, one of the most common cause for the P0171 code to show is a vacuum leak.There are many things that can cause the P0171 trouble code on the Chevy Trailblazer. Idle Issues– With the air/fuel mixture altered, the vehicle can idle erratically as the computer compensates to keep the engine running.Misfire– If the air fuel mixture has gotten too far from factory specs, this can cause the Trailblazer to misfire.Mileage- may or may not suffer depending on how much the air fuel mixture has changed.Here are the typical symptoms that something is wrong when you have code P0171. For most people the first sign that anything is wrong at all is the service engine soon light coming on. There aren’t usually any drivability issues associated with P0171. Typically the code will be triggered by a lean condition in the engine.

The P0171 code on a Chevy Trailblazer will often be thrown if the fuel injection system is not operating properly. It also throws the code P0171 to let you know that it has done this. The vehicles ECM will add more fuel to the mixture in order to bring the air fuel mixture where it needs to be for optimal combustion. This is commonly referred to as a “lean” condition. The code is thrown when the oxygen sensors detect that there’s not enough oxygen in the exhaust system. Here’s a great YouTube video on finding out what is causing the P0171 code to be thrown on your Trailblazer.

This code number references a number that is given to you when you plug your car into a OBDII scanner. One of the most common trouble codes with the Chevy Trailblazer is the P0171 code.