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P0171 CHEVY TRAX HOW TO
P0171 CHEVY TRAX CODE
P0171 CHEVY TRAX PROFESSIONAL

Fuel rail: Check the fuel rail’s pressure.Low Fuel Rail Pressure and Plugged or Blocked Fuel Injectors, Filters, or Pump You can also inspect your exhaust parts for leaks, such as the exhaust manifold, gasket, and flex pipe.

If the graph drops or spikes in revolutions per minute while you spray, look closely for a leak where you’re spraying at the time of that change.

P0171 CHEVY TRAX CODE

Graph your engine speed: If you have a scan tool or code reader that can graph engine speed, you can watch the reader while you spray carburetor cleaner on the intake gasket or surrounding area.Have someone watch the gauges for you while you spray: If the gauges fluctuate, that’s another indicator that should help you find the leak.The engine will either run smoother or rougher and can help you figure out where a leak is located. While the engine is running, spray carburetor or throttle body cleaner around the areas where you think there’s a leak.You can also check for a bad seal on the purge valve. Purge valve seal: If your engine is sounding rough, there could be a large leak causing the P0171 code.

P0171 CHEVY TRAX PROFESSIONAL

After trying to find these types of issues on your own, you could take your car to a professional mechanic for further inspection.

Gaskets: Check the gaskets in between the plenum and gasket heads for leaks and cracks.

Make sure everything in the engine intake system is sealed and connected, and check for leaks. More Complex Problems to Check for: Unsealed, Disconnected, or Damaged Engine Intake Parts While you’re looking in this area, you can also check for any debris that may have gotten in past the air filter and needs to be cleaned out. If you find any holes, you’ll need to replace the air filter.

Air filter: Look for any holes or debris.

You may even find a leaf that got through and is blocking the mass air flow sensor.

Mass air flow sensor: Check for any debris.

Dirty, Faulty, or Damaged Mass Air Flow Sensor or Air Filter The code’s cause could be something as small as a pinhole in one of the lines, so you want to be thorough when trying to diagnose code P0171.Ģ. Hear anything? Start looking in the area where you’re hearing noises for a leak, open port, or loose hose.

Whistling Noises While Your Car Is Running: Start your engine and listen carefully for a whistling or rushing air sound while you stay away from any moving components under the hood.

Underneath the Engine Cover: Look for anything that looks disconnected or any open ports that seem like they’re missing a hose.

If the snorkel appears to be okay, you can also check this area for any other disconnections. Grab and shake it so you can feel if anything is loose.

Air Intake Hose: Find the air intake hose that connects to the engine.

P0171 Causes to Look for and Diagnose First: Tools needed for diagnosing advanced P0171 code causes:

P0171 CHEVY TRAX HOW TO

Save on Quality Auto Parts and Get Free Shipping Code P0171 Causes and How to Diagnose ThemĬode P0171 causes can range from easier-to-find issues to more complex problems and can vary among vehicles. How Serious Is a P0171 Code? Is It Okay to Drive with?Ī lean fuel trim code like P0171 causes performance problems that can lead to costly damage, so it’s best to avoid driving with it. These problems can include bad fuel economy, poor engine performance, and even internal engine damage. If there is too much air, the ECM or PCM overcompensates with larger fuel injections, which triggers the P0171 code. With the help of oxygen sensors, your car’s engine or powertrain control module (ECM or PCM) is responsible for measuring the air-fuel mixture and adjusts the amount of fuel depending on the amount of air. What is that correct ratio? To function optimally, an engine needs a mixture of 14.7 parts air to 1 part fuel (14.7:1). If that air-fuel ratio is out of balance, you’ll either notice that something is off, or your car’s computer will detect it first. This mixture ratio is pretty precise, so if it’s off even by a small amount, you could experience the symptoms caused under a P0171 engine code.

Bank 1 is where cylinder number 1 is located, and where you’ll find the cause of the code.įor your car to run the way you would expect it to, its engine needs a certain amount of air and a certain amount of fuel. This can be caused by something like a disconnected hose or vacuum leak, which means there’s more air than usual, or because your fuel system is weak. P0171 is a common trouble code in many vehicles.Ī “bank,” as in “bank 1,” refers to the side of the engine where each of your car’s cylinders is found.

“Code P0171 – system too lean bank 1” means there is too much oxygen or too little fuel in the exhaust, which is referred to as a “lean” condition, or a lean or “low fuel trim” code.