Can bad gas cause a P0171 code?

A leak that causes diagnostic trouble code P0171 could be anywhere around the engine intake, including the PCV hoses, vacuum hoses, and the intake manifold gasket. A weak or failing fuel pump won’t push enough gasoline to the engine. Clogged fuel injectors or a dirty fuel filter will cause a similar backup.

What does it mean when your car says p0171?

Since the error code p0171 means the presence of a lean mixture in a vehicle, various sensors may cause the code. In order to diagnose this code, do the following: This is part of the troubleshooting process, with which you turn on ignition while not wanting to achieve low voltage.

What causes a p0171 fuel trim system Lean Bank 1?

If the problem persists the front oxygen (O2) sensor may need to be replaced. The P0171 code could also be caused may be caused by one or more of the following: debris on MAF sensor causing an incorrect reading, improper oil level, low or high fuel pressure or Engine Control Temperature (ECT) Sensor reading inaccurate.

What causes the p0171 code on the MAF sensor?

The P0171 code could also be caused may be caused by one or more of the following: debris on MAF sensor causing an incorrect reading, improper oil level, low or high fuel pressure or Engine Control Temperature (ECT) Sensor reading inaccurate. There is a factory service bulletin for the following Chevrolet models: 2000 Chevrolet S-10

Can a timing chain cause a p0171 lean?

Engines with timing chains will usually not jump time. Import vehicles (including some American vehicles) with timing belts are much more likely to jump time for various reasons which can possible trick the computer and cause the P0171 lean code.

What causes a p0171 code?

Causes of the P0171 code may include: A faulty fuel pressure regulator. A weak fuel pump. A clogged fuel filter. A faulty powertrain control module. A vacuum leak. Faulty injector(s)

What does p0171 code mean?

The P0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. A lean condition occurs when the engine either receives too little fuel or too much air.

What does code p0171 mean?

P0171 is a diagnostic trouble code (DTC) for “System Too Lean (Bank 1)”.