How do I fix code P0171?
How do I fix code P0171?
What repairs can fix the P0171 code?
- Replacing the fuel pump.
- Replacing the fuel filter.
- Replacing the fuel pressure regulator.
- Replacing the powertrain control module.
- Replacing one or more injectors.
- Replacing one or more oxygen sensors.
- Replacing the mass air flow sensor.
- Repairing a vacuum leak.
What does code P0171 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.
Can a bad o2 sensor cause P0171?
Additional Causes of Code P0171 A plugged Fuel Filter or poorly functioning Fuel Pump can set the P0171 code. The computer hears (accurately) from the Oxygen Sensor that the Fuel Mixture is too lean so the computer keeps increasing the amount of fuel being delivered into the combustion chambers.
Can a dirty air filter cause high idle?
It is just as important for your engine to get enough air, as it is for it to have enough fuel. A clogged filter will reduce the flow of air into the engine, causing a rough idle. It may also increase your fuel consumption.
Will a dirty air filter cause a check engine light?
A dirty air filter is one of the things that can cause your Check Engine light to come on, caused by an inadequate supply of air to the engine that results in a buildup of carbon deposits. Have your mechanic scan your vehicle to track down the source of the problem, as it could be as simple as replacing the air filter.
What happens if you don’t change air filter in car?
More than likely, your check engine light will turn on. While this rarely results in permanent damage, neglecting the air filter for long enough may cause the engine to stop running completely. Debris from the outside can build up over time and really wreak havoc on the combustion chamber.
Can a dirty air filter cause a P0101 code?
In vehicles with an oil-soaked aftermarket air filter, oil from the air filter can contaminate the MAF sensor element, causing the code P0101 or other MAF-related codes. In some Volvo cars, the code P0101 could be caused by a dirty throttle body or vacuum leaks in the PCV system (e.g. vacuum line to the oil separator).
Can I run my car with MAF unplugged?
Yes you can temporarily drive with the MAF sensor disconnected.
Can I use wd40 to clean MAF sensor?
DO NOT USE WD-40. Use a cleaner that is meant for electrical parts. Brake cleaner is essentially the same stuff. I’ve also used something called ‘thottle body cleaner’ whose label indicated it was safe for cleaning MAF’s.
What causes a MAF sensor to go bad?
Contamination is a key reason why MAF sensors fail and require replacement. As air, dirt and other debris get into the sensor, the parts become contaminated and fail. Drivers often notice sluggish performance, rough idling, poor acceleration or even stalling.
What happens when a mass airflow sensor goes bad?
A contaminated or failed mass air flow sensor cannot measure the amount of air flow correctly. This causes the engine computer to miscalculate the amount of injected fuel. As a result, a bad mass air flow sensor causes various driveability problems, including a no-start, stalling, lack of power and poor acceleration.
Can a mass air flow sensor mess up your transmission?
The Mass Airflow Sensor measures airflow into the engine intake assembly and is used to determine engine load. If it fails it can cause automatic transmission problems such as late harsh shifts, early soft shifts, or can result in no shifting at all.
Can a MAF sensor be cleaned?
We recommend that you clean the MAF sensor every time you change your air filter. Carefully remove the sensor from the air duct and disconnect the electrical connector. Spray 10 to 15 spurts of the mass air flower cleaner onto the wire or plate. Don’t scrub the parts; you may break the wire or damage the plate.