How do I fix code P0471?
How do I fix code P0471?
A good starting point for resolving a P0471 code is to disconnect the tube that connects the pressure sensor to the exhaust manifold. Inspect the tube for any blockages. You may need to blow through the tube to see if air can pass easily through.
What does diagnostic code P0471 mean?
If the P0471 code appears, it means that the powertrain control module has detected that there is a voltage reading from the exhaust system back pressure sensor circuit that is out of the normal range. This is generally monitored in turbocharged vehicles, and those vehicles that have diesel engines.
Where is the exhaust pressure sensor located?
The exhaust pressure sensor is present in the exhaust manifold outlet of the exhaust system.
How do you check exhaust pressure sensor?
Using a pressure gauge, measure the pressure of both hoses. For sufficient accuracy, use an exhaust back pressure gauge that measures 0-15 PSI. Check the signal voltage again. The voltage should read a number between the pressure values of the hoses.
What is an exhaust pressure sensor?
The Exhaust Gas Pressure Sensor is a Differential Sensor measuring the pressure difference between gas in the intake and the outtake of the Particulate Filter. This sensor is another element in the pollution regulation systems for Diesel engines imposed by European emissions regulation.
What does Engine code P0171 mean?
The P0171 OBD-II 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.
How do you change an exhaust pressure sensor?
Starts here2:52Exhaust Gas Pressure Sensor – FAE Fitting Instructions – YouTubeYouTube
What causes back pressure in exhaust?
Engine exhaust back pressure is defined as the exhaust gas pressure that is produced by the engine to overcome the hydraulic resistance of the exhaust system in order to discharge the gases into the atmosphere.
Can lack of back pressure damage an engine?
Abstract: Exhaust system components such as mufflers and exhaust aftertreatment devices are a source of engine exhaust back pressure. Increased back pressure levels can cause increased emissions, increased fuel consumption, and can negatively affect engine performance.
How do you change a exhaust pressure sensor?
Is it OK to drive with P0171 code?
It is okay to drive a vehicle with P0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage.
How do I fix trouble 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.
