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.
How do I fix code P0472?
What repairs can fix the P0472 code?
- Replacing any damaged wires in the EPS and/or cleaning them.
- If the connectors were the problem, then erasing the code from memory should result in a clear screen as opposed to the code returning.
- If the code returns, testing the sensor and its circuits.
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 back pressure exhaust?
Definition. 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?
In addition to a lack of high speed power, poor fuel economy, and overheating, too much backpressure can also cause damage to the engine. A blocked exhaust can cause the engine to start and idle fine for a few minutes, but then die as backpressure builds up and chokes it out.
How do I check my exhaust back pressure?
How to Measure Exhaust Backpressure. You can also check backpressure by removing an oxygen sensor from the exhaust manifold, and connecting a hose fitting to your pressure gauge. If the O2 sensor is fairly easy to reach and the vehicle is fairly new, it should come out without too much effort.