What is the P0471 fault code What is the Exhaust pressure sensor range / performance malfunction? How can I fix P0471 fault code What are the causes and symptoms of the P0471 error code?
What is the P0471 Fault code? What does it all mean?
A P0471 Code is a code that means “Exhaust Pressure Sensor Range/Performance” . This code is typically used on turbochargers or diesel engines. The exhaust pressure sensor measures the exhaust pressure and reports it to the PCM. The PCM is able to control the exhaust backpressure controller as required. The powertrain control module, or PCM, compares the voltage signal from exhaust pressure sensor with the intake pressure or ambient pressure. If the PCM detects an error in the operation of the exhaustpressure sensor, or a signal that is outside the normal range of values, code P0471 can be set. This can be caused by mechanical or electrical problems.
P0471 fault code can affect vehicles of all makes and models.
What causes the P0471 Fault code?
Here are some reasons why P0471 should be set.
- – Defective exhaust Pressure Sensor
- – Fused, damaged, or frayed wires to the sensor. Loose and rusty connectors. Open or short circuit problems.
- – Interruption between the PCM and the exhaust pressure sensor signal due to an open circuit
- – Clogged or restricted pipes from the exhaust manifold to the pressure sensor
- – Leakage of air in the EVAP (Evaporative Emission Control System).
- – A PCM that is not working or requires a software upgrade
What are the symptoms of P0471 Malfunction code?
You may experience the following symptoms if your vehicle has the code P0471:
- – Illumination at the check engine lights
- Low engine performance
- – It is possible to adjust fault codes related to turbocharger and exhaust systems
- – Unable to perform the regeneration process manually
- – Do not turn on unless you can do a regeneration.
How to Fix the P0471 Fault Code
This code is often confused and misdiagnosed with the exhaust gases recirculation fault code. The exhaust backpressure pipe is located close to the EGR valve. However, P0471’s diagnostic and repair procedures are different.
There are several repairs that can resolve the P0471 fault code.
- Locate the exhaust pressure sensor. Then disconnect the pipe connecting the sensor to the intake manifold. Inspect the exhaust pressure sensor for any carbon buildup. Look for water coming out of your code.
- You should inspect cables and connectors for burnt spots, rubbing against other parts, or if they are too long. You should also inspect the connector terminals to ensure they are free from corrosion. These components should be replaced if they are damaged.
- Ensure that the turbocharger’s pipe isn’t leaking. You can correct any broken links and then delete the code.
- – If the code does not return, check the circuits and the sensor. Disconnect the wires from the exhaust pressure sensor. Then, use a DVOM (Digital Volt Ohm Meter) to check the power circuit for 5 volts. Repair the wiring connecting the PCM and sensor if the sensor is reading 12 volts.
- – If none of these options work, replace your exhaust pressure sensor.
How Serious Is the P0471 Fault Code
While the P0471 fault code does not indicate anything serious, it should be addressed as soon as possible. Engine performance could decrease when this code has been set. This code can lead to more serious problems. Other fault codes will need to be set if the code is delayed. Worst case scenario, you could be stranded due to the vehicle’s inability to start.
