What is P0473 fault code? Exhaust Pressure Sensor Low Inlet Misfunction: What can be the reason? How can I fix P0473 fault code What are the causes and symptoms of the P0473 error code?
What is the P0473 Fault code? What does it all mean?
If the powertrain controller module (PCM), detects that voltage signal from exhaust pressure sensor is higher than manufacturer-programmed parameters, P0473 will trigger. This is often due to an electric fault. The P0471 fault codes can also be found with this code.
Induction is when compressed air is delivered to the intake of an internal combustion motor. These engines are equipped with a compressor which compresses air to increase pressure, temperature, density and volume. In order to increase the volume of the air that is sent to an engine, the fuel required to run it is also increased. Conclusion; When a small displacement engine needs extra power and the turbocharger/supercharger kicks in, it will have the same power output as a large displacement engine.
The powertrain control module, or PCM, uses a variety of actuators and sensors to fine-tune turbocharger systems. This improves power output and fuel economy. The exhaust pressure sensor (EPS) is one of these sensors. It plays an important role in turbo, EGR (Exhaust Gas Recirculation), and emissions. All of these systems will function properly if the exhaust pressure sensor provides accurate and reliable data.
Turbo diesel engines usually have an exhaust pressure sensor. It is responsible for measuring the back pressure in the exhaust system, and reporting it to the PCM. Particularly in diesel applications, the exhaust back pressure is directly proportional to the amount particulate matter (soot), retained at the DPF (Diesel Particulate Film).
Excessive buildup of soot in the DPF can cause the exhaust system to clog and prevent the flow exhaust gases. The PCM uses the exhaust backpressure to determine how clogged the DPF. The PCM uses input data from sensors to determine if the DPF has become clogged. If it does, the PCM injects a chemical fuel or chemical into exhaust system. This raises the exhaust gas temperature, and starts a process called “The Process of Clogging”. “regeneration” Burn the soot out of the exhaust.
In some cases, the input data from the exhaustpressure sensor can be used to control the operation of EGR and turbocharger boost. The exhaust pressure between the turbocharger’s turbocharger and cylinders is continuously monitored. This sensor is used by the PCM to monitor turbocharger function and control the wastegate.
The PCM compares voltage signals from the exhaust backpressure sensor and the ambient air pressure. The PCM sets fault code P0473 if it finds that the voltage signal from a sensor is not consistent with other sensors or is excessively high (above 4.75V).
P0473 fault codes can be found on vehicles of all makes and models, including but not limited to: Nissan, Audi, Ford Citroen Kia, Hyundai Renault, Peugeot, Mercedes-Benz, Peugeot, Citroen, Ford, Citroen, Ford, Citroen, Kia and Kia.
What is the P0473 Fault Code?
Fault code P0473 can be triggered by the following common causes:
- – Defective exhaust pressure sensors
- – Sensors that are damaged, frayed, or fused wires, or loose, rusty connectors. This can cause the sensor to fail.
- – Short to ground between PCM and exhaust pressure sensor
- – Blockage of the exhaust back pressure tube
- – Blocked pipe from exhaust manifold to pressure sensor
- – Leakage of air in the EVAP (exhaust gas recirculation) system
- – A PCM that is not working or requires a software upgrade
What are the symptoms of P0473 Fault code?
You may experience the following symptoms if your vehicle has the code P0473:
- – Illumination for the check engine light
- – Low engine performance
- – Failing the turbocharger system
- – Increased fuel consumption
- – It is possible to adjust fault codes that relate to the turbocharger and exhaust systems
- – Unable to perform the regeneration process manually
- – The computer will not turn on unless it can be regenerated.
How to Fix the P0473 Fault Code
The EGR valve is typically located next to the exhaust backpressure pipe. When diagnosing fault code P0473, the most common error is to confuse the fault with EGR valve. Both of these faults are totally different.
The following repairs may be able to resolve the P0473 fault codes:
- – Test and, if needed, replace the exhaust pressure sensor
- Repair/replacement of the damaged wires and connectors that lead to a short or open circuit in the sensor
- – Inspection of the ground cable from the PCM and repair of any damaged cables
- – Clean the exhaust system of clogged pipes
- – Repair of parts that leak exhaust or air.
- – Reprogramming or replacement of a faulty PCM
- Locate the exhaust pressure sensors, and then disconnect the pipe that connects the sensor and the intake tube. Verify that there is no carbon buildup. Look for water coming out of your code.
- Cables and connectors should be checked for any burnt areas or rubbing against any other components. You should also inspect the connector terminals to ensure they are free from corrosion. Replace these components if there is a problem.
- Ensure the turbocharger’s pipe isn’t leaking. If you find any bad links, make adjustments and then delete your code.
- If the code does not return, you should test the sensor’s circuitry. Disconnect the wires from the exhaust pressure sensor. Then, use a DVOM (Digital Volt Ohm Meter) to check the power circuit for 5 volts. If the sensor’s output voltage is 12 volts, replace the wires connecting to it with a DVOM (Digital Volt-Ohm Meter).
- – If none of these options work, replace your exhaust pressure sensor.
What is the P0473 Fault Code?
The engine may not be performing as it should if you continue to drive the vehicle bearing the P0473 fault codes. Rarely, the engine might run perfectly and not show any symptoms. You could end up stranded on a roadside due to your vehicle not starting.
