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P0473 fault-error code EXHAUST PRESSURE SENSOR DETECTED HIGH PRESSURE

Updated: Nov 11

What is P0473 Fault-Error Code?

 

Fault/error code P0473 indicates a problem with the pressure sensor located in the vehicle's exhaust system. This code indicates an error condition detected by the vehicle's engine control module (ECM). Specifically, code P0473 “EXHAUST PRESSURE SENSOR HIGH” indicates that a high pressure has been detected in the exhaust pressure sensor.

 



The exhaust pressure sensor is a sensor that measures the pressure in the vehicle's exhaust system. This sensor monitors the pressure in the exhaust gases and transmits this information to the vehicle's engine control unit. This information is used by the engine control unit to optimize the operation of exhaust gas regulation and other systems.



P0473

 

Code P0473 usually occurs when there is a malfunction or problem with the exhaust pressure sensor. If the sensor detects a high pressure, it is usually a sign of a problem or malfunction with the exhaust system. This may occur as a result of a blockage or damage to exhaust system components such as the exhaust gas filter (DPF) or exhaust recirculation valve.

 

When the exhaust pressure sensor detects high pressure, the vehicle will often turn on the check engine light and the driver may notice a change in the vehicle's normal operation or hear sounds from the vehicle.

 



What are the symptoms of P0473 Fault/Error Code?

 

Symptoms of the P0473 malfunction/error code may include:

 

Check Engine Light: The most common symptom is the Check Engine light on the vehicle's dashboard. The fault light indicates an error condition detected by the vehicle's engine control unit.

 

Performance Problems: A malfunction in the exhaust pressure sensor can adversely affect the performance of the vehicle. Performance problems such as engine power loss, acceleration problems or irregular operation may occur.

 

Fuel Economy Reduction: A problem with the exhaust pressure sensor can affect the vehicle's fuel efficiency. Fuel economy may be reduced due to the engine using the wrong fuel-air mixture or exhaust gas regulation being affected.

 



Abnormal Exhaust Noises: When there is a pressure problem in the exhaust system, abnormal noises may be heard from the exhaust. These noises are usually caused by blockages or pressure problems.

 

Engine Tremors or Tremors: Exhaust pressure sensor malfunctions can cause engine shivers or a shuddering sensation. This can often indicate unstable engine operation or combustion problems.

 

What could be the causes of P0473 Fault/Error Code?

 

Possible causes of malfunction/error code P0473:

 

Exhaust Pressure Sensor Malfunction: This code usually occurs when there is a problem with the exhaust pressure sensor. The sensor may be faulty, dirty or damaged. If the sensor is not working properly, it will prevent the vehicle from properly monitoring exhaust pressure.

 

Electrical Connection Problems: There may be a problem with the electrical connections in the exhaust pressure sensor circuit. Cable connections may be loose, corrosion may have occurred, or cables may be damaged. Such connection problems can affect the sensor's signal transmission.




 

Exhaust System Problems: A problem with the exhaust system components. A blockage or damage to the exhaust gas filter (DPF), exhaust recirculation valve, or exhaust pipe can cause increased exhaust pressure.

 

Engine Control Module (ECM) Problems: In rare cases, there may be a problem with the vehicle's engine control module (ECM). The ECM processes data from the exhaust pressure sensor and controls exhaust gas regulation.

 



Physical Damages: Physical damages that may occur in the vehicle, such as cable cuts or broken sensors. Such physical damage may prevent the sensor from functioning properly.

 

What Steps Should Be Followed to Resolve the P0473 Fault/Error Code?

 

The following steps can be followed to solve the P0473 fault/error code:

 

Checking the Exhaust Pressure Sensor: As a first step, the exhaust pressure sensor should be checked. The physical condition of the sensor, its connections and cables should be reviewed. If there is any damage, contamination or wear, the sensor must be replaced.

 



Checking Electrical Connections: Electrical connections in the exhaust pressure sensor circuit should be checked. It is important that the cable connections are not loose, dirty or damaged. If necessary, connections should be cleaned and restructured.

 

Exhaust System Check: The exhaust system of the vehicle should be checked. The exhaust gas filter (DPF), exhaust recirculation valve, or exhaust pipe should be inspected for blockage or damage. If any problems are detected, repair or replacement of relevant components may be required.

 



Checking the Engine Control Module (ECM): In rare cases, there may be a problem with the vehicle's engine control module (ECM). The ECM processes data from the exhaust pressure sensor and controls exhaust gas regulation. A problem with the ECM can cause the code to appear. In this case, the ECM may need to be checked or replaced as necessary.

 

Test Drive: The vehicle should be taken for a test drive. This is important to verify whether the problem is resolved and the vehicle operates normally. If the malfunction lamp does not come on and the vehicle operates normally, you can be sure that the problem has been solved successfully.

 



What are the Long-Term Effects of the P0473 Fault/Error Code?

 

Long-term effects of fault/error code P0473 may include:

 

Performance Problems: A malfunction in the exhaust pressure sensor can negatively affect the performance of the vehicle. If the sensor is not working properly, it may cause the engine to use the wrong fuel-air mixture or affect exhaust gas regulation. This can lead to performance problems such as reduced engine power, acceleration problems or erratic operation.

 

Fuel Economy Reduction: A problem with the exhaust pressure sensor can affect the vehicle's fuel economy. If the engine uses the wrong fuel-air mixture or the exhaust gas regulation is affected, this may cause an increase in fuel consumption.

 

Increased Emissions: Exhaust pressure sensor malfunction can increase the vehicle's exhaust gas emissions. If the sensor is not functioning properly, it can affect exhaust gas regulation and increase the vehicle's emissions levels.

 



Long-Term Damage: A malfunction in the exhaust pressure sensor can lead to larger and more expensive problems over time. For example, engine damage due to incorrect fuel-air mixture or other components in the exhaust system being affected.

 

Safety Risks: Exhaust pressure sensor malfunction can also affect the safety of the vehicle. Erratic engine operation or performance problems can negatively impact the driving experience and pose a safety risk.

 

Fault/error code P0473 should be taken seriously and resolved as soon as possible. In the long term, it can have negative effects on the vehicle's performance, fuel economy, emissions and safety. If any symptoms of this problem are noticed, it is important to take the vehicle to an auto repair shop and have the problem resolved.



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