What is the P0453 faultcode? Evaporative Emission Control System Pressure Sensor High Inlet failure description? How do you fix the P0453 fault code What are the symptoms and causes for the P0453 fault code
What is the P0453 Fault code? What does it all mean?
The EVAP (Evaporative Emission Control System) ensures that fuel tank vapors do not escape into the atmosphere. Modern EVAP systems come with a self testing monitor. This monitor shuts down the system and then checks for leaks. The monitor performs a pressure test to determine if there is any leakage in the system. To check for leaks, it uses the fuel tank pressure sensor (FTP).
Usually the FTP sensor, also known as the EVAP sensor, is found on or inside the fuel tanks. It measures the pressure, and thus the vacuum within the tank.
The powertrain control unit (PCM/ECM), checks the EVAP for any leaks, and also checks its ability to inject fuel vapor in the engine. The PCM will keep code P0453 in memory if the FTP sensors sends a voltage signal higher than usual (above 4.55 volts) for any length of time.
What causes the P0453 Fault code?
FTP sensors can send high voltage signals for many reasons. The most common are:
- – Defective FTP sensor
- FTP sensor circuit problems
- – Clogged EVAP drain hoses
- An overfilled fuel tank can lead to abnormally high pressure in your fuel tank
- – Defective PCM / ECM
What are the symptoms for the P0453 fault code?
- – Illumination for check engine lights
- – Raw fuel smell
How to Fix the P0453 Fault Code
- An ohmmeter should be used to measure the FTP sensor circuit. The voltage signal should not exceed 2.5 volts. However, it should never exceed 4.5 volts. It can fluctuate a little depending on altitude. The sensor cables should always be moved to check for voltage fluctuations during testing. Broken or loose connections must be repaired if there is any fluctuation. It is necessary to repair damaged cables and loose connections.
- If the voltage signal is higher than 4.5 volts, unplug the FTP sensor and check the voltage again. The harness should be checked for short circuits if the voltage signal remains high even after the sensor has been unplugged. If the high voltage signal is lost when the plug is not plugged in, it is important to check the ground wire as well as the reference voltage that supplies the sensor.
- If these are not displaying any problems, then the sensor is defective and must be replaced.
- If the fault persists even after replacing the sensor it could be that the PCM is faulty. It is important to reprogramme the PCM after replacing it.
How Serious Is the P0453 Fault Code
The driving of your vehicle is not affected by fault code P0453. There are usually no other symptoms than an engine check light that comes on and the smell or fuel. FTP sensors that are defective will not report leaks in the EVAP systems to the PCM. This causes emission values to rise. It is logical to address this fault code immediately.
