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P0452 is a diagnostic trouble code (DTC) for "Evaporative Emission Control System Pressure Sensor Low Input". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.
A P0452 trouble code is related to the part of a vehicle’s emissions control system, or EVAP, that controls fuel tank pressure. This is usually called the fuel tank pressure sensor or the evaporative pressure sensor.
P0452 is an OBD-II generic code for a voltage issue with the EVAP system in that the voltage received by the engine computer from the system is not within the manufacturer’s parameters.
The most common causes for a P0452 include:
Other than a Check Engine Light, a P0452 will likely not cause any noticeable symptoms. Other EVAP codes may be present.
Like any EVAP code, your mechanic will first inspect the fuel cap, retighten it, clear the code, reset the engine computer, and test the vehicle to see if the code returns. If not, then it’s just another case of “loose gas cap syndrome.” However, if the code persists, the fuel tank pressure sensor could be the culprit. With a professional OBD-II scanner, your mechanic can look at the fuel tank pressure readings to see if the engine computer is reading vacuum from the sensor. If not, the wiring from the sensor should be inspected to ensure there isn’t a communication error before replacing the pressure sensor.
The most common mistake is replacing the pressure sensor when the problem simply was the fuel cap was not tight enough. If other EVAP codes are present with a P0452, those issues may also be the route cause.
While they can increase a vehicle’s emissions and carbon footprint, most EVAP related codes have zero effect on a vehicle’s performance.
The most common repairs for a P0452 are as follows:
The fuel tank pressure sensor is usually on top of the fuel tank by the primary pump, meaning that unless your vehicle is equipped with an access panel, you’ll have to remove the fuel tank to access the sensor.
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