← Back to list

2004 Ford Taurus P0453 Code: EVAP System Pressure Sensor Issue After Fuel Pump Replacement

Model: Ford Taurus Fault Code: P0453 Posted: 2019-05-15 06:41

I recently replaced the fuel pump on my 2004 Ford Taurus and now the check engine light is on with code P0453. This code indicates that the evaporative (EVAP) system is detecting abnormally high pressure readings—specifically, a voltage reading above 4.5V from the EVAP pressure sensor. The EVAP system captures fuel tank vapors and routes them to the engine for combustion, preventing harmful emissions. A pressure sensor, often referred to as the FTP (Fuel Tank Pressure) sensor, continuously monitors system integrity. When the Powertrain Control Module (PCM) detects a pressure reading higher than normal, it logs P0453. Important note: The original fuel pump assembly on my 2004 Taurus did not include a built-in pressure sensor. According to the replacement fuel pump's disclaimer, the black FTP sensor located on top of the fuel tank must be reused during installation. However, I cannot locate this sensor in any parts catalog or repair guide for this model. I have confirmed that after replacing the fuel pump, the P0453 code persists. The scan tool shows a voltage reading above 4.5V, which is outside factory specifications and points to either a faulty sensor or an unintended leak in the EVAP system. I am unable to find reliable information about the exact location or replacement part for this sensor on a 2004 Taurus. Any guidance on locating the EVAP pressure sensor, diagnosing the issue, or confirming whether it's related to the fuel pump installation would be greatly appreciated.

Related fault codes
P0453
Comments (9)
Anonymous 2019-05-15 09:23

If your scan tool shows a voltage above 4.5V, try unplugging the EVAP pressure sensor and check the reading again. If the high voltage persists when disconnected, inspect the wiring harness for a short to power or ground on the signal wire. If the voltage drops to normal when unplugged, verify that the sensor has proper grounding and a 5V reference voltage. If both are present, the sensor is likely faulty—replace it. Note: This diagnosis applies specifically to vehicles with an EVAP pressure sensor connected to the fuel tank.

Anonymous 2019-05-15 18:18

Thanks for the troubleshooting steps, but I'm having trouble locating the exact position of the EVAP pressure sensor on my 2004 Taurus. It doesn't appear in any auto parts store databases or online listings with clear model-specific details.

Anonymous 2019-05-15 18:55

Is the EVAP pressure sensor part of the fuel pump assembly? I'm trying to confirm whether it's included or separate.

Anonymous 2019-05-16 04:54

No, the replacement fuel pump I installed does not include a pressure sensor. The original black FTP sensor must be reused from the old unit. I found a compatible part online: https://www.summitracing.com/parts/rnb-...gLx7_D_BwE

Anonymous 2019-05-16 07:18

Are there any visible wiring or hoses connected to the fuel tank that could be contributing to the issue? I'm not familiar with the exact layout on a 2004 Taurus.

Anonymous 2019-05-16 10:07

No, there are no additional wires or hoses attached to the pump housing. The only sensor is the one on top of the fuel tank.

Anonymous 2019-05-16 13:42

Check the top of the fuel tank. Try lowering it slightly—sometimes this helps expose the sensor and allows better access for inspection.

Anonymous 2019-05-19 08:12

The EVAP pressure sensor is typically located on top of the fuel tank, separate from the fuel pump assembly. It's a three-wire sensor sometimes called a fuel tank pressure transducer or evaporative vapor pressure sensor. Some vehicles have two sensors—one mounted on top of the tank and another near the driver’s side rear of the tank. While my diagnostic system shows both, I can't find any official replacement parts for the 2004 Taurus model.

Anonymous 2019-05-20 04:59

I’ve located the EVAP pressure sensor physically on the fuel tank, but it's not listed in any auto parts locator. A part that looks similar is available online, but all major auto parts stores state it doesn't fit my 2004 Taurus. This suggests either a model-specific issue or an incorrect part match.