P0452 on Ford
Evaporative Emission Control System Pressure Sensor Low Input
P0452 on Ford vehicles indicates evaporative emission control system pressure sensor low input. Au7o has documented this code across 1 Ford model — most commonly on Focus. P0452 means the Evaporative Emission (EVAP) system's fuel-tank pressure sensor is sending a signal that is too low — essentially a flat or below-range voltage. This sensor monitors pressure and vacuum in the sealed fuel system so the computer can run leak tests and manage fuel vapors. A persistently low reading tells the PCM the sensor signal is implausible, often from a short in the circuit or a failed sensor. It generally won't hurt drivability but turns on the check engine light and can cause emissions test failure. Typical repair costs on Ford range from $80 to $250, depending on the specific model and root cause.
Common Causes of P0452
- •Failed fuel tank pressure (FTP) sensor
- •Short to ground in the sensor signal wiring
- •Corroded or loose connector at the sensor
- •Open or damaged sensor reference/signal circuit
- •Sensor mounted/seated improperly on the tank or EVAP line
- •Faulty PCM (rare)
P0452 on Ford by Model
Ford Focus(1 issue)
- Canister Purge Valve Failure Causing Rough Idle and Stalling2012-2018
The 2012-2018 Ford Focus with the 2.0L GDI engine experiences frequent canister purge valve (CPV) failures that cause rough idle, stalling, difficulty starting (especially after refueling), and fuel-related DTCs. The purge valve sticks open, allowing fuel vapors to flood the intake manifold at inappropriate times. This is separate from the carbon buildup issue and is one of the most commonly replaced components on the 2012-2018 Focus. Ford issued TSBs addressing the issue and released updated purge valve designs. The problem affects both manual and automatic (PowerShift) transmission models. Focus Fanatics Forum documents this as one of the top five most-replaced parts on the Mk3 Focus.
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View P0452 across all makes →Frequently Asked Questions
What does P0452 mean on Ford?▼
P0452 stands for "Evaporative Emission Control System Pressure Sensor Low Input." P0452 means the Evaporative Emission (EVAP) system's fuel-tank pressure sensor is sending a signal that is too low — essentially a flat or below-range voltage. This sensor monitors pressure and vacuum in the sealed fuel system so the computer can run leak tests and manage fuel vapors. A persistently low reading tells the PCM the sensor signal is implausible, often from a short in the circuit or a failed sensor. It generally won't hurt drivability but turns on the check engine light and can cause emissions test failure. On Ford specifically, this code is documented across 1 model.
What causes P0452 on Ford vehicles?▼
Common causes on Ford: Failed fuel tank pressure (FTP) sensor, Short to ground in the sensor signal wiring, Corroded or loose connector at the sensor, Open or damaged sensor reference/signal circuit, Sensor mounted/seated improperly on the tank or EVAP line. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0452 on a Ford?▼
Repair costs on Ford range from $80 to $250, depending on the specific model and root cause.
Which Ford models have P0452 documented?▼
Au7o has documented P0452 on 1 Ford model: Focus.