P0452 on Dodge
Evaporative Emission Control System Pressure Sensor Low Input
P0452 on Dodge vehicles indicates evaporative emission control system pressure sensor low input. Au7o has documented this code across 1 Dodge model — most commonly on Challenger. 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 Dodge range from $30 to $900, 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 Dodge by Model
Dodge Challenger(1 issue)
- Fuel Tank Hard to Fill / Nozzle Clicks Off Repeatedly (EVAP Venting)2008-2023
Many Challenger owners report that the fuel tank is hard to fill and the gas pump nozzle clicks off (shuts off) repeatedly before the tank is full, often with fuel backing up or spitting out of the filler neck. RepairPal lists this as one of the most-reported Challenger problems, with a dedicated problem page; in their data the complaints were concentrated on the 2008-2009 cars (5 owners reporting, around 65,000 miles average), but owner forums (ChallengerTalk, Hellcat.org) show the same premature-shutoff complaint persisting across later SXT, R/T, Scat Pack and SRT Hellcat models. The root cause is the EVAP (evaporative emissions) venting path that is supposed to let air/vapor escape the tank as fuel goes in. When that path is restricted, displaced vapor cannot vent, tank pressure rises, fuel backs up into the filler neck, and the nozzle's automatic shutoff senses 'full' prematurely. Specific culprits identified by RepairPal and dealer/diagnostic sources include a restricted or kinked vapor recirculation tube, a faulty fuel fill (filler) tube, a clogged EVAP fresh-air filter or vent line, and a malfunctioning EVAP canister vent/control valve. RepairPal also documents a saddle-style (two-half) tank design on some cars where an internal fuel-distribution/overfill mechanism malfunctions and trips the overfill sensor early, in which case the cure was a complete fuel tank replacement. On modern cars the same symptom frequently appears alongside EVAP fault codes (P0440, P0441, P0452), and a stuck or restricted purge/vent path is the first thing to check. The issue is overwhelmingly a fueling-station annoyance and slow-fill nuisance rather than a safety or driveability defect, which is why it rates LOW severity, though it is highly searchable because so many owners hit it at the pump.
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View P0452 across all makes →Frequently Asked Questions
What does P0452 mean on Dodge?▼
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 Dodge specifically, this code is documented across 1 model.
What causes P0452 on Dodge vehicles?▼
Common causes on Dodge: 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 Dodge?▼
Repair costs on Dodge range from $30 to $900, depending on the specific model and root cause.
Which Dodge models have P0452 documented?▼
Au7o has documented P0452 on 1 Dodge model: Challenger.