P0452 on Pontiac
Evaporative Emission Control System Pressure Sensor Low Input
P0452 on Pontiac vehicles indicates evaporative emission control system pressure sensor low input. Au7o has documented this code across 1 Pontiac model — most commonly on Bonneville. 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.
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 Pontiac by Model
Pontiac Bonneville(1 issue)
- Fuel Tank Pressure Sensor Defect — Fuel Leak and Fire Risk (NHTSA Recall 03V238000, SSEi)2002-2003
Under NHTSA recall 03V238000 (GM recall 03038), the fuel tank pressure sensor on supercharged Bonneville SSEi models is unusually susceptible to malfunction; a failed sensor lets the EVAP system apply excessive vacuum during self-diagnostic testing, damaging fuel system components. Fuel can then leak from the vehicle during refueling, creating a fire hazard in the presence of an ignition source. The campaign covered roughly 102,000 GM vehicles including the Bonneville SSEi, with owner notification beginning October 17, 2003.
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View P0452 across all makes →Frequently Asked Questions
What does P0452 mean on Pontiac?▼
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 Pontiac specifically, this code is documented across 1 model.
What causes P0452 on Pontiac vehicles?▼
Common causes on Pontiac: 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 Pontiac?▼
Repair costs vary widely depending on the root cause and specific Pontiac model.
Which Pontiac models have P0452 documented?▼
Au7o has documented P0452 on 1 Pontiac model: Bonneville.