P0452 on Pontiac: How to Diagnose & Fix
Evaporative Emission Control System Pressure Sensor Low Input
1 Pontiac model · 1 documented issue · 1 critical
P0452 on Pontiac by model: symptoms, diagnosis and fix
NHTSA campaign 03V238000/GM 03038 covers certain 2002-2003 Pontiac Bonneville SSEi vehicles equipped with the supercharged 3.8L V6. The fuel-tank pressure sensor may malfunction and allow excessive vacuum during self-diagnostic testing; resulting fuel-system damage can permit a leak during refueling and create a fire risk in the presence of an ignition source. NHTSA lists 102,212 total vehicles across the multi-make campaign, not 102,212 Bonnevilles. The campaign record does not establish the frozen page's added inaccurate-gauge, tank-noise, poor-driveability or P0452/P0453 symptom set.
Common Symptoms
- VIN checked for campaign 03V238000/GM 03038
- fuel odor or leakage during refueling treated as a stop condition
- campaign population separated from total multi-make units
- non-recall EVAP symptoms diagnosed independently
How to Fix
Check the VIN in the NHTSA and GM recall systems for campaign 03V238000/03038 completion or an open remedy. If fuel odor or leakage is present, stop refueling, shut the vehicle off away from ignition sources, do not restart it, and arrange qualified inspection. The campaign remedy is dealer replacement of the fuel-tank pressure sensor; current availability and any charge for a vehicle of this age must be confirmed with GM rather than promised here. Do not buy a pressure sensor or other EVAP/fuel-system part from this page; recall eligibility, leak condition, part number and VIN fitment must be established first.
Sources for this issue (2)
P0452 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0452 mean on a 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 it is documented across 1 model: Bonneville.
What are the most common causes of P0452?
The most common causes of P0452 are: 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). The specific cause varies by vehicle.
How much does it cost to fix P0452 on a Pontiac?
Repair costs vary widely with the root cause and Pontiac model; each issue on this page carries its own estimate where one is published.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.