P1467 on Buick: How to Diagnose & Fix
EVAP Purge Pump Underspeed
1 Buick model · 1 documented issue · $400-$850 repair
P1467 on Buick by model: symptoms, diagnosis and fix
Unlike older vacuum-driven purge systems, the GM three-cylinder turbo platform uses an electric EVAP purge pump to draw fuel vapor from the charcoal canister into the intake during boost, when there is no manifold vacuum available. The pump's motor and control circuit fail, and the pump can also stick, which lets raw vapor slug the intake. Owners report the check engine light, gasoline smell in and around the vehicle, and in a subset of cases the engine stalling outright while driving. Failures cluster in the roughly 30,000-65,000 mile range on both the Encore GX and the platform-twin Trailblazer.
Common Symptoms
- Check engine light with fuel/gasoline odor
- Engine stalls without warning while driving
- Rough idle immediately after refueling
- Emissions readiness monitors will not set
- Vehicle fails state emissions inspection
How to Fix
Retrieve the exact code before condemning parts, since a loose or cracked fuel cap and canister vent valve faults mimic the symptom. Confirm the purge pump's electrical supply and command state with a scan tool. The real fix is replacement of the electric EVAP purge pump assembly and associated hoses, followed by an EVAP system leak test and a drive cycle to reset readiness monitors. The 8yr/80,000 mile federal emissions warranty often covers this component, so check coverage before paying out of pocket.
Sources for this issue (2)
P1467 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 P1467 mean on a Buick?
P1467 stands for "EVAP Purge Pump Underspeed." General Motors powertrain code. On LEV III-compliant GM engines an electric evaporative emission purge pump, with an integral pressure sensor, is used to raise purge volume and pull fuel vapour out of the EVAP canister. The ECM commands a target pump speed and compares it against the pump's actual reported speed. P1467 sets when actual purge pump speed and desired purge pump speed differ by more than a calibrated amount for longer than roughly five seconds — the pump is turning slower than commanded or not at all. On Buick it is documented across 1 model: Encore GX.
What are the most common causes of P1467?
The most common causes of P1467 are: Liquid fuel drawn into the purge pump, commonly from topping off / overfilling the fuel tank — a known GM failure with a service bulletin, Failed evaporative emission purge pump (seized or worn motor), Open, shorted or chafed purge pump control or feed wiring, Poor electrical connection or corrosion at the purge pump connector, Saturated or contaminated EVAP canister restricting flow, Blown fuse or lost power feed to the pump. The specific cause varies by vehicle.
How much does it cost to fix P1467 on a Buick?
Published repair estimates on Buick range from $400 to $850 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P1467 on a different make?
View P1467 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.