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What Causes the Failure of the Purge Pump?

2 Answers

SanZoey

09/05/25 3:08am

The reasons for the failure of the purge pump include a faulty charcoal canister, issues with the purge pump circuit, and the purge pump itself. Below are detailed explanations: Faulty Charcoal Canister: A technician lifts the vehicle with a hoist, removes the charcoal canister, and uses an air gun to check for blockages, thereby confirming the issue. If the charcoal canister is faulty, it cannot absorb fuel vapor from the tank, causing the purge pump to malfunction. Regularly inspect the charcoal canister for faults and replace it promptly to avoid accidents. Purge Pump Circuit Issues: A technician opens the engine hood and examines the purge pump circuit for any damage or breaks to confirm the problem. If the purge pump circuit is faulty, it cannot supply power to the purge pump, leading to its malfunction. Faulty Purge Pump: A technician uses a diagnostic tool to read the purge pump's data stream and analyze its operational status. If abnormal, the technician can measure the purge pump's resistance with a multimeter. If the resistance is outside the normal range, the fault is confirmed.

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RoseDella

09/17/25 3:48am

There are several common reasons why the purge pump might fail, and I believe the primary cause is electronic component failure. For instance, aging wiring or blown fuses, which often occur more frequently in humid weather. Additionally, poor contact in the motor or relay inside the pump can directly lead to operational failure. Sometimes, excessive vibration or loose parts can also cause issues. The purge pump is a critical component for handling fuel vapor, and if it fails, it will trigger the engine warning light and increase emissions pollution. It's best to promptly visit a repair shop for inspection. During the inspection, professional tools should be used to test circuit continuity, and avoid self-disassembly to prevent secondary damage. Regular maintenance is also important.

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