Chevrolet Impala check engine light issue diagnosed as fuel pump module problem on Chevrolet Impala

Submitted by Vehicle Owner · Jun 23, 2025
Published by RepairPal

Problem overview

Some Chevrolet Impala owners report experiencing issues with the check engine light related to the fuel pump module, which serves as a warning indicator for various engine problems. These owners often find that if the check engine light activates shortly after refueling, it may be due to a loose or misplaced fuel cap. Additionally, a flashing check engine light can indicate a serious issue, such as a catastrophic misfire, which could damage the catalytic converter and lead to backfiring. While the check engine light is frequently triggered by emission system problems, it can also signal issues in the ignition system, engine timing system, and transmission. It is crucial for owners to address any diagnosed fuel pump module problems promptly to prevent further complications and ensure the vehicle operates correctly.

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