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Can the Check Engine Light Come on Due to a Bad Gas Cap?

RepairSmith

Faced with the dreaded Check Engine Light (CEL)? While it’s easy to jump to the worst conclusions, sometimes your vehicle may simply trigger the Check Engine Light for gas cap issues. Let’s understand the connection between a bad gas cap and the Check Engine Light and how you can fix it.

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Top 8 Causes Behind a GMC Check Engine Light (+ How to Fix)

RepairSmith

The dreaded GMC check engine light illuminating your dashboard is enough to have anyone wondering: What’s wrong with my car? While the little yellow light is undoubtedly a concern, it may just be a loose gas cap that needs tightening. This Article Contains: What Causes GMC Check Engine Light to Turn On?

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Ask The NAPA Experts: How To Check Fuel Pressure

The NAPA Network

To test the fuel pressure with the engine running, leave the fuel pressure gauge attached, but place it where it will not contact any of the rotating engine accessories (fan, fan belt, pulleys, etc), and ensure the gauge will not fall due to engine vibration. Start the engine, and observe the fuel pressure gauge.