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by Eddie Carrara
I’ve been working on cars for over 35 years.
I’m an ASE-Certified Master Technician, and I’ve spent most of my life diagnosing and repairing vehicles—starting right out of high school and continuing ever since.
But this site isn’t about me.
It’s about helping you understand your car—and avoiding unnecessary repairs.
Nissan Fuel Gauge Not Reading Accurately
Nissan Fuel Gauge Not Reading Accurately After Refueling.
If you’ve purchased a new Nissan and filled the tank with the engine running or the key on, your Nissan fuel gauge will not be reading accurately and you might see the ‘miles till empty’ display show 3 dashes and an incorrect reading. To fix this, disconnect the negative battery terminal for 5 minutes. Then, drive the vehicle for 5 miles. This should recalibrate the fuel gauge.
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Always avoid refueling with the key on or engine running to prevent triggering the check engine light. Modern vehicles perform diagnostic tests when the key is on, especially when the engine is running.
These tests check emissions, electrical systems, and modules for inconsistencies and malfunctions. Even when parked, your vehicle is testing systems and updating software.
If you do happen to fuel your vehicle with the key on or with the engine running, it’s likely that your emissions monitor will have detected a significant leak on the fuel tank side, P1456, and will illuminate the yellow check engine light.
In older vehicles, you could easily disconnect the negative side of the battery for 5 seconds to clear the code, until the problem occurred again. However, those times are gone.
Today, vehicles will store the code for several drive cycles, and the only way to clear the check engine light is to drive the vehicle for three complete drive cycles. Each cycle involves starting the engine from a cold state, allowing it to reach normal operating temperature, then shutting it off and letting it cool completely before the next cycle. Alternatively, you can clear the code with a handheld scan tool.
This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.
