Why Does My Gas Gauge Keep Jumping?Ī mechanical failure may be to blame for the erratic displays of fuel gauge contents between empty and full. If the gauge needle fails to sweep through and back calibration points during this test, a replacement instrument cluster must be purchased. The actuator test will be aborted if the ignition switch is turned to the off position or if a message indicating that the vehicle is moving is received via the CAN data bus. Use a diagnostic scan to determine the source of these problems. The CAN or LIN data bus may still not work properly. A successful test of the actuator will confirm that the instrument cluster is operational. If you have selected one of these inputs, it will tell you if the gauge can point to the correct position. Make sure the gas gauge is operational and perform an Actuator Test. ![]() They will be able to determine if it’s a simple fix like adjusting the gas tank’s mounts or if a more serious repair is needed. If you’re notice your gas gauge jumping around, it’s best to take it to a qualified mechanic to have it diagnosed. If the sending unit is not working correctly, it can cause the gas gauge to give inaccurate readings. This is the component that tells the gas gauge how much fuel is in the tank. Another possibility is that the Jeep’s fuel sending unit is faulty. This can cause the gas gauge to jump around if the Jeep is driven on rough roads or off-road. One possibility is that the Jeep’s gas tank is mounted on the frame in a way that makes it susceptible to vibration. While this may be alarming at first, there are a few potential reasons why this is happening. ![]() It’s not uncommon for Jeep Wrangler owners to notice their gas gauge fluctuating or jumping around while driving.
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