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My fuel gauge goes to full as soon as I start the car and never read any differed it goes back to empty when engine is tired off.Also my temp gauge goes past the half mark if I am stuck in traffic or idling or driving very slow at times, why would this happen.I am driving a 2001 Buick century.
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Do you know anything about automotive electronic's ? The fuel level sending unit inside the gas tank is an input to the PCM/ECM / ECU - engine computer , the engine computer sends this information to the instrument clusters microprocessor over serial data network .The microprocessor controls stepper motor to control the gauge . Your best bet , take it to a qualified repair shop that has the proper diagnostic testing knowledge an tools , one being a professional type scan tool that can view fuel level sensor data to an from the engine computer .
9 times out of 10 the fuel pump/level sender assembly is the cause. Sometimes the gauge pod is faulty, and there have been cases where there were either poor connector pin fit issues and/or chaffed/melted/cut wires in the harness that leads back to the fuel pump. It is an extremely common fault and would be surprised if the pump/level sender assembly wasn't the cause.
It could be a bad fuel gauge in the dash unit, but....
Usually it's "The bad".
The fuel level sending wipe arm and windings on the fuel sender wear and send erratic readings.The only cure is a replacement fuel gauge sender.
The check engine light should not be related to the erratic fuel readings.
"The good".
If you have over 200,000kms or 120,000 miles on your van you need a new fuel pump anyway,so have a complete assembly put in which will have a new fuel sender on it.
fuel level sensor is part of the fule pump assembly. code is telling you sensor is malfuctioning. do gauges work? if yes i would leave problem alone till you need a fuel pump
sending unit on fuel pump is bad, the sending unit shorts out gauge will go to empty or full, never read right, turn on switch ,it goes to full or empty, ,check the pump,hope this helps,thanks robert b.
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