Just fitted my new TF medium duty lift. When backing out I got a P0463 code and the fuel guage dropped to empty.

Code P0463 indicates the voltage signals from the Fuel Level Sensor are irrationally high and indicating the impossible condition of there's more fuel in the tank than the tank can actually hold. - found online... Don’t have access to rave at the immediate moment.

nothing near the fuel tank was unplugged or messed with. Ideas?

 

Don’t everyone answer at once

 

You know that this forum isn't a paid service that is required to answer all questions within a deadline... right?

That being said, P0463 is a fuel level sensor over voltage fault. Meaning the computer incharge is receiving more than 4.29v out of the sensor. Either you have a wire shorted to your level sensor and giving you too much voltage, or the sensor is bad.

 

1. Just trying to bump my post, kind of lost with this one. Thank you for responding. Everyone here is just looking for some help, right?

2. Is this sensor within the fuel pump? Is it possible to replace just the sensor? Also why/how did installing a lift trigger this? Or is it just totally unrelated and bad timing.

 

A complete new fuel pump for an 04 with SAI is around 45-65.00 online (Ebay for example). I'd lift up the carpet, remove the fuel pump access panel and check the wiring. If it looks ok a replacement pump might be the way to go.

How much fuel is in your D2 anyways? Maybe from all the jacking/lifting the float got stuck?? Just an idea

 

That price is great considering the prices on AB. When we installed the lift, the level was already fairly low. Afterwards I filled up and it didn’t change, so it is a possibility on it being stuck! How exactly would I unstick it though? Maybe some big potholes...?

 

I'd lift the carpet, inspect wiring harness, and just remove it to inspect it. I've swapped the entire thing out in as little as half an hour. Electrical plugs, 2 quick connect lines, and a giant metal ring which secures it to the fuel tank.

What happens when you clear the code with a scantool? Does the fuel gauge ever act normal? Or does it just instantly fault? I've seen plenty of RRC/D90/D1/D2 fuel pump assemblies with bare wires or nearly bare wires due to higher levels of ethanol in the fuel these days.

 

If I clear it with my ultra guage the fuel guage stays the same and the code comes back a minute later. I’ll take a look at the wires and see if that’s the issue but probably end up replacing the pump. Thanks for your help!

 

No problem, if you live in an area with some ethanol in all the gas you might be shocked at what you find lol.