EVAP Issues and Codes after new fuel pump. Can I drive?

[SRD]

Hello. Thanks for reading my post!

I have been having issues with my EVAP system for a while now.

Recently I had a no-crank no-start issue so I replaced the fuel filter and the truck ran fine for 2-3 days. Then it started having hard crank no-start issues. So, I replaced the fuel pump and fuel vapor sensor and the truck ran fine for 3-4 days.

After a few days of driving with the new fuel pump, the truck had more issues with cranking but not starting. The truck also cut off while driving suddenly. So, I took the battery to Wal-Mart and they said it was bad and gave me a new one for free. I installed the new battery and the truck drove fine for 2 days. Then I got 3 codes suddenly and it feels funny and the Check Engine Light came on.

Codes: p0320: Speed input circuit?
Code P0455: Large Gas Leak?
p0402: excessive gas flow?

*I am not sure if it is safe to drive although it starts right up at the moment. Any advice or direction on what to do next would be appreciated.

Thanks for your time.
SRD

 

[franklin2]

P0320 is something to do with the engine speed sensor. If it gets it's speed info from the crankshaft sensor, that is a serious code and could leave you stranded.

P0455 is just a emissions code. Should not cause any problems driving it with that code for a little while.

P0402 is a EGR code. This may cause nuisance stalling and it will only run if you hold the gas pedal down some. Aggravating but you should be able to limp home with it.

 

[SRD]

Thanks for the input! After driving another 50 miles the Dash CEL light went off?? The Codes are still stored in the module but they just vanished from the dash.? Like 3 days then went away on their own.

I was told a battery can cause a p0320 in a ranger but I hear a lot of things.....so much to know.

As of now, it's running fine no CEL...So, will keep updating.

Thanks for the input and review.
SRD