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Old 07-09-2011, 11:27 AM   #1
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Error codes possibly related to Transferflow tank

About every 4th or 5th tank of gas, the check engine light comes on. The ScanGauge reports it as P1450 - Inability of Evaporative Emission Control System To Bleed Fuel Tank. The last time it happened, the code was P0451 - Evaporative Emission Control System Pressure Sensor Range/Performance. I clear the code, open the gas cap to relieve the pressure, replace it and I am good to go until it happens again. I never notice any change in the drivability when this happens. Should I be concerned? Does it warrant a call to Transferflow? Quadvan did the installation of the Sportsmobile 46 gallon tank and I don't have problems filling it to the top like others have reported. Any ideas?

Steve in L.A.
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Old 07-09-2011, 11:59 AM   #2
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Re: Error codes possibly related to Transferflow tank

Steve,

Several years back I had the check engine light come on in my Ford pickup after I would fill the tank. A friend told me to put on a new gas cap before I do anything else. I did it and have never had the problem again. It was the lowest cost thing I could do first. It may not work for you but it doesn't cost much to try it.

Good luck,
Woody
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Old 07-09-2011, 06:41 PM   #3
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Re: Error codes possibly related to Transferflow tank

Gas cap is a good start.

If that doesn't fix it, maybe the vacuum line to the charcoal canister is collapsed/pinched?
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Old 07-09-2011, 07:33 PM   #4
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Re: Error codes possibly related to Transferflow tank

The error started happening after I replaced the stock cap with this cap. After a couple of errors I went back to the original cap, but I still get the error. I'll try a new cap and check the line to the charcoal canister too. Thanks.

Steve in L.A.
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Old 07-09-2011, 09:30 PM   #5
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Re: Error codes possibly related to Transferflow tank

The gasket on the cap might not be sealing- I'm thinking dried out?

They test them for emissions here, and I read a tiny bit of vasoline wiped on the gasket helps- so I did that before my last emissions test... it took a year before it stopped sealing to the point I could hardly get the cap off.
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Old 07-27-2011, 02:06 PM   #6
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Re: Error codes possibly related to Transferflow tank

I had serious problems early on with the check engine soon light and also not being able to fill my tank without gas leaking. The 46 g tank was installed by SMB. After much expense by SMB, many extra miles on the van and dropping the tank a number of times and taking the van all the way to Chico (Transflow) it was still not fixed. The service engine soon light kept coming on and codes indicated a leak. Finally I simply took it to my mechanic. He ran a smoke test. Their were nails that extended too far through the floor of the SMB conversion and into the charcoal filter. We changed out the charcoal filter and cut off the extended nails and the problem was solved.
By the way SMB payed the bills. The mileage was on me. Best RD
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