DEF Tank replaced
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Cross-Country
Joined: Jul 2003
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DEF Tank replaced
Had my DEF tank replaced. The CEL was on and the tech thought it was the problem. Here is what he wrote, don't know what it all means but for the readers benefit I post it " verified concern. Installed IDS ran selftest p202d p20e8. checked oasis found ssm 21646. removed scr injector and performed flow test and check sample ok. performed manual regeneration was at 62%. performed scr reset and retest same codes. replaced def tank assembly and cleared codes. retest ok" 2011 w/17k miles bought May 2010.
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Joined: Apr 2004
Posts: 1,399
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From: Corinth, TX
not sure what to make of that... but the "performed manual regen" part is interesting. Do you have a cab/chassis? If not... then there is potential for an aftermarket product to trigger this, even on pickups!
Cross-Country
Joined: Oct 2007
Posts: 74
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There is a manufacturing flaw in some tanks. I had mine replaced a couple of weeks ago whem my CEL came on. Basically what my symptons were was low injector pressure. When the DEF tank was full pressures were normal but when the level dropped in the tank to X level the pressure dropped. We (myself and the tech) put our heads together and determined the pick up tube in the tank was sucking air so he ordered an entire new assembly and installed it. All is normal now.
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Joined: Oct 2010
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I'm thinking they could have made it 6 gallons and allow me to make it to an oil change if that's the case.
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Post Fiend
Joined: Jan 2009
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From: Greenwood, SC
Well, the 5 gal tank is the reason us crew cab short box trucks have the dang 26 gal fuel tank, if the DEF tank were bigger, fuel tank would be even smaller. Sheesh.
And, after a little over a year, here is what I think the DEF usage is like, driving condition going from most DEF use to least.
1. Towing in the hot summer months
2. Driving in the hot summer months
3. Towing in the cooler months
4. Towing in the winter
5. Driving in the winter
And, at idle almost no DEF is used unless it is a hot summer day. The DEF is used when a certain amount of NOx is detected, which is relative to the temp of the exhaust and air/fuel mix. I'm sure there is a lot of tech that I am glossing over, but just trying to share my experiences.
And, after a little over a year, here is what I think the DEF usage is like, driving condition going from most DEF use to least.
1. Towing in the hot summer months
2. Driving in the hot summer months
3. Towing in the cooler months
4. Towing in the winter
5. Driving in the winter
And, at idle almost no DEF is used unless it is a hot summer day. The DEF is used when a certain amount of NOx is detected, which is relative to the temp of the exhaust and air/fuel mix. I'm sure there is a lot of tech that I am glossing over, but just trying to share my experiences.
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Got a link or name of the company?
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