2011 5.7 Hemi Eco mode not working

[douellet20111500]

Hello everybody,

first time visitor to a forum and hoping someone here can tell me why my eco mode in my 2011 Ram stopped working. i have been getting P0420 codes for a little while and ordered all new O2 sensors and hopefully that will solve the code issue but i am wondering if the eco mode has stopped functioning for that reason. Any help or advice would be muchly appreciated

Thanks in advance.

 

[RamDiver]

Have you looked for an intake or exhaust manifold leak yet. There are several other potential causes of this DTC.

Using a parts cannon approach can get very expensive and often prolongs a simple fault.

P0420 Code: Meaning, Causes & How To Diagnose It Like A Pro

P0420 is one of the most common error codes. This guide applies to most vehicles and explains what the code means, what causes it and how to fix it.

mechanicbase.com

And, to Ram Forum.

.

 

[douellet20111500]

Had exhaust manifolds changed out and did recently check for vacuum leaks and intake manifold as well but nothing. Pretty frustrated with this one but like i said hopefully the O2 censors will fix the issue.

 

[Jeepwalker]

How many miles on your truck btw?

 

[RamDiver]

Had exhaust manifolds changed out and did recently check for vacuum leaks and intake manifold as well but nothing. Pretty frustrated with this one but like i said hopefully the O2 censors will fix the issue.

Did the problems begin soon after the exhaust manifold work?

If yes, this might be more than a coincidence.

And was this work completed by a professional?

.

 

[Wild one]

Hello everybody,

first time visitor to a forum and hoping someone here can tell me why my eco mode in my 2011 Ram stopped working. i have been getting P0420 codes for a little while and ordered all new O2 sensors and hopefully that will solve the code issue but i am wondering if the eco mode has stopped functioning for that reason. Any help or advice would be muchly appreciated

Thanks in advance.

If you have a code,it won't go into mds/eco mode

 

[douellet20111500]

How many miles on your truck btw?

The truck has approximately 160,000 miles on it and no other issues to mention.

 

[RamDiver]

The truck has approximately 160,000 miles on it and no other issues to mention.

Are you going to keep us in suspense by not answering the other questions?

.

 

[CanuckRam1313]

Are you going to keep us in suspense by not answering the other questions?

.

Inquiring minds wish to know

 

[RamDiver]

Inquiring wish to know

Is that similar to inquiring minds or...

LOL

.

 

[CanuckRam1313]

Is that similar to inquiring minds or...

LOL

.

Added "minds" as my old mind forgot to include it

 

[RamDiver]

Added "minds" as my old mind forgot to include it

I figured as much, couldn't pass up on the opportunity though.

.

 

[CanuckRam1313]

I figured as much, couldn't pass up on the opportunity though.

Self prescribed senility has its benefits at times

The older I get, the more ***** I can get away with saying.

I'm going to be an epic pensioner and senior one day...world, watch the FFFFFFFFFFFFFFF..... out!!

 

[62Blazer]

As stated above, the part cannon approach is being used there. My first comment that this code, nor any other code, does not states "you need to replace this sensor". This code is stating "catalyst efficiency below threshold" and specifically points to the downstream sensor on bank 1.
- Assuming the sensor is reading correctly this means it senses an issue with the driver's side catalytic converter is not working the way it should. Sure, it could be a bad sensor giving a false reading.....but this is the same mentality of your temperature gauge showing the engine is overheating and you think the repair is changing the temp sensor, and not that the engine may actually be overheating. From my personal experience on codes that have anything to do with O2 sensors, the sensor itself is the problem only maybe half of the time.
- That specific codes only points to one specific O2 sensor, which is the downstream sensor on the driver's side. None of the other 3 sensors have anything to do with this code, and thus no reason to just randomly replace all of them. I will say if the truck still has all the original sensors it may not be a bad idea for new ones, but this particular code is not indicating any issue with the others. I hope you got some good sensors not the generic eBay or Amazon verions.

If you just want to start replacing parts without doing anything else (and you haven't yet), I would recommend at least only replacing the one sensor in question at first. Then verify if the problem still exists, which means if the light doesn't immediately come back on drive it for awhile first. Replacing multiple parts at the same time means you don't know for sure what might have fixed the problem, and sometimes you it may fix the original problem but create another one.

 

[douellet20111500]

Did the problems begin soon after the exhaust manifold work?

If yes, this might be more than a coincidence.

And was this work completed by a professional?

.

Are you going to keep us in suspense by not answering the other questions?

.

Sorry, i did have work done by a licensed mechanic and the issues started some time after this. My fuel economy used to be 12 liter per 100 KM and now its up to 18-19 liter per 100 KM. I was hoping it was just O2 sensors and have ordered them to change regardless as well as a throttle body spacer as i was told this would help my fuel economy.

 

[RamDiver]

Sorry, i did have work done by a licensed mechanic and the issues started some time after this. My fuel economy used to be 12 liter per 100 KM and now its up to 18-19 liter per 100 KM. I was hoping it was just O2 sensors and have ordered them to change regardless as well as a throttle body spacer as i was told this would help my fuel economy.

Ouch! That mileage is much more painful than usual.

Did you read post #14 by 62Blazer and were the O2 sensors ordered OEM or aftermarket? As mentioned, replacing multiple unrelated parts could confuse the issue or create other faults.

You might be best to hold off on using the parts cannon until more investigation has been completed.

If this problem began after work completed by a professional mechanic, the best first action would be to return to that same mechanic and give them the opportunity to make corrections or repairs.

Also, if you or another mechanic complete any testing or attempts to correct this deficiency before that happens, you will have taken possession of the fault and most mechanics will say they can't be responsible for any issues if others have touched it.

.

 

[Wild one]

Sorry, i did have work done by a licensed mechanic and the issues started some time after this. My fuel economy used to be 12 liter per 100 KM and now its up to 18-19 liter per 100 KM. I was hoping it was just O2 sensors and have ordered them to change regardless as well as a throttle body spacer as i was told this would help my fuel economy.

Cancel the throttle body spacer,as it's just a waste of money on a fuel injected vehicle.That mentality is from the old carb days when adding a spacer under the carb gave you more intake plenum volumn.
Who ever told you,it'd help with gas milege,is definitely giving you wrong advice,and needlessly spending your money on you.

 

[CanuckRam1313]

Cancel the throttle body spacer,as it's just a waste of money on a fuel injected vehicle.That mentality is from the old carb days when adding a spacer under the carb gave you more intake plenum volumn.
Who ever told you,it'd help with gas milege,is definitely giving you wrong advice,and needlessly spending your money on you.

I used to flip the lid on the air cleaners on my older carb cars back in the day, just to ensure I had ram air

 

[DILLIGAF]

I dont see the issue

 

[douellet20111500]

Ouch! That mileage is much more painful than usual.

Did you read post #14 by 62Blazer and were the O2 sensors ordered OEM or aftermarket? As mentioned, replacing multiple unrelated parts could confuse the issue or create other faults.

You might be best to hold off on using the parts cannon until more investigation has been completed.

If this problem began after work completed by a professional mechanic, the best first action would be to return to that same mechanic and give them the opportunity to make corrections or repairs.

Also, if you or another mechanic complete any testing or attempts to correct this deficiency before that happens, you will have taken possession of the fault and most mechanics will say they can't be responsible for any issues if others have touched it.

.

Excellent advice and thanks for that as i will use it in future but currently it would be a 32 hour drive to get to the mechanic shop that did the header replacement. I pretty much own the fault already LOL.