why does an egr delete throw a code?
Junior User
Joined: May 2014
Posts: 59
Likes: 0
From: Southern Ohio
To my understanding it is because with Ford's latest flash strategy, the PCM checks for response from the EGR valve for adequate exhaust flow and when it is out of range, a CEL is generated. I have often wondered if this new logic applied to the flash update is maybe due to the fact Ford realize many people would just delete the EGR cooler to end the hassles with them and with the later flash that would help show the EPA that they are trying to maintain compliance.
Senior User
Joined: Mar 2014
Posts: 193
Likes: 1
Just out of curiosity, how does the truck know that there is no exhaust flow anymore? Considering there are no sensors on the EGR cooler and if the EGR valve is left hooked up and in the intake, how can the truck notice the difference?
Fleet Owner
Joined: Mar 2003
Posts: 24,724
Likes: 74
From: Blue Hill Township
The MAF sensor will read lower when the EGR valve is open.
IAT2 will be higher when the EGR valve is open.
IAT2 will be higher when the EGR valve is open.
Trending Topics
Thread Starter
|
Freshman User
Joined: Feb 2015
Posts: 25
Likes: 0
From: Noble, OK
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Fords at 2026 Carlisle Ford Nationals
Joe Kucinski
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Lead Driver
Joined: Feb 2011
Posts: 8,241
Likes: 155
From: L.A. (Lower Alabama)
In addition to the items mentioned the EGR valve position is monitored directly by the ECU. It's one of the few devices that accepts commands and reports info, (bi-directional communication) the fan clutch being another one.
New User
Joined: Apr 2015
Posts: 6
Likes: 0
I understand if you do a EGR delete then you need a tuner to get rid of the CEL. What I don't understand is....do you need to leave the tuner plugged in all the time or can I hook it up, get rid of the CEL , and disconnect it. For example can I borrow a tuner just to get rid of the code and give it back? Or do I need to buy one and leave it hooked up all the time in order to keep light off?
New User
Joined: Apr 2015
Posts: 6
Likes: 0
Ok. Will my scanguage II turn off the CEL? I know it can't get rid of the code. I just didn't want to live with the annoying light. If the scanguage will turn off the light. Will it come back on every time I start the truck?
Sorry for the dumb questions. I'm still debating on an EGR delete or to buy the bulletproof EGR cooler.
Sorry for the dumb questions. I'm still debating on an EGR delete or to buy the bulletproof EGR cooler.