2006 E320 CDI P0030 CEL?
Thread Starter
Junior Member
Joined: May 2017
Posts: 37
Likes: 0
2006 E320 CDI
2006 E320 CDI P0030 CEL?
My ’06 E320 CDI is displaying a CEL, P0030.
I’ve owned the car for roughly one year and originally the P0030 CEL would only show up intermittently. I’d clear the code and it wouldn’t come back on for months. Several months ago I decided to replace the O2 sensor in an effort to ‘fix’ the P0030 issue. The installation of the new Bosch O2 sensor seemed to have cured the CEL issue, until recently. Now, the P0030 CEL is on constantly.
I’m thinking that since the O2 is relatively new, the issue must be something else. The car is continues to deliver great MPG (38 mixed city/highway) and no noticeable changes in drivability. Any idea on what the cause might be? ECM?
Mike
I’ve owned the car for roughly one year and originally the P0030 CEL would only show up intermittently. I’d clear the code and it wouldn’t come back on for months. Several months ago I decided to replace the O2 sensor in an effort to ‘fix’ the P0030 issue. The installation of the new Bosch O2 sensor seemed to have cured the CEL issue, until recently. Now, the P0030 CEL is on constantly.
I’m thinking that since the O2 is relatively new, the issue must be something else. The car is continues to deliver great MPG (38 mixed city/highway) and no noticeable changes in drivability. Any idea on what the cause might be? ECM?
Mike
Senior Member
Joined: Jan 2011
Posts: 422
Likes: 52
From: McDade, Texas
W211 e320 CDI
I’d need more accurate or perhaps higher resolution data than a simple code. My car is straight pipes but I still use the lambda and 214k miles now have never had a code from it. The wiring does run VERY close to some hot parts if routed correctly, the tiniest mistake maybe melting your new Bosch wires?
Last edited by Micah / AF1 Rac; Jul 17, 2018 at 06:13 AM.
Thread Starter
Junior Member
Joined: May 2017
Posts: 37
Likes: 0
2006 E320 CDI
I simply didn't have the time to move forward and diagnose this issue myself any further...
Since the car needed an oil change anyway, I had the dealer look into the CEL. They found an issue with my replacement Bosch O2 sensor and replaced it with an OEM sensor. Thus far, no CEL or any additional issues to report. I'm hoping this new sensor will do the trick. My fingers are crossed.
Mike
Since the car needed an oil change anyway, I had the dealer look into the CEL. They found an issue with my replacement Bosch O2 sensor and replaced it with an OEM sensor. Thus far, no CEL or any additional issues to report. I'm hoping this new sensor will do the trick. My fingers are crossed.
Mike
Thread Starter
Junior Member
Joined: May 2017
Posts: 37
Likes: 0
2006 E320 CDI
Well, the CEL is back on and the car is back at the dealer. The O2 sensor did not remedy the issue. They are now looking downstream for the issue. I'll report back with what they find and the new potential fix.
Mike
Mike
Senior Member
Joined: Jan 2011
Posts: 422
Likes: 52
From: McDade, Texas
W211 e320 CDI
Do you have icarsoft or equivalent? Generic lambda sensor codes are usually explained as having something to do with something else, my Audi for example is always “Bank 1 sensor 2 catalyzer efficiency issue”?
Thread Starter
Junior Member
Joined: May 2017
Posts: 37
Likes: 0
2006 E320 CDI
I'm trusting that the dealer has the necessary equipment and will be able to diagnose the issue and eventually fix the CEL.
We'll see...they still have the car...
Mike
Trending Topics
Thread Starter
Junior Member
Joined: May 2017
Posts: 37
Likes: 0
2006 E320 CDI
The dealership has found that the ECU is causing the CEL. They have ordered the part and it should arrive and get installed next week. I'm hoping that the new ECU will solve the issue...we'll see.
Mike
Mike
MB World Stories
The Best of Mercedes & AMG
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)
Verdad Gallardo
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun
Verdad Gallardo
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren
Verdad Gallardo
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine
Verdad Gallardo
Flawlessly Restored Mercedes 190E Evo II Heads to Auction
Verdad Gallardo
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know
Verdad Gallardo
Mercedes EQS Gets A Major Update: Everything You Need to Know
Verdad Gallardo
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve
Verdad Gallardo
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping
Verdad Gallardo
MBWorld Fanatic!
Joined: Nov 2017
Posts: 1,218
Likes: 149
From: Bethesda, MD
2010 Mercedes GL450; 2000 Mercedes ML55 AMG; 2016 VW GLI SEL Stick!!!
Might be too late for you, but I saw this on the smart forum and it might help the next person.
https://carcomputerexchange.com/merc...prod_1444.html
https://carcomputerexchange.com/merc...prod_1444.html
Thread Starter
Junior Member
Joined: May 2017
Posts: 37
Likes: 0
2006 E320 CDI
The new ECU did indeed fix the P0030 CEL.
Mike
Last edited by Rdrcr; Mar 3, 2019 at 05:33 PM.
