Engine problems, yellow light on , help please?
Thread Starter
Member
Joined: May 2010
Posts: 98
Likes: 0
C63 AMG 2009
Engine problems, yellow light on , help please?
My 09 with 23K mls during day time temperatures in winter time in Houston between 50-70 degr F, the few rare days in the season in Houston you can actually give your AC a rest, always starts up well , with the great bark to start off. Having said that, during these days and I am not sure if there is a relation between AC running or not, with the AC turned OFF after the engine is warmed up and you slow down at a traffic light or start up after running an errand, the idle is always very rough, and getting worse. sometimes I hear it runs on only 5or 6 cylinders , almost shutting off until I give it a little throttle, hackles and puffs comes back to live most of the time. The yellow light blinking. This morning it started up ok but the yellow light is now solid. Going to drop it off this afternoon. Oil level is fine. I always treat the car with respect, slow warm up an only gun it for some fun occasionally when and where possible and only if the engine oil is 16oF and up.
Any ideas or suggestions?
Thanks!
Any ideas or suggestions?
Thanks!
Super Member
Joined: Feb 2012
Posts: 620
Likes: 7
From: Sacramento, CA
'09 C63
Off - topic but I feel like the newer/face lifted models have an easier time accepting tunes. I have an 09 as well, but when I run it with a tune it isn't always perfect. Just a thought.
Thread Starter
Member
Joined: May 2010
Posts: 98
Likes: 0
C63 AMG 2009
It's at the dealer. Indeed the codes will tell the story I hope. My service tech told me I should not be concerned that anything major is wrong as these engines are very reliable and he has not seen major issues on these engines. I am still under warranty as well.
Will keep you posted about any news on this.
Will keep you posted about any news on this.
Banned
Joined: Jun 2013
Posts: 1,317
Likes: 3
S550 on order
my CEL stays on now...i have 2nd cat delete and CF boxes and a eurocharge tune...the dealer says nothing is wrong with the car ..it's just having the 2nd cats gone thats throwing CEL but other then that theres no issues.
Trending Topics
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
Senior Member
Joined: Feb 2009
Posts: 304
Likes: 0
From: Las Vegas
C63 & Mustang Mach1(s)
This is interesting. We all have an Eurocharged tune with a cel. P0171 for me. Got it right after v4 was installed, I just keep clearing it. Lean bank1 which is definately related to the tune because when I had the v3 tune almost every time I dove it I would have to clean the exhaust tips when I returned home. Now I don't have to clean them AT ALL.
To lazy to send the ECU back. But may have to at some point. Thoughts?
To lazy to send the ECU back. But may have to at some point. Thoughts?
Banned
Joined: Jun 2013
Posts: 1,317
Likes: 3
S550 on order
This is interesting. We all have an Eurocharged tune with a cel. P0171 for me. Got it right after v4 was installed, I just keep clearing it. Lean bank1 which is definately related to the tune because when I had the v3 tune almost every time I dove it I would have to clean the exhaust tips when I returned home. Now I don't have to clean them AT ALL.
To lazy to send the ECU back. But may have to at some point. Thoughts?
To lazy to send the ECU back. But may have to at some point. Thoughts?
Banned
Joined: Jun 2013
Posts: 1,317
Likes: 3
S550 on order
MBWorld Fanatic!
Joined: Aug 2012
Posts: 3,398
Likes: 371
c63
Banned
Joined: Jun 2013
Posts: 1,317
Likes: 3
S550 on order
SPONSOR
Joined: Jul 2007
Posts: 5,459
Likes: 152
From: Houston/ Austin /Toronto / UAE / Minneapolis / Orlando /Cincinnati
Eurocharged Performance ML63 and TT lambo
right on the money!
Super Member
Joined: Aug 2006
Posts: 605
Likes: 0
From: NJ,USA
'10 c63,'03expedition,ducati999,22'Donzi
i had taken my charcoal filters out and i kept getting that code. i put them back and i havent gotten it since.i have a tune,LTH,no cats, and dry filters.suxs when the CEL is on
MBWorld Fanatic!
Joined: Oct 2012
Posts: 3,704
Likes: 19
From: Denham Springs,LA
'12 C63 Black Series, '12 ML350 BlueTech
I wouldn't say this code means necessarily faulty O2 sensor. This is one of the probable causes but there are other scenario that could throw this CEL (faulty/dirty MAF, vacuum leak are among the most common). In your case the O2 sensor was the fault.
MBWorld Fanatic!
Joined: Aug 2012
Posts: 3,398
Likes: 371
c63
Having the 2nd cat delete doesn't throw a CEL.
I wouldn't say this code means necessarily faulty O2 sensor. This is one of the probable causes but there are other scenario that could throw this CEL (faulty/dirty MAF, vacuum leak are among the most common). In your case the O2 sensor was the fault.
I wouldn't say this code means necessarily faulty O2 sensor. This is one of the probable causes but there are other scenario that could throw this CEL (faulty/dirty MAF, vacuum leak are among the most common). In your case the O2 sensor was the fault.
But yes you are correct there are multiply reason why this cel can come up
Senior Member
Joined: Feb 2009
Posts: 304
Likes: 0
From: Las Vegas
C63 & Mustang Mach1(s)
yeah mines tune related too..lean bank 1...the dealer said it's nothing to worry about...i asked jerry and he said to leave the battery unplugged over night and it fixes it so im going to try it tonight, btw do you have a reader? if so which one? ive been curious what ones work, the dealer here uses some MAC tools one for a handheld
Skeptical on the oxy sensor since mine came on right after the tune upgrade...coincidence I don't think so.
Will try the battery disconnect this weekend.
MBWorld Fanatic!
Joined: Sep 2013
Posts: 1,673
Likes: 4
From: Pittsburgh
C63 AMG
I am eurocharged with k&n filters and have had absolutely no issues whatsoever, not a single hiccup... KNOCK ON WOOD!
I did the charcoal delete and about passed out in my garage from the fumes, that and it actually changed the sound of the exhaust note a bit so I put them back in. I have never thrown a cel.
I have 43k miles on my car with about 500 miles on the tune.
How many miles are your cars, and how many of those miles are with tune?
I did the charcoal delete and about passed out in my garage from the fumes, that and it actually changed the sound of the exhaust note a bit so I put them back in. I have never thrown a cel.
I have 43k miles on my car with about 500 miles on the tune.
How many miles are your cars, and how many of those miles are with tune?
Thread Starter
Member
Joined: May 2010
Posts: 98
Likes: 0
C63 AMG 2009
Hi All, MB Greenway Plaza is where I always go and they have always been very cooperative. They believe it was the fuel pump which was replaced under warranty. Car is running fine now.
Thanks for all the responses!
Thanks for all the responses!
