C-Class (W203) 2001-2007, C160, C180, C200, C220, C230, C240, C270, C280, C300, C320, C230K, C350, Coupe

Got "Check Engine" light, any guesses?

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Jun 30, 2003 | 12:11 AM
  #1  
preyx's Avatar
Thread Starter
Super Member
 
Joined: Jun 2002
Posts: 577
Likes: 0
From: Orange Co., CA, USA
'02 C230K Coupe
Got "Check Engine" light, any guesses?

While driving home from my friend's house last Thursday, the "Check Engine" light lit up. I scheduled an appointment for Tuesday afternoon, so I don't know what the problem is yet. The car seems to be driving normally, and I'm about 900 miles from a Service A (with my odometer at around 33100 mi). The only guess that I have is that the coolant may be low, since the temp fluctuates within a +- 4C range, nothing critical, but still noteworthy. Anyways, if anybody is familiar with the warning light, and could venture a few guesses to the problem, I'd appreciate it. I'll report back when I hear what the dealer found.
Reply
Old Jun 30, 2003 | 12:16 AM
  #2  
Harris's Avatar
MBWorld Fanatic!
 
Joined: Jan 2002
Posts: 4,439
Likes: 1
Guess 1: didnt turn the fuel cap properly
Guess 2: air pump
Guess 3: mass air flow sensor

Should be one of the three above!
Reply
Old Jun 30, 2003 | 01:21 AM
  #3  
rrf's Avatar
rrf
Super Member
 
Joined: Mar 2002
Posts: 711
Likes: 1
Coolant problems would normally be reflected in coolant level and that is a separate error.

Maybe add O2 sensor problem to the list above. My guess is #2 though.
Reply
Old Jun 30, 2003 | 01:24 AM
  #4  
FIXEDupW209's Avatar
MBWorld Fanatic!
 
Joined: Jan 2003
Posts: 2,488
Likes: 0
A bucket on wheels
9 out of 10 times its the fuel cap....mercedes warns that if its not properfaly tightened the light will come on and the car will need to be brought in to turn it off...my guess its that and guaranteed thats the first thing they are gonna ask you and check.
Reply
Old Jul 2, 2003 | 08:15 AM
  #5  
viper's Avatar
Super Member
 
Joined: Dec 2001
Posts: 756
Likes: 1
From: Canada
The coolant temperature sensor is a known problem. This will turn on your check engine light if it is faulty. You also mention a temperature fluctuation so it points in this direction.
Reply

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


You have already rated this thread Rating: Thread Rating: 0 votes,  average.


All times are GMT -4. The time now is 06:22 PM.

story-0
New Electric Mercedes-AMG GT 4-Door Coupe Unveiled: 10 Things You Need to Know

Slideshow: Mercedes-AMG's new electric GT 4-Door Coupe trades combustion for software, synthetic noise, and more than 1,100 horsepower.

By Verdad Gallardo | 2026-05-20 20:08:15


VIEW MORE
story-1
6 Mercedes Models That Did NOT Age Well (But Are Somehow Still Cool)

Slideshow: Not every Mercedes design becomes timeless, some feel stuck in the era they came from.

By Verdad Gallardo | 2026-05-12 18:09:07


VIEW MORE
story-2
Manual Mercedes? 6 Times Sindelfingen Let Drivers Have All The Fun

Slideshow: Yes, Mercedes built manual cars, and some of them are far more interesting than you'd expect.

By Verdad Gallardo | 2026-05-02 12:36:58


VIEW MORE
story-3
Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

Slideshow: A one-of-one U.S.-spec Mercedes-Benz SLR McLaren Roadster became even rarer after a factory-backed transformation at McLaren's headquarters.

By Verdad Gallardo | 2026-04-29 11:19:28


VIEW MORE
story-4
8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

Slideshow: Before curves took over, Mercedes mastered the art of the straight line, and some of those shapes still look right today.

By Verdad Gallardo | 2026-04-25 12:05:49


VIEW MORE
story-5
Flawlessly Restored Mercedes 190E Evo II Heads to Auction

Slideshow: The 190E Evolution II shows how a homologation necessity became a six-figure collector icon.

By Verdad Gallardo | 2026-04-22 17:53:47


VIEW MORE
story-6
Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

Slideshow: Mercedes is turning one of its core nameplates electric, and the details show just how serious this shift is.

By Verdad Gallardo | 2026-04-21 13:58:06


VIEW MORE
story-7
Mercedes EQS Gets A Major Update: Everything You Need to Know

Slideshow: Faster charging, longer range, and a controversial steer-by-wire system define the latest evolution of Mercedes-Benz EQS.

By Verdad Gallardo | 2026-04-15 10:35:34


VIEW MORE
story-8
5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

Slideshow: These overlooked Mercedes-Benz models never got the spotlight, but they quietly delivered more than most remember.

By Verdad Gallardo | 2026-04-13 19:35:45


VIEW MORE
story-9
Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

Slideshow: A well-used 1991 Mercedes-Benz 300D with more than one million miles is now looking for a new owner, and it still appears ready for more.

By Verdad Gallardo | 2026-04-10 10:05:15


VIEW MORE