C-Class (W204) 2008 - 2014: C180K, C200K, C230, C280, C300, C350, C200CDI, C220CDI, C320CDI

C350 2009 error code

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old Dec 20, 2017 | 02:11 AM
  #1  
Cruel-Merc's Avatar
Thread Starter
Member
 
Joined: May 2014
Posts: 214
Likes: 3
From: Lebanon
2009 C350
C350 2009 error code

Hello folks, i plugged in my obd scanner this morning and it threw me an error code P0521 says oil sensor / performance tho theres no CEL light on the dash. Any idea what is it ? Thank you.
Reply
Old Dec 20, 2017 | 02:16 AM
  #2  
Narry's Avatar
Former Vendor of MBWorld
 
Joined: Oct 2014
Posts: 152
Likes: 2
From: hongkong Shenzhen
C260
Smile

Originally Posted by Cruel-Merc
Hello folks, i plugged in my obd scanner this morning and it threw me an error code P0521 says oil sensor / performance tho theres no CEL light on the dash. Any idea what is it ? Thank you.
hihttps://www.youtube.com/watch?v=6TvX1jJ33Bc
check this youtube video
Reply
Old Dec 20, 2017 | 02:24 AM
  #3  
Cruel-Merc's Avatar
Thread Starter
Member
 
Joined: May 2014
Posts: 214
Likes: 3
From: Lebanon
2009 C350
Originally Posted by Narry
hihttps://www.youtube.com/watch?v=6TvX1jJ33Bc
check this youtube video
Well, i did a new oil change + filter around a month ago and now i check the oil level and its all good, it hit the Max mark.
Reply
Old Dec 22, 2017 | 01:33 PM
  #4  
Cruel-Merc's Avatar
Thread Starter
Member
 
Joined: May 2014
Posts: 214
Likes: 3
From: Lebanon
2009 C350
I eventually fixed this issue with replacing the engine manifold due to broken tumble flap Actuator. It had nothing to do with oil sensor, it seems the obd has a different code description from xentry.

Last edited by Cruel-Merc; Dec 24, 2017 at 03:49 AM.
Reply
Old Dec 24, 2017 | 03:20 AM
  #5  
Narry's Avatar
Former Vendor of MBWorld
 
Joined: Oct 2014
Posts: 152
Likes: 2
From: hongkong Shenzhen
C260
Smile

Originally Posted by Cruel-Merc
I eventually fixed this issue with replacing the engine manifold due to broken tumble flap Actuator cost. It had nothing to do with oil sensor, it seems the obd has a different code description from xentry.
hi
that exactly how modern cars are all ecu engine abs tcu gear box are interconnected to each other some times it can give you wrong codes
once i get vw golf 6 it had error code saying boost pressure engine sensor have some problems when i scan the whole car it show me back door light is bad
i told my friend to go to vw workshop to repair it do you know they said that needed change the turbo cost 1500 usd car was driving ok not in limp mode
do know when we changed back door bulb ourself and delete the code all is ok no problems cars have become modern mechanics don't understand the electronic nothing
but can say we are very professional
narry
Reply
Old Dec 24, 2017 | 02:40 PM
  #6  
Moto_Guzzi's Avatar
Super Member
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Nov 2008
Posts: 604
Likes: 29
From: SA
2008 C350-Sport-AMG-Active Agility Pack(Not reliable) +Izuzu KB6 3L(It seems Reliable)+Mazda
About wrong codes: I am a bit confused as to the origin of the wrong analysis...

1-was the wrong code due to a bug in Mercedes W204 software on the car-?

2-was the wrong code due to a bug on your tester used-?

3-was the wrong code due to incorrect data sets on the tester you used-?
Reply
Old Dec 24, 2017 | 04:38 PM
  #7  
Cruel-Merc's Avatar
Thread Starter
Member
 
Joined: May 2014
Posts: 214
Likes: 3
From: Lebanon
2009 C350
Originally Posted by Moto_Guzzi
About wrong codes: I am a bit confused as to the origin of the wrong analysis...

1-was the wrong code due to a bug in Mercedes W204 software on the car-?

2-was the wrong code due to a bug on your tester used-?

3-was the wrong code due to incorrect data sets on the tester you used-?
Well, the code (p0521)was the same on both xentry and obd but just different description.
Reply
Old Dec 24, 2017 | 05:07 PM
  #8  
w204_racing's Avatar
MBWorld Fanatic!
 
Joined: Oct 2017
Posts: 1,252
Likes: 35
C300 sport 2008
Originally Posted by Cruel-Merc
I eventually fixed this issue with replacing the engine manifold due to broken tumble flap Actuator. It had nothing to do with oil sensor, it seems the obd has a different code description from xentry.
A

Last edited by w204_racing; Jan 3, 2018 at 07:12 PM.
Reply
MB World Stories

The Best of Mercedes & AMG

story-0

Mercedes SLR McLaren 722 S Is Extremely Rare Example Modified by McLaren

 Verdad Gallardo
story-1

8 Classic Boxy Mercedes Designs That Have Aged Like Fine Wine

 Verdad Gallardo
story-2

Flawlessly Restored Mercedes 190E Evo II Heads to Auction

 Verdad Gallardo
story-3

Electric Mercedes C-Class Unveiled: 11 Things You Need to Know

 Verdad Gallardo
story-4

Mercedes EQS Gets A Major Update: Everything You Need to Know

 Verdad Gallardo
story-5

5 Underrated Mercedes-Benz Models That Don't Get the Love They Deserve

 Verdad Gallardo
story-6

Mercedes 300D Has Pushed Well Past 1 Million Miles and It Ain't Stopping

 Verdad Gallardo
story-7

10 Most Reliable Mercedes-Benz Models You Can Buy Used

 Verdad Gallardo
story-8

Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke

 Verdad Gallardo
story-9

8 Mercedes Models With Poor Reliability Records

 Verdad Gallardo
Old Dec 25, 2017 | 09:40 AM
  #9  
Narry's Avatar
Former Vendor of MBWorld
 
Joined: Oct 2014
Posts: 152
Likes: 2
From: hongkong Shenzhen
C260
Smile

Originally Posted by Moto_Guzzi
About wrong codes: I am a bit confused as to the origin of the wrong analysis...

1-was the wrong code due to a bug in Mercedes W204 software on the car-? can be one million reasons

2-was the wrong code due to a bug on your tester used-? he is using original xentry which Mercedes offfical tools

3-was the wrong code due to incorrect data sets on the tester you used-?
this question Mercedes benz Germany can answer
if you want my answer is simple modern cars all is interconnected engine ecu to abs ecu to all other ecu all are connected if one ecu or wiring gets affected it can trigger a code which may not be related to the actual problems
narry
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 07:01 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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
story-7
10 Most Reliable Mercedes-Benz Models You Can Buy Used

Slideshow: From bulletproof sedans to surprisingly tough SUVs, these Mercedes models proved that the three-pointed star can go the distance.

By Verdad Gallardo | 2026-04-08 09:55:49


VIEW MORE
story-8
Mercedes Teases Updated EQS With Steer-By-Wire and a Yoke

Slideshow: The 2027 update adds a fully digital steering system, revised styling, and potential charging upgrades as the company looks to revive interest in the luxury EV.

By Verdad Gallardo | 2026-04-04 10:24:38


VIEW MORE
story-9
8 Mercedes Models With Poor Reliability Records

Slideshow: From problematic air suspensions to early dual-clutch transmission issues, these specific models and years stand out as the least dependable modern Mercedes vehicles.

By Verdad Gallardo | 2026-03-26 18:08:10


VIEW MORE