zarif

hi, i am new the mercedes, i purchase this mercedes c180 w203 petrol 2002 model last year from a dealer. last week check engine light came up
on the dash board. the car was running bit rough after the light came on and it was not getting started on first sulf in the morning but if i
try second time it was fine. then it started to stall some time especially when the engine is cold. so i went to the Mercedes dealer B&M Care.
also called German autos based in Leeds they are the mercedes specialist. they identified the below faults in my car.
1. CAM shaft sensor
2. CAM Solenoid
3. Air Mass sensor
4. Centre Cap
5. Purge Valve
they give me a quote of 1000£ approximately to solve these issue. my question is how it is possible to have all these problem in one day. is it possible
that the problems were there in my car before but it just appears now? also i have changed the CAM shaft sensor and Air MAss sensor my self and the car
is starting fine now as well as it is running much smooth in terms of performance but check engine light is still there. so as i have already spend quite
lot of money to put these sensors so will putting purge valve and CAM solenoid solve the check engine light issue?
last night when local mechanic tried to reset my check engine light as i replace the CAM shaft sensor and Air Mass, he was unable to erase the errors
from the computer. but after the unplugging computer the check engine light was gone but after one hour it came back up.
can any body help me to find out the problem i will be very thankful to you.

cm60k

C180 is good & simple car, i don't think it's worth to spend 1000£ to solve these issues..!,

did you feel your car losing power or hard/long start...??

ZAYED,,

zarif

thanks cm60k. the car is running better it is not losing power or not stalling at all at the moment but when i push the pedal/gass it is not picking up the speed straight away. it takes bit of time say 2-3 seconds. it also running in Lim Home mode as the check engine light is on. i am not sure what is Lim Home Mode.

ok just went to the local mechanic again but better one this time and he plug inn the computer and forcefully reset all the codes just to check the main issue. after force reset the check engine light went off but came back straight away as soon as he start the engine second time not the first time as it was fine first time.

he plugged inn the machine/computer again and this time it records only one issue and it was CAM shaft position sensor but i have changed the CAM shaft position sensor yesterday so any body have a clue what is the issue please?

cm60k

"Throttle body/Maf sensor/gear speed sensor that located in Electric conductor plate in the Valve body/TCU/oil sneaks inside TCU",,

all these things could causes limp home or limp mode...!

ZAYED,,

zarif

thanks cm60k but is that mean,the machine/computer is recording the wrong fault as it is coming up as CAM shaft position sensor fault which i have just replaced yesterday?

is it wroth plugging inn the machine after couple of days, it might bring up some more faults. but at the moment it looks like some thing around/linked with CAM shaft position sensor is it make sense?

cm60k

Welcome mate,

If you replace the cam sensor, you should to reset the system via the ECU, to delete the cam sensor fault code,,

if you not reset the system, cam sensor code will stay in the ECU memory...

ZAYED,,

zarif

thanks cm60k. sorry about my little knowledge about the cars, so when i said mechanic plugged in computer/machine i mean the OBD error code reader machine or error code reader i do not know the exact name which basically identify the faults and the mechanic had erased all the faults in the afternoon which means check engine light was reset initially but it came back again after 2 5 minutes.

is there any special way to delete the fault code from ECU when you replace CAM shaft position sensor?

cm60k

Do you know if your mechanic using MB STAR diagnostic tool or aftermarket one..?,

you can disconnect the battery for about 1 hour or whole night,,

then reconnected...

ZAYED,,

zarif

thanks cm60k. i think he is using afetrmarket tool. it is definitely not the MB start one as i heard that for MB star is very expensive and normally MB dealer or Specialist have those.

is it easy to disconnect the battery or do i need to follow some procedures?
as i was reading on the forum and some people have issues while disconnecting the batteries.

Thanks once again for you time and knowledge.

cm60k

Any Time,,

no problem disconnecting battery, while your car doesn't has any issues,

i prefer to use MB STAR/SDS, it's more accurate for DAS/DATA coding,,

many shops got it...

ZAYED,,

zarif

Thanks cm60k, let me find some one with MB star diagnostic system or some one reliable to disconnect my battery. i will come back to you in both cases just to get an opinion thanks mate.

cm60k

....

ZAYED,,

zarif

hi, any idea what is purge valve mean as initially they identified that my purge valve need to be replaced as well. is there any connection between purge valve and CAM shaft sensor. also my car did not start in first self/ignition today, it started in second self/ignition but it is running better.
any idea?

cm60k

Purge valve is a part of evaporative emission system, it's opens when commanded to pull fuel vapors out of the canister, goes to intake manifold to burn it,



purge valve doesn't has anything with cam sensor..!,,

delay or bad starting, could cause from bad or dirty injectors/fuel filter/ fuel pressure regulator/clogged fuel lines...

ZAYED,,

zarif

thanks cm60k. MB dealer has serviced my car 1000 miles ago. it was service B which mean they have changed the filters but i have no idea which filter they have changed.

cm60k

You also may have a beginning of bad CPS sensor...!



ZAYED,,

zarif

is the CPS means CAM Position Sensor, it looks different to the one which i have replaced couple of days before.

cm60k

No, it's Crank Position Sensor, located at the back of the Engine,

if you not change it before, i'm Highly recommended to replace it, even if it not the reason of delay starting,

it's effective directly to starting & perform of the Engine,,

so many video's here:

http://www.youtube.com/results?searc...osition+sensor

ZAYED,,

zarif

so just went to mechanic now and he plugged inn the OBDII error code reader and it comes up with below faults


P2014 Y49 Adjustment Cam Shaft Timing Solenoid
P2016 Y58/1 Purge Valve Control
P2018 Y32 Air Pump Switch over Valve
P2022 Heating 3/2 O2 Sensor Upstream KAT
P2023 Heating 3/1 O2 Sensor Downstream CAT

CAMSHAFT Postion sensor fault is not coming up any more. as the mechanic advised me last week that i need to run the car 2-3 days so to get real faults codes.

any idea why all these faults coming up? any idea how to check O2 sensor and Air Pump

Thanks

cm60k

What kind of OBDII he using.?, did he trying to erase the codes..?, if so, did they come back...???

ZAYED,,

zarif

i am not sure what kind of OBD he is using but he had erased the codes couple of days before but now they came again. so some thing is clearly not right. it looks like one part is going wrong causing multiple parts failure.

cm60k

If same these codes returns back, doesn't means you have to change them all, maybe their connection not fitted well, or need to clean them,,

is purge valve doing ticking sound, is there any kind of cracking in 2 hoses...?

ZAYED,,

zarif

it might be i need to change all the parts. purge valve is not giving any ticking sound. i have cleaned it as well but still not ticking it is taking less power than expected. i thinking it is taking 26 OM but i believe it should be taking more. hoses/pipes looks fine.

but i am really surprised that why all these parts come up faulty in one go. as i have changed the CAM Shaft sensor and Air Flow Meter/MAF.

cm60k

My friend got same your C180, his ECU deduct purge valve & o2 sensors, after erase them though STAR, only purge valve return back, o2 sensors never comes back,

as i know; cam sensor & cam solenoid not easy to be damaged,

you can get an used purge valve & cam solenoid to see if ECU will deduct them again, but before spending $$$, prefer to diagnose your can via STAR/SDS,,

cause it's more accurate & reliable for MB codes...!

ZAYED,,

zarif

i am really thankful to you mate. i am going to buy used purge valve as the new one is too expensive and i will let you know the result.