Coolant- Visit workshop

Andyjefferies

New Member
Joined
Oct 22, 2020
Messages
6
Location
Gloucester
Car
2002 C220 cdi
Hi, as a new member to this forum, i am trying to possibly get some information regarding my mercedes problem.
i have a 2002 C220 cdi which i have had for a few years now with no major problems and has driven absolutely fine.
about a week ago, i started the car and immediately it flashed up with 'Coolant-Visit Workshop' on my dash and the engine fan cut in straight away. The car had gone into Limp made, but luckily i was at home so switched car off straight away.
I checked coolant, coolant sender and coolant temp gauge and all were fine, so i called RAC out to do a diagnostic test, and here are the results:
IMG_20201019_184834_resized_20201022_095230850.jpg

The RAC man didn't really understand the codes, so couldn't really tell me anything constructive, so i have created this post hoping someone out there can maybe help. I would happily spend up to £1000 to get this problem sorted, as i really like the car.
Thankyou, awaiting replies.
 

steveq

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Nov 2, 2011
Messages
334
Location
Dublin
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2011 S212 E220 CDI Estate, 2011 W204 C220 CDI, 1965 230SL Pagoda
With all those codes and when they cover a number of different areas, I would suspect that your battery has low voltage.
One of the errors does mention low voltage.

Is your battery low? Is it old? Can you check it?
 
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Andyjefferies

Andyjefferies

New Member
Joined
Oct 22, 2020
Messages
6
Location
Gloucester
Car
2002 C220 cdi
With all those codes and when they cover a number of different areas, I would suspect that your battery has low voltage.
One of the errors does mention low voltage.

Is your battery low? Is it old? Can you check it?
Battery is fine, Steve, showing full power on test
 

wrdcc01

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Mar 23, 2008
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164
Location
Crystal Palace
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1994 W124 E280 saloon M104.942 4s-auto, 72 Hillman Hunter GLS, 71 GPO Minor LCV.
Some of these codes don't match the Mercedes definitions so wouldn't take the RAC result at face value. Maybe worth disconnecting the battery giving it an overnight charge and see what happens. It may automatically clear some of the reports and at least it's a no cost start. That variety of issues needs to be checked by an independent or dealer as the NOX sensor (one of the wrong code descriptions) is not cheap, neither is the steering angle sensor. Half your budget just on those new from MB if needed.
 

GP801

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Sussex and Tuscany
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2003 W209 CLK, 2005 R171 SLK in UK, 1995 S124 E280 in Italy
This might be of help. Our CLK 2003 vintage but petrol had this warning come up last year. All fluids and sensors were fine. Turns out the fan or its controller was faulty. This can also trigger a coolant warning. An Indie with Star will quickly sort out the cause
 

markjay

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W204 C180 Executive SE 2013 Automatic / COMAND NTG4.7 and Morel speakers fitted by www.comand.co.uk
Are these codes current or historic? It's not clear from the screen.

If historic, it may just be showing you all the crap that was accumulated over the years.

If current, you need to look at a common cause, if not the battery than perhaps the ECU etc.

Either way, get the car to a specialist with STAR.
 
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Andyjefferies

Andyjefferies

New Member
Joined
Oct 22, 2020
Messages
6
Location
Gloucester
Car
2002 C220 cdi
Are these codes current or historic? It's not clear from the screen.

If historic, it may just be showing you all the crap that was accumulated over the years.

If current, you need to look at a common cause, if not the battery than perhaps the ECU etc.

Either way, get the car to a specialist with STAR.
ok, thank you.
ivejust taken out the EGR valve, cleaned it and made sure it was operating ok. Put it all back together and nothing has changed.
Yes, I need to find someone with STAR in Bristol area
 
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Andyjefferies

Andyjefferies

New Member
Joined
Oct 22, 2020
Messages
6
Location
Gloucester
Car
2002 C220 cdi
Hi, as a new member to this forum, i am trying to possibly get some information regarding my mercedes problem.
i have a 2002 C220 cdi which i have had for a few years now with no major problems and has driven absolutely fine.
about a week ago, i started the car and immediately it flashed up with 'Coolant-Visit Workshop' on my dash and the engine fan cut in straight away. The car had gone into Limp made, but luckily i was at home so switched car off straight away.
I checked coolant, coolant sender and coolant temp gauge and all were fine, so i called RAC out to do a diagnostic test, and here are the results:
View attachment 103823

The RAC man didn't really understand the codes, so couldn't really tell me anything constructive, so i have created this post hoping someone out there can maybe help. I would happily spend up to £1000 to get this problem sorted, as i really like the car.
Thankyou, awaiting replies.

FURTHER TO THIS:
I have removed the EGR valve and rigorously cleaned and tested it for piston movement. Put it all back together and nothing has changed.
I really need to find someone with STAR diagnostics in Bristol area.
All help and answers greatly appreciated, thank you.
 

Uky

Active Member
Joined
Jun 23, 2006
Messages
218
Car
C207
Vehicles with similar DTC's (current - not old and stored) has in many cases had electric connectivity problems in the engine compartment. Not properly seated connectors. Moisture, oxidation, contact elements not properly locked into its housing, etc. Or simply not tightened battery pole or chassis gnd connectors.

If the engine fan runs at highest speed immedeately after crank, then it can be a case of lost CAN-bus communication between the fan and the engine management system in which the fan runs at highest speed in order to protect the engine from overheating, not getting any engine temperature data from the management system.
 
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Andyjefferies

Andyjefferies

New Member
Joined
Oct 22, 2020
Messages
6
Location
Gloucester
Car
2002 C220 cdi
Vehicles with similar DTC's (current - not old and stored) has in many cases had electric connectivity problems in the engine compartment. Not properly seated connectors. Moisture, oxidation, contact elements not properly locked into its housing, etc. Or simply not tightened battery pole or chassis gnd connectors.

If the engine fan runs at highest speed immedeately after crank, then it can be a case of lost CAN-bus communication between the fan and the engine management system in which the fan runs at highest speed in order to protect the engine from overheating, not getting any engine temperature data from the management system.
Thank you for that information, what would you suggest to remedy this ? Do you know where the fan controller is located please ?
 

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