SLK/R170: 2001 SLK230 w/ P0243 & P0410 Codes - Still Cannot Fix! HELP!
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Joined: Feb 2008
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1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
2001 SLK230 w/ P0243 & P0410 Codes - Still Cannot Fix! HELP!
I am working on a 2001 SLK230 with my father and we have been pulling our hair out trying to resolve a CEL. The codes are P0243 (Wastegate Solenoid A Malfunction) and a P0410 (Secondary Injection System).
So far, we have done the following to the car:
- Cleaned MAF
- Verified all clamps are tight and no cracks in piping
- Replaced Recirculating Air Flap ( AKA Air Bypass Valve)
- Replaced Secondary Injection Check Valve (PITA)
We cleared the codes, drove the car for about 60 miles and the CEL came back on throwing the exact same codes. We cannot get this car smogged unless we resolve this once and for all. Previous searches here have revealed that leaking cam sensors can cause all sorts of electrical problems. We have inspected the sensor and the wiring and found no traces of oil (thank God). Are there any other options I am missing? One big one is that we aren't sure if we did the air flap learning procedure correctly.
So far, we have done the following to the car:
- Cleaned MAF
- Verified all clamps are tight and no cracks in piping
- Replaced Recirculating Air Flap ( AKA Air Bypass Valve)
- Replaced Secondary Injection Check Valve (PITA)
We cleared the codes, drove the car for about 60 miles and the CEL came back on throwing the exact same codes. We cannot get this car smogged unless we resolve this once and for all. Previous searches here have revealed that leaking cam sensors can cause all sorts of electrical problems. We have inspected the sensor and the wiring and found no traces of oil (thank God). Are there any other options I am missing? One big one is that we aren't sure if we did the air flap learning procedure correctly.
Thread Starter
Member
Joined: Feb 2008
Posts: 224
Likes: 24
1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
UPDATE: I have replaced the K40 relay that Mercedes now calls Engine Management Relay as of 2001+. I am still getting a CEL. If anyone is reading this please help.
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Joined: Oct 2016
Posts: 13
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From: Stockholm
MB SLK 230 year 2000/05 facelift
Look so the line from engine to the PCV dont are clogged. Try squirt som brake cleaner after the PCV valve and see what happens.
Also try to reset the bypassvalve,
1) turn ignition to off and push valve to fully close position in 5 seconds
2) turn ignition on for 15 seconds and you can hear the valve close
3) turn igintion off for 45 seconds.
Then you are done.
If not working. Try dissconnect negative battery for 15 minutes to reset the ECU fuel trims, and reconnect battery and let car idle for 5 minutes. Then read codes with engine off, clear codes and turn ignition off in 3-5 seconds. Then start the car and drive.
Hopefully this helps.
/Fredrik
Also try to reset the bypassvalve,
1) turn ignition to off and push valve to fully close position in 5 seconds
2) turn ignition on for 15 seconds and you can hear the valve close
3) turn igintion off for 45 seconds.
Then you are done.
If not working. Try dissconnect negative battery for 15 minutes to reset the ECU fuel trims, and reconnect battery and let car idle for 5 minutes. Then read codes with engine off, clear codes and turn ignition off in 3-5 seconds. Then start the car and drive.
Hopefully this helps.
/Fredrik
Thread Starter
Member
Joined: Feb 2008
Posts: 224
Likes: 24
1987 Porsche 928 S4, 2009 Mercedes E350, 2011 Mercedes GL450, 2003 Mercedes ML350
Car was wrecked before I could comment on the fix. There was crack in the intercooler causing the boost to leak. Previous owner damaged the car.
This car has been written off and replaced with a VERY WELL RUNNING 2002.
This car has been written off and replaced with a VERY WELL RUNNING 2002.
