Code o-rama
Thread Starter
Junior Member
Joined: Jul 2005
Posts: 16
Likes: 2
From: Central Coast California
2007 SLK 280, 2012 C350, 2012 C63 P31
Code o-rama
Hey all - picked up a 2012 C63 a few months back. 30k miles Immaculate and all service done at the dealer. Last week I tracked it and on the second lap, it went into Limp home mode. It was hot (about 100 degrees) but the thermostat did not show it was hot. No CEL. We checked for codes and nothing. Drove the car home 300 miles and everything was fine. Next day, driving leisurely and suddenly I get a major misfire.
Put the Carsoft on it and got the following:
- 0485 Cooling Fan Power/ground circuit malfunction
- 0629 misfire
-0641 cylinder 4 misfire
- 0653 cylinder 3 misfire
- 0633 cylinder 1 misfire
-1200 position exhaust cam bank 1
Do these suggest a thermo sensor and an O2 sensor? Are they related or is this just coincidental? Thoughts and suggestions appreciated
Put the Carsoft on it and got the following:
- 0485 Cooling Fan Power/ground circuit malfunction
- 0629 misfire
-0641 cylinder 4 misfire
- 0653 cylinder 3 misfire
- 0633 cylinder 1 misfire
-1200 position exhaust cam bank 1
Do these suggest a thermo sensor and an O2 sensor? Are they related or is this just coincidental? Thoughts and suggestions appreciated
MBWorld Fanatic!
Joined: Apr 2016
Posts: 4,765
Likes: 567
From: Milwaukee, WI
2010 C300 4MATIC........ 2011 C63 AMG.............. 2015 CLS400 4MATIC.....
Sometimes it's more complicated than the general forum users can help right away. Especially if many have not experienced it. Help will come.
MBWorld Fanatic!
Joined: Mar 2006
Posts: 4,278
Likes: 379
From: San Jose area
'19 E63S sedan
Hey all - picked up a 2012 C63 a few months back. 30k miles Immaculate and all service done at the dealer. Last week I tracked it and on the second lap, it went into Limp home mode. It was hot (about 100 degrees) but the thermostat did not show it was hot. No CEL. We checked for codes and nothing. Drove the car home 300 miles and everything was fine. Next day, driving leisurely and suddenly I get a major misfire.
Put the Carsoft on it and got the following:
- 0485 Cooling Fan Power/ground circuit malfunction
- 0629 misfire
-0641 cylinder 4 misfire
- 0653 cylinder 3 misfire
- 0633 cylinder 1 misfire
-1200 position exhaust cam bank 1
Do these suggest a thermo sensor and an O2 sensor? Are they related or is this just coincidental? Thoughts and suggestions appreciated
Put the Carsoft on it and got the following:
- 0485 Cooling Fan Power/ground circuit malfunction
- 0629 misfire
-0641 cylinder 4 misfire
- 0653 cylinder 3 misfire
- 0633 cylinder 1 misfire
-1200 position exhaust cam bank 1
Do these suggest a thermo sensor and an O2 sensor? Are they related or is this just coincidental? Thoughts and suggestions appreciated
Thread Starter
Junior Member
Joined: Jul 2005
Posts: 16
Likes: 2
From: Central Coast California
2007 SLK 280, 2012 C350, 2012 C63 P31
Thanks. Cleared the codes and will see what happens. If they reappear, I will change the sensor. Easy cheap fix. Too bad you can't swap left and right.
