2003 S600

Had dealer run codes and diagnose, boost and tranny codes came up: P2001-- [Charge pressure too low] and P2318-- [One or more messages from control unit N15/5 (Electronic selector lever module control unit) are not available on the CAN bus. (CAN timeout fault)] ---both current and stored. Anyone know what I need to do? I found out why boost was low--right wastegate rod nut was gone and wastegate stuck open. What is this P2318 code? Shifter bad? Or what?

Ausmbtech

Code P2318 is just one of those codes that show up from time to time, it's not relivant unless you have a problem with the shift lever. Just erase it.

2003 S600

Thanks, but could it cause my car to upshift when trying to floor it from a start. I often cannot spin the wheels from a start even with ESP off due to an apparent upshift. Happens in any mode C,S, or M-- yes I have AMG like speedshift with Kleemann ECU and TCU. I do the ECU reset(sneaky) and it sometimes helps but not much, still feels like trany is upshifting when I take off. What could be the problem?

Ausmbtech

Something is definately wrong if you can't wheelspin with ESP off with a 600 engine. The fault code won't be related but something isn't right.

Do it make a difference if the car is cold or hot? Intercooler pumps are a common failure that isn't as easily noticed on a V12 as it is on the V6 and V8's

2003 S600

cold or hot no difference, intercooler pump is fine, I can see pump working with my clear intercooler hoses. ECU reset works sometimes, and can spin wheels, but sometimes cant. Maybe valve body or electric plate in trany?

Ausmbtech

I think it would be worth a visit to a good dealer or a very good independant mechanic. Without looking at the car myself it's very hard to diagnose without other fault codes.

I would suspect and engine related problem because if you had a valvebody or electrical plate problem you would have other fault codes and also wouldn't have all 5 gears which you would notice even with a V12. Either low boost pressure (either actual low boost pressure or engine in limp mode) or a misfire/coil pack/ignition module fault.

2003 S600

Already did that, thats how i got these codes read. I do get the p0730 sometimes when engine goes into neutral off of a wot. I removed the electrical connector for trany and there was fluid in there. cleaned it out and put back. maybe that will help.

Ausmbtech

P0730 is the transmission detecting slipage internally. This is usually caused by low oil level. Have you checked the oil level?

On very rare occasions the sensor ring breaks away from clutch carriers and needs to be replaced (transmission disassembled)

If you oil level is ok. you haven't changed the transmission ecu recently, you haven't changed the diff ratio and you haven't changed the wheels to something that has a different rolling diameter between the front and rear then you will probably need a transmission overhaul.

2003 S600

level is at top of 80*C mark, I do have 275s in the back, stock is 265s, is that significant? kleemann tuned tcu but not a new tcu. only throws that code when it flips to neutral after a wot and let off throttle.

Ausmbtech

That tyre size difference won't do it. Hard to tell if your tuned TCU is part of the cause. Has it only recently started doing this or only since the tune?

If it's only just started doing this then I'm suspecting a damaged sprag clutch or a valvebody fault (low oil pressure(internal leak)/sticking valve) but it's hard to tell without driving and checking over your car. I think best to leave it at your dealer or indy and get it sorted.