jasoncdoll

Recently purchased a 2010 C63. The car began throwing Traction Control Unavailable warnings, occasionally at first, and then with increasing frequency. The car goes into limp mode when it happens. It can be temporarily alleviated with a stop and reset. At some point the check engine light came on. My trusted mechanic put his reader on and found these error codes:

1916 Stored The inlet manifold pressure sensor is faulty.
1061 Current & Stored Torque limitation or shutoff of the combustion engine has been triggered by the torque control system.
2313 Stored The torque calculation of the control module is faulty.

My mechanic believes the engine is driving the Traction Control Error warning and the switch to limp. He thinks it's a faulty intake manifold heater, and will likely require replacement of the entire intake manifold ($$$$). There is a technical bulletin out there on this very matter.

Side note: The car has often been idling very high...like 1500-1800 RPM, especially after a good pull or two.

Has anybody else any similar experience?

I welcome any experienced interpretation of the codes, as I know these complex cars don't always say specifically what they mean.

Thanks in advance.

dcpatters

After reaching operating temperature and driving around a bit, what is the idle RPM and ignition timing? How many miles on the car?

hachiroku

do you know if the vehicle has been tuned? the torque calculation is done within the engines computer for the most part. traction control i believe is handled through the body computer, but i'd defer to a mercedes technician for further details on that.

jasoncdoll

It has been idling high after warming up, like 1500-1800 RPM. It idles under 1000 when first started up. Not sure what you mean by ignition timing. The car has 120K on it.

jasoncdoll

No tune on the car to my knowledge.

hachiroku

if no tune, your engine or body control computer might be failing is my guess. maybe a firmware update is available that may help?

dcpatters

Sounds like leaking intake manifold and / or throttle body plate. My C63 would ilde at ~1100 RPM, oscillating up and down. With a decent ODBII dongle and App (Torque, etc) you can monitor ignition timing. If it's negative, intake is leaking.

How do I know this, I just had mine replaced.

Also, I agree with Barry. Possibly be a tune issue. Improper Torque limiters.

hachiroku

mine has a small leak also. . guess I have to install those 82mm throttle bodies I have been holding onto.

jasoncdoll

dcpatters, did you have your throttle body replaced, or the intake manifold?

dcpatters

Unfortunately, I hit the trifecta. PCV breather hose was leaking, and both intake manifold and throttle body were deteriorated. All 3 replaced.

jasoncdoll

dcpatters, Ouch! That had to be spendy! Sorry you got dinged for all that. Did it at least fix the problem?

dcpatters

All good now. Engine runs flawless. For now at least.

jasoncdoll

I ended up having to have the intake manifold and crank case vent valve replaced, so I feel your pain. That said, my AMG runs like a banshee now.

roadkillrob

What ended up being wrong with the intake manifold, was it the typical deterioration of the magnesium allowing the throttle plate to leak and or an external leak due to corrosion or something more? Just curious.