Got a SERIOUS problem. p001985 error code
Thread Starter
Senior Member
Joined: Nov 2013
Posts: 323
Likes: 4
From: Los Angeles, CA. USA
2013 c250
Got a SERIOUS problem. p001985 error code
This is for my 2013 E350 Coupe. Last week the oil filter gave out, oil everywhere. Fine, take it in to an indy- he says error codes say to replace the cam magnets. Fine, replace both I say. At the time, there was a "click, click click" sound towards the back of the engine (closest to the windshield). Now there's PROBLEMS- car takes 5 seconds to start- sometimes doesn't. Car's acceleration is crap in 1st, 2nd gear. Check engine light still on- the error P001985 says it's "implausible signal relative to position of the crankshaft." Is it something simple like replacing crank sensor or something major like a timing belt issue? I've replaced one in a 2005 c230. Not sure what to do here but mechanic said there's no outstanding recalls on this.
Last edited by scottonfire; Sep 3, 2017 at 07:14 PM.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
P001985 = position of the exhaust camshaft cylinder bank 2, lower driver side looking into engine bay. Note bank 1 passenger side, bank 2 driver side; intake solenoid upper, exhaust lower If any solenoid is found to be old part # I suggest replacing all four to current # see attachment. Have independent revisit, first step check harness to solenoids then move on from there.
Thread Starter
Senior Member
Joined: Nov 2013
Posts: 323
Likes: 4
From: Los Angeles, CA. USA
2013 c250
P001985 = position of the exhaust camshaft cylinder bank 2, lower driver side looking into engine bay. Note bank 1 passenger side, bank 2 driver side; intake solenoid upper, exhaust lower If any solenoid is found to be old part # I suggest replacing all four to current # see attachment. Have independent revisit, first step check harness to solenoids then move on from there.
Out Of Control!!
Joined: Jul 2003
Posts: 15,901
Likes: 4,630
From: North Scottsdale, AZ
'71 Pinto
Unfortunately, you have no choice but to take independent’s advice. Expensive second opinion but if it is found to be independent’s error …well you know the rest. Also, reference attached bulletins to dealer. Jumping ahead if 054702 is applicable (engine # within affected range), request MB goodwill repair since parts were modified to correct defective parts installed at production.
Thread Starter
Senior Member
Joined: Nov 2013
Posts: 323
Likes: 4
From: Los Angeles, CA. USA
2013 c250
Unfortunately, you have no choice but to take independent’s advice. Expensive second opinion but if it is found to be independent’s error …well you know the rest. Also, reference attached bulletins to dealer. Jumping ahead if 054702 is applicable (engine # within affected range), request MB goodwill repair since parts were modified to correct defective parts installed at production.
