m276 cam timing code: P001985
Thread Starter
Newbie
Joined: Apr 2021
Posts: 4
Likes: 0
CLS350
m276 cam timing code: P001985
Hi.
I have a Mercedes CLS350 with the engine code M276.952. The check engine light is on, and its coming up with the code P001985.
I have changed 2 x camshafts, 2 x camshaft adjusters 2x solenoid in the left side and planted the oil check valves in both sides and changed chain tensioner in both sides. i havent changed the chain because it seems tight and fine. I have adjusted the timing with the special tool. But as soon as i start the car it runs fine in 1-2 minutes and then the camshaft position changes by itself in the left exhaust side. Any ideas what it can be? it makes me crazy. I have disassembled it all and reassembled it again 3 times now...
Anyone??
I have a Mercedes CLS350 with the engine code M276.952. The check engine light is on, and its coming up with the code P001985.
I have changed 2 x camshafts, 2 x camshaft adjusters 2x solenoid in the left side and planted the oil check valves in both sides and changed chain tensioner in both sides. i havent changed the chain because it seems tight and fine. I have adjusted the timing with the special tool. But as soon as i start the car it runs fine in 1-2 minutes and then the camshaft position changes by itself in the left exhaust side. Any ideas what it can be? it makes me crazy. I have disassembled it all and reassembled it again 3 times now...
Anyone??
Last edited by kaank; Apr 8, 2021 at 06:19 AM.
Out Of Control!!
Joined: Sep 2018
Posts: 14,668
Likes: 4,570
From: unbegrenzt
2017 GLE350 4MATIC
Hi.
I have a Mercedes CLS350 with the engine code M276.952. The check engine light is on, and its coming up with the code P001985.
I have changed 2 x camshafts, 2 x camshaft adjusters 2x solenoid in the left side and planted the oil check valves in both sides and changed chain tensioner in both sides. i havent changed the chain because it seems tight and fine. I have adjusted the timing with the special tool. But as soon as i start the car it runs fine in 1-2 minutes and then the camshaft position changes by itself in the left exhaust side. Any ideas what it can be? it makes me crazy. I have disassembled it all and reassembled it again 3 times now...
Anyone??
I have a Mercedes CLS350 with the engine code M276.952. The check engine light is on, and its coming up with the code P001985.
I have changed 2 x camshafts, 2 x camshaft adjusters 2x solenoid in the left side and planted the oil check valves in both sides and changed chain tensioner in both sides. i havent changed the chain because it seems tight and fine. I have adjusted the timing with the special tool. But as soon as i start the car it runs fine in 1-2 minutes and then the camshaft position changes by itself in the left exhaust side. Any ideas what it can be? it makes me crazy. I have disassembled it all and reassembled it again 3 times now...
Anyone??
8 connectors:
4 cam position sensors
4 cam solenoids/magnets
These can fail, allowing oil into the harness and the oil can migrate into the ECU giving intermittent contact and erratic behavior.
Thread Starter
Newbie
Joined: Apr 2021
Posts: 4
Likes: 0
CLS350
Checked all connectors - nothing to see. Its dry.
i found out that the last owner has been driving with the engine light on for a while. Could it be because the self adaption values need to be reset with a star diagnose tester?
i found out that the last owner has been driving with the engine light on for a while. Could it be because the self adaption values need to be reset with a star diagnose tester?
Thread Starter
Newbie
Joined: Apr 2021
Posts: 4
Likes: 0
CLS350
With everything you've done, I would replace the sensors. Maybe that is just me but it's fairly cheap. https://www.youtube.com/watch?v=2cFxijdblH4
