Diagnostic codes 0763 and 0767 (Malfunction of Bank 1 & 2 Exhaust Cam Sensors)
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Joined: Feb 2022
Posts: 46
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From: Detroit and Killing Hemi's
2011 C63 AMG Eurocharged 93 tune, Agency power headers and Sect 1 mid, innotech ipe sect 2 mids
Diagnostic codes 0763 and 0767 (Malfunction of Bank 1 & 2 Exhaust Cam Sensors)
I'm still getting this code after repairing my fire damaged engine wire harness. I have tried to reteach the cams but i'm getting a communication error. I am thinking because the code keeps getting stored in the ECU and it will not work unless no codes are stored or of course something else. So, I'm trying to make the malfunction go away. On the OBDII side, I'm getting a P0366 and P0391 code. I need a point to point engine wiring diagram. Can someone PLEASE PLEASE PM one. I'm really struggling as a newbie an unfortunately can't pay to have someone fix it for me. I'm learning alot. I had to do quite a few splices (using the self-soldiering butt connectors) when fixing the wire harness. I've used my open/short finder to check my wires. All seems good there. Any suggestions. The exhaust sensor are new sensors. At least they were new right before the harness caught on fire. I've check the sensors for correct function on the car. No problem there. Voltage drops like it is suppose to when metal is in front of it. I had to change two ignition coils along with the connectors ( Bank2 cy7 and cy8). I also had to change the connectors for Bank2 Exhaust Solenoid. I made numerous splices of the wiring on Bank 2 only, which is where the fire started (between cy7 and cy8). Car starts up no problem. Of course it idles funky and does not have all of its power. It will go into limp mode if you try to step on it too hard. Any ideas????
Thread Starter
Junior Member
Joined: Feb 2022
Posts: 46
Likes: 12
From: Detroit and Killing Hemi's
2011 C63 AMG Eurocharged 93 tune, Agency power headers and Sect 1 mid, innotech ipe sect 2 mids
I forgot to also mention that I also replaced the crank sensor as well!!
Member
Joined: Oct 2023
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You can get wiring diagrams from Mercedes, the minimum is a one-week subscription.
AllData and Mitchell also have subscriptions that cover the W204 C63, and for one car it's fairly cheap as a DIY.
You can also browse online and "acquire" the full software pack with Xentry and install it in a VM.
One thing to note...since you've checked the wiring a lot already, it's entirely possible the ECU itself may have a problem? Do you have any local shops that can check the ECU for you? I used this company (The ECU Pro - google them) and they were fantastic in finding the fault. In my specific case, the ECU couldn't be repaired so they just cloned it to another known good ECU and sent me the good ECU. This was when my C63 had a nasty misfire that I also spent a month or two tracing wiring diagrams and swapping out coil packs before I realized the ECU itself might be bad.
AllData and Mitchell also have subscriptions that cover the W204 C63, and for one car it's fairly cheap as a DIY.
You can also browse online and "acquire" the full software pack with Xentry and install it in a VM.
One thing to note...since you've checked the wiring a lot already, it's entirely possible the ECU itself may have a problem? Do you have any local shops that can check the ECU for you? I used this company (The ECU Pro - google them) and they were fantastic in finding the fault. In my specific case, the ECU couldn't be repaired so they just cloned it to another known good ECU and sent me the good ECU. This was when my C63 had a nasty misfire that I also spent a month or two tracing wiring diagrams and swapping out coil packs before I realized the ECU itself might be bad.
Last edited by 0fc5dccf; Jul 20, 2025 at 03:05 PM.
