BMW R1200RT/R1250RT Forum

While riding last week, my 2017 R1200RT lost power and I had to limp back home. I ran a scan today with my GS911. It said that I had a 0X3A1B61 fault, which is a "camshaft sensor input signal, no signal edge detected, input level low." What ever that means?

Anyone dealt with this problem before? Nothing on the sensor or wiring seems to be damaged. I have no idea how to troubleshoot the problem. A new sensor runs $177.



Anybody have any suggestions?



TIA

This is what the browser AI suggested

R1200RT Fault Code 0X3A1B61
Based on the provided search results, I’ve compiled a comprehensive answer to help you understand the fault code 0X3A1B61 on your BMW R1200RT.

Fault Code Analysis
The search results do not specifically mention the fault code 0X3A1B61 for the R1200RT. However, I’ve found related information that might be applicable:

EWS (Electronic Immobilizer) System: The search results discuss the EWS system, which is a CAN-bus based system on BMW motorcycles, including the R1200RT. Fault codes related to EWS can be complex and multifaceted. It’s possible that 0X3A1B61 is an EWS-related code.
Ring Antenna and Evaluation Electronics: The search results highlight issues with the Ring Antenna and Evaluation Electronics, which are critical components of the EWS system. Faults in these areas can cause intermittent or permanent display of the “EWS” symbol on the instrument cluster.
Throttle Grip Sensor: Another search result mentions a throttle grip sensor fault code (930F 6266) on a 2004 R1200GS. Although the exact code 0X3A1B61 is not mentioned, it’s possible that similar issues with throttle grip sensors or related components could be causing the fault.
Troubleshooting Steps
Given the complexity of the EWS system and the lack of specific information on 0X3A1B61, I recommend the following general troubleshooting steps:

Consult the BMW dealership or authorized service center: Reach out to a BMW dealership or authorized service center for guidance on diagnosing and repairing the fault code 0X3A1B61 on your R1200RT.
Check the Ring Antenna and Evaluation Electronics: Inspect the Ring Antenna and Evaluation Electronics for any signs of damage, corrosion, or wear. Clean or replace these components if necessary.
Verify throttle grip sensor functionality: Check the throttle grip sensor for any issues, such as faulty wiring or connectors. Consult the throttle grip sensor troubleshooting guide (if available) or seek assistance from a BMW dealership or authorized service center.
Monitor the bike’s behavior: Observe the bike’s behavior, including any symptoms or warning lights, to help identify potential causes of the fault code.
Conclusion
While the search results do not provide a direct match for the fault code 0X3A1B61 on the R1200RT, they offer insights into related issues with the EWS system, Ring Antenna, and throttle grip sensor. By consulting a BMW dealership or authorized service center and following general troubleshooting steps, you may be able to diagnose and repair the fault code 0X3A1B61.

Very kind of you to take the time to research the OP's issue and posting the reply. It did make me laugh though. The AI took multiple paragraphs to tell you it doesn't know the answer and if you get that code you should contact your dealer.

On that showing, I don't think AI is ready to take over the world, yet.

Well, things got worse.
The problem just started at the camshaft sensor. Someone mentioned that I check the cam advance first.
I checked the cam setting, and it was a few degrees off. I also checked my cams. Oh, crap, do I have a problem.
One cam lobe on either side is worn down about 1/8". I am wondering what would have caused that? I use premium synthetic oil and change it regularly.

No matter what, this going to get expensive. New cams retail here for $688 each

Randyjaco wrote: ↑Mon Nov 25, 2024 10:39 pmI am wondering what would have caused that.

Camshafts made of chocolate, https://static.nhtsa.gov/odi/tsbs/2021/ ... 4-9999.pdf