Possible Crankshaft Position Sensor Fault - Advice Needed

Hey, I was hoping for some advice!

I have a Gen 3 facelift Jimny (M13A Engine).

Last night, I went to start him up (cold start), but it took a few attempts, and it didn't seem to be cranking. It was silent the first couple of times, with some quiet clicks on the third, and finally got going on the fourth. The engine warning light also came on. My initial thought was that my start motor could be failing or that the battery could be low.

When I got up in the morning, I checked my battery, and it was fine. Engine warning light had cleared and my OBD2 Scanner did give me this warning: P0335: Crankshaft Position Sensor A Circuit

I did have a similar issue with starting back in March, but when checking my starter motor, the power connection was a little loose (so I put it down to this) - not sure if this could be related.

I also had an issue in February when I was stuck in traffic. When I set off, my revs were super low, and I struggled to get any speed other than crawling along. Turning the car off for a few minutes and back on seemed to clear that issue. Again, I'm not sure if this could be related.

I had no issues over the summer and I've done a good 4k miles this summer.

After looking around on the forums, I'm hoping a quick swap of the sensor for a new one will sort it out. However, I would love to know if anyone has any other ideas or possible fixes I could try.

Any help would be much appreciated!

I would leave the crank position sensor alone until/unless the code shows up again - and if that is also accompanied by a no crank situation, fix the no crank situation as the first step.

The no crank situation can cause the crank position sensor error, but a defective crank position sensor will not prevent the engine from cranking.

The detect condition for that code is "no signal for 2 seconds during engine cranking" - if the ECU sees the "start signal" which comes from the starter wiring, it assumes the engine is being cranked, even if the starter isn't working and will set the code erroneously.

Thanks for the help! I'll reset that code to see if it appears again.

Part of my issue is it's happening intermittently.

I'll double-check my battery, inspect the wiring, and clean the connections for the starter motor.