It's an 02 VTR. Put a VTS gearbox in it the other day and done about 20-30 miles to give it a good breaking in before I floored it to see what it was like 0-60. I was surprised of how much of a difference the VTS gearbox made so I done the 0-60 one more time before I went in for the night and just when i slowed back down to 30ish that's when the handbrake light and oil pressure light came on and the engine started making this noise:

Video from inside the car so you can see the revs its sitting at when it makes the rattling noise:

I know it's not the gearbox as the noise is coming from the drivers side of the engine. There are no oil leaks (oil is just under the max marker on the dipstick), the car is not under or over fuelling, the engine temp gauge still sits under the half way point... it runs perfectly bar the 2 dash lights and the noise.
My mate plugged it into his diagnostics thing and it came up with this:
Cylinder 1 reference sensor
P1327
I've read on here that that code means there could be a problem with the coil pack? But surely that wouldn't cause the engine to make that rattling noise?
My mate thinks it could be some U shaped bearing in the engine that when it wears it sort of slips and turns which would also cause a drop in oil pressure making that light come on?
Just wanted to get some second opinions before we try and tackle the problem.
Cheers for any help guys.
The Problem:
Apparently my car didnt have the original dipstick in it due there being an inch and a half off the end of the original one floating around in the sump which eventually got caught in the oil pump chain and snapped it. Trust it to finally catch it in my ownership. Hope this helps anyone who might encounter the same problem due to incompetent previous owners. I mean if the end of your dipstick is missing SHOULDNT YOU GET IT OUT THE FUCKING ENGINE?!

Video from inside the car so you can see the revs its sitting at when it makes the rattling noise:

I know it's not the gearbox as the noise is coming from the drivers side of the engine. There are no oil leaks (oil is just under the max marker on the dipstick), the car is not under or over fuelling, the engine temp gauge still sits under the half way point... it runs perfectly bar the 2 dash lights and the noise.
My mate plugged it into his diagnostics thing and it came up with this:
Cylinder 1 reference sensor
P1327
I've read on here that that code means there could be a problem with the coil pack? But surely that wouldn't cause the engine to make that rattling noise?
My mate thinks it could be some U shaped bearing in the engine that when it wears it sort of slips and turns which would also cause a drop in oil pressure making that light come on?
Just wanted to get some second opinions before we try and tackle the problem.
Cheers for any help guys.
The Problem:
Apparently my car didnt have the original dipstick in it due there being an inch and a half off the end of the original one floating around in the sump which eventually got caught in the oil pump chain and snapped it. Trust it to finally catch it in my ownership. Hope this helps anyone who might encounter the same problem due to incompetent previous owners. I mean if the end of your dipstick is missing SHOULDNT YOU GET IT OUT THE FUCKING ENGINE?!
