hello everyone need help as my xc90 will crank but not start 99% of the time


here are the following codes

(P0336) - Crankshaft Position Sensor A Circuit Range/ Performance

(P0040) - O2 Sensor Signals Swapped Bank 1 Sensor 1/Bank 2 Sensor 1


i have replaced the following

1.timing was off i have corrected this using the correct locking tools and VADIS

2.fuel pump was leaking - replaced along with filter

3.coil packs have been replaced along with spark plugs

4.replaced the crank position sensor and cradle

5.replaced the starter motor just for the hell of it

i have had the car running 3 times but this only occurs rarely and once i turn it off it wont start again


i have herd it could be 1 of 3 things

fly wheel, starter motor emp messing the crank position sensor signal or
gearbox has not got the correct earthing to chassis or bell housing to engine

i checked the 3 grounding points on both sides of the fenders and sanded the contacts



please help me as im starting to get that hopeless feeling


thanks for your time


Chris