Vehicle kangaroo's low speed, MIL illuminated. Fault codes; P0335 Crank sensor P0300 Multiple cylinder misfire. When cleared P0300 returned imediately. Haven't had time to scope sensor, but have removed rocker cover and timing chain tensioner is at it's limit, approx 20mm. So I guess as archives suggest these throw up crank sensor faults for worn chain even though it is quiet? Just need some confirmation before I price this job as customer is bit short of brass. Any info gladly received.