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Read articles →This is a full hands-on repair walkthrough for an LS XR4145 throwing a P0371 crank sensor code, not a generic overview. It covers diagnosing with a scope, pulling the starter for access, swapping the sensor and O-ring, noting a thicker redesigned sensor tab, and clearing codes with an aftermarket OBD2 scanner, then confirming the fix by running the engine. Best for owners chasing an intermittent miss or limp-mode fault on this model.
Appears to be an owner or independent mechanic doing their own diagnostic and repair work, not a dealership or sponsored channel.
The tractor threw a P0371 code, described as an extra signal or advanced timing issue, after scanning with an OBD2 scanner.
Pull the starter out of the way first by removing two 14 mm nuts, which exposes the crank sensor held by a 10 mm bolt.
The old sensor tab was much thinner than the redesigned one, likely causing interference or spacing issues with the pickup wheel, worsened by rust.
Remove the lower cover with Phillips screws to find the OBD2 port, connect a scanner like the Launch tool, read codes, then clear fault codes.
