Engine Stops or Loses Power

Content Source: 2021 RZR XP Turbo S Velocity / XP Turbo S4 Velocity Owner’s Manual (9931525 R02) > Troubleshooting Chapter

IMPORTANT

The Owner's Manual for this vehicle contains warnings, instructions and other information you must read and fully understand before safely riding or performing maintenance on this vehicle.Always follow the warnings and instructions in Owner's Manual.

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Engine Stops or Loses Power

Possible Cause	Solution
Out of fuel	Refuel
Kinked or plugged fuel tank vent line or filter	Inspect and replace
Water is present in fuel	Replace with new fuel
Fouled or defective spark plugs	Inspect, clean and/or replace spark plug
Worn or defective spark plug wires	Your POLARIS dealer can assist.
Incorrect spark plug gap or heat range	Set gap to specs or replace plug
Loose ignition connections	Check all connections and tighten
Low battery voltage	Recharge the battery to 12.8 VDC
Incorrect fuel	Replace with fresh recommended fuel
Clogged air filter	Inspect and replace
Clogged intake pre-filter	Inspect and clean (with soapy water) or replace
Other mechanical failure	Your POLARIS dealer can assist.
Overheated engine	Clean radiator screen and core, clean engine exterior, check coolant level. Your POLARIS dealer can assist.
Loose, missing, torn or kinked boost reference line from manifold to fuel pressure regulator or blow-off valve	Replace boost reference line
Loose, missing, torn or kinked boost reference line from turbo compressor to boost control valve	Replace boost reference line
Loose intake system connections	Inspect connections, tighten or replace as needed
Worn or defective wastegate actuation system	Your POLARIS dealer can assist.
Overheated intake air system	Inspect intercooler water lines for leaks or kinks, repair or replace as needed