Content Source: 2021 RZR Pro XP and Pro XP 4 Owner’s Manual (9931538 R01) > 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.

Click the CONTENTS link above for the Table Of Contents, or download a full PDF of the Owner Manual in the Owner Support area of Polaris.com

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


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