From day 1 when I read out the error codes it blinked 41.
Short to ground or something. Anyway it meant something was wrong in the TBAP area.
TBAP "Temperature Barometric Air Pressure" sensor on the intake sleeve between air filter housing and throttle body.

Symptoms are rough low idle, sometimes dying and hard to start up.
But the didn't persist and most of the time it ran perfect.

After some driving around I noticed the wires leading to the TBAP rubbing through. So these were insulated using some tubing and rerouted.
It ran fine for a while and then CODE 41 persisted again.

I noticed the wires seemed to have some damage at the connector and try to push them a little further into the connector.
Problem solved.

It ran fine for a while and the CODE 41 was there again.

So my final hard-core solution was do away with the connector entirely and connect the wires to the TBAP with small single automotive connectors.
You have to grind some of the TBAP connector down to expose the connectors.
Then parabond up the entire connection.

Problem hopefully finally solved. It runs fine now

When I examined the connector I easily pulled out 2 of the 4 wires. The others I pulled the guts out of the connector.
If I had replaced the whole wiring harness I could have had the same problem somewhere else.

@POLARIS
You guys really need to check the wiring connections on the harnesses.

yes check your wiring harnesses i am working on 2 machines know that both have wiring problems from bare wires from factory that are rubbing through on the wire loom were they enter the loom & were they splice into the loom

i have change it 4 times
now i have to do it again

If you buy the kit with end from polaris you should never have to touch it again.

Is there a part number for that end kit??

it is the wiring pigtail for the t-bap sensor you dealer should know what you are talking about it is a common problem.

Try Being a Polaris Dealer in Europe Belgium "Brussels Sprouts & Callebout chocolate" with just the repair manual for back-up.
I ordered in a fly-wheel puller 2 months ago, haven't seen that one yet.
So I made one myself.

I asked the importer if he could show me the air-filter on an 850 XP.
He hadn't even taken of the seat and was selling these machines.

We don't get any info or technical training at all!
Just recals are transmitted.

I've found ATV frontier to be a very valuable source of info. Especially on the older Popos.
Though little bastards.
Just like those European Popo dealers.

i will see if i can find my receipt on monday with the part no.

That would be greatly appreciated

I have it in my tool box will get it to you tomorrow if i can remember

HERE HOPE THIS HELPS

CONNECTOR SERVICE KITS FOR 700/800 ATV EFI
- 700 RANGERS

2875542 KIT-HARNESS, T-BAP
2875543 KIT-HARNESS, ENGINE TEMP
2203801 KIT-HARNESS, TPS, ATV/RGR, TWINS

CONNECTOR SERVICE KITS FOR 500 ATV EFI -
500 RANGERS

2876315 KIT-HARNESS, ENGINE MAP SENSOR
2875900 KIT-HARNESS, ENGINE AIR TEMP
2875901 KIT-HARNESS, ENGINE INJECTOR
2203800 KIT-HARNESS, TPS, ATV/RANGER SNG

CONNECTOR SERVICE KITS FOR FS/FST SNOW

2203160 KIT-HARNESS, BOOST PRESSURE
2203161 KIT-HARNESS, CRANK SENSOR
2203162 KIT-HARNESS, T-MAP
2203163 KIT-HARNESS, KNOCK SENSOR
2203748 KIT-HARNESS, COOLANT TEMP 2203164 KIT-HARNESS, IGNITION COIL
2203165 KIT-HARNESS, TPS
2203166 KIT-HARNESS, INJECTOR
2203167 KIT-HARNESS, PHASE SENSOR

That should sort things out.

guess you got your info we should put this one in the faq section