Code PL1234??

1407 Views 7 Replies 4 Participants Last post by Blthndr, 2 mo ago

markgam

Discussion Starter · 2 mo ago

A friend of mine was riding his 2021 Turbo S and right after accelerated from a dead stop he immediately sawing the infamous wrench Icon. The machine threw a PL1234 code. He wasn't able to clear it himself so he decided to take it to the dealership where he purchased it. They are apparently stumped as they don't know what is causing the error. Each time they clear the code it comes right back. The dealership is stumped (Surprise surprise) and supposedly they have two other 2021 Turbo S with the same issue. Note all three of these machines had the clutch upgrade at the same dealership. My friend thinks that when they flashed the ECM they might have used the wrong or corrupted tune.

From what he was able to determine the code refers to an issue with the turbo. He found this post but according to the dealer the boost pressure sensors and the boost control valve and the dealer reports that these items were fine. But who knows how they check these items.

Any thoughts??

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Duneflyer

· #2 · 2 mo ago

Does he also has an 1127 code? IIRC this is an over boost condition. I had the same two codes not too long ago.

I’d check the waste gate actuator pod - could be it’s not opening the waist gate because the diaphragm is bad. That is the problem I had that produced these two codes.

Easy enough with a small hand pump. The service manual goes into good detail on how to do it. If it’s bad check the BOV too.

And BTW don’t use any but an OEM boost control valve. It has to have the correct resistance and the one AA sells won’t work. I found this out the hard way.

Good luck and keep us posted.

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markgam

Discussion Starter · #3 · 2 mo ago

Duneflyer said:
Does he also has an 1127 code? IIRC this is an over boost condition. I had the same two codes not too long ago.

I’d check the waste gate actuator pod - could be it’s not opening the waist gate because the diaphragm is bad. That is the problem I had that produced these two codes.

Easy enough with a small hand pump. The service manual goes into good detail on how to do it. If it’s bad check the BOV too.

And BTW don’t use any but an OEM boost control valve. It has to have the correct resistance and the one AA sells won’t work. I found this out the hard way.

Good luck and keep us posted.

No just the PL1234 code.

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Duneflyer

· #4 · 2 mo ago

Product Font Screenshot Electronic device Technology

Going to assume Polaris uses same code here

Wastegate Flapper Inspection; P1234 Boost Reference Code Troubleshooting - Polaris RZR PRO XP 2020 Service Manual [Page 172]

Polaris RZR PRO XP 2020 Manual Online: wastegate flapper inspection, P1234 Boost Reference Code Troubleshooting. Due To The High Pressures And Temperatures Seen In The Turbine, The Wastegate Flapper And Associated Components Are Susceptible To Wear After Extended Use. Q Outer Crank Arm...

www.manualslib.com

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a.doug

· #5 · 2 mo ago

markgam said:
A friend of mine was riding his 2021 Turbo S and right after accelerated from a dead stop he immediately sawing the infamous wrench Icon. The machine threw a PL1234 code. He wasn't able to clear it himself so he decided to take it to the dealership where he purchased it. They are apparently stumped as they don't know what is causing the error. Each time they clear the code it comes right back. The dealership is stumped (Surprise surprise) and supposedly they have two other 2021 Turbo S with the same issue. Note all three of these machines had the clutch upgrade at the same dealership. My friend thinks that when they flashed the ECM they might have used the wrong or corrupted tune.

From what he was able to determine the code refers to an issue with the turbo. He found this post but according to the dealer the boost pressure sensors and the boost control valve and the dealer reports that these items were fine. But who knows how they check these items.

Any thoughts??

I have the same machine, and just had the same code pop up. What I found was the small rubber tube from turbo to the boost controller had come off at the turbo.
I just cut the end off , put it back on and took it for a ride. All good.

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Blthndr

· #6 · 2 mo ago

The hose from the turbo to the boost control valve failing is a common problem. All four of the Turbo machines that I ride with, that have some miles on them, have all failed this hose. The hoses seam to be deteriorating with heat and age. Improper material for the hose. Best that you have some extra hose and either small hose clamps or wire to fix on a ride. The factory clamps can be pain to remove.

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Duneflyer

· #7 · 2 mo ago

Blthndr said:
The hose from the turbo to the boost control valve failing is a common problem. All four of the Turbo machines that I ride with, that have some miles on them, have all failed this hose. The hoses seam to be deteriorating with heat and age. Improper material for the hose. Best that you have some extra hose and either small hose clamps or wire to fix on a ride. The factory clamps can be pain to remove.

I wonder if insulating it with a larger hose over it might extend its life.

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Blthndr

· #8 · 2 mo ago

The area around the hose is warm, so perhaps some benefit. The hose has constant charge air pressure and temperature. An extra hose around this might result in less heat dissipation though. The failed hoses that I have seen are at the turbo compressor hose barb. Some level of flexing also is present as the motor vibrates and the boost control sensor side is chassis mounted.

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