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post #1 of 12 Old Yesterday, 04:39 PM Thread Starter
 
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Fault Codes / Reset

I recently did a 600+ mile ride in my Turbo S in So. California and Arizona. The machine performed flawlessly (although the gas mileage was horrific!).
Upon returning to my home in Utah (6,500 feet MSL) I acquired a check engine light. Going to the diagnostics page I found a "SPN 1127 and FMI 31 = Boost Pressure Sensor". Further research shows a "DTC P1234 = Condition Exists"
So far, I've replaced my BOV (Diverter Valve) with an Aftermarket Assassins BOV. Cleaned and blew out all connectors I could find. Cleaned sensor in the intake down stream of the air filter.
After reassembly, I drove the machine for about 10 to 15 minutes, getting it to operating temp and the check engine light still illuminates. I have tried disconnecting the batter for, oh, almost an hour. No joy.
My question: 1. Is this a hard fault that must be reset with an ECU reader?
2. Is there a chance that the fault still exists?
3. I'm open to suggestions.
Thanks!
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post #2 of 12 Old Yesterday, 04:51 PM
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Re: Fault Codes / Reset

I'm not sure the answer to this, but a "boost pressure sensor" would be between the turbo and the throttle body, most likely in the intake manifold, which is right in front of the exhaust on the back of the engine, there's no boost pressure between the air filter and the turbo.... probably called a MAP or TMAP sensor in a parts description.

Is it running bad or odd at all since the it threw the code?

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post #3 of 12 Old Yesterday, 04:57 PM
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Re: Fault Codes / Reset

I pulled up the parts diagram, there are 3 TMAP sensors, one in the air intake duct (that's probably the one you checked) one in the charge tube ( The tube with you BOV on it ), and one in the intake manifold. The charge tube or the intake would be the culprit if it were a failed sensor

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post #4 of 12 Old Yesterday, 04:58 PM Thread Starter
 
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Re: Fault Codes / Reset

It wasn't running bad on the trip. After I got it back home and it threw the fault, I took it out and the turbo didn't seem to be operating properly. It was sluggish, but never went into limp mode. I did clean the boost pressure sensor as well. (Forgot to mention.)
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post #5 of 12 Old Yesterday, 04:59 PM Thread Starter
 
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Re: Fault Codes / Reset

I didn't mess with the sensor in the charge tube. Is cleaning it worth the effort? Or should I just replace it?
Also, thanks for mentioning the parts diagram. I always forget to check that! It's a good way to see 'the lay of the land'.
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post #6 of 12 Old Yesterday, 07:51 PM
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Re: Fault Codes / Reset

Honestly, Iím not sure if itís worth cleaning or not, Iíve never had an issues so Iíve never messed with them, but it is pretty cheap to try and clean it

Possibility it could be a wastegate issue, or a turbo issue too, you can pull the intake off the turbo and see inside fairly easily, and check the wastegate adjustment rod for anything abnormal

You donít have a PVCX by chance do you?


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post #7 of 12 Old Yesterday, 07:58 PM
 
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Check to make sure the boost controller vent tube is not clogged.
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post #8 of 12 Old Yesterday, 08:14 PM
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Re: Fault Codes / Reset

Quote:
Originally Posted by RZR_Joe View Post
Check to make sure the boost controller vent tube is not clogged.


Good Call, forgot about that


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post #9 of 12 Old Today, 07:01 AM
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Re: Fault Codes / Reset

Quote:
Originally Posted by RZR_Joe View Post
Check to make sure the boost controller vent tube is not clogged.
I agree with Joe. Here is a pic of the vent he is speaking of.


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post #10 of 12 Old Today, 07:06 AM
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Re: Fault Codes / Reset

If it is clogged and causing the issue, I suggest tapping it into the side of your airbox to avoid future clogs. There is additional pics of how I did mine in my build thread below.
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post #11 of 12 Old Today, 08:25 AM
 
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Quote:
Originally Posted by True K30 View Post
If it is clogged and causing the issue, I suggest tapping it into the side of your airbox to avoid future clogs. There is additional pics of how I did mine in my build thread below.
Can we get a link to this mod? Can't seem to find it.
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post #12 of 12 Old Today, 12:10 PM
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Re: Fault Codes / Reset

Quote:
Originally Posted by Vallone1990 View Post
Quote:
Originally Posted by True K30 View Post
If it is clogged and causing the issue, I suggest tapping it into the side of your airbox to avoid future clogs. There is additional pics of how I did mine in my build thread below.
Can we get a link to this mod? Can't seem to find it.

https://www.rzrforums.net/rzr-xp-tur...-texas-10.html

Page 10 of my build thread. Scroll down to the post on March 10th, 2019, 08:24 PM



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boost dtc p1234 , fmi 31 , p1234 , pressure sensor , spn 1124

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