They put tps on said it was fixed got 10miles from shop went n limp mode throttle wouldn't work now there saying maybe wiring harness afraid if they happen to fix going to cost fortune
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Well, at least they're not replacing the ECM...yet. But, if the code they're chasing down is related to the Throttle Acceleration Sensor (TAS), they replaced the Throttle Position Sensor (TPS). The TAS is inside the throttle grip on the handle bars. It's actually two magnets and a double output hall effect sensor for redundancy. All that means is that it is the sensor that tells your ECM how much throttle you're asking for. If one or both of these fails, however, you typically get additional TAS related codes. The TPS, on the other hand, tells the ECM the actual position of the throttle plates. So, the TAS is what you're asking for, and the TPS is what you actually get. And, of course, the ECM is involved in controlling and monitoring the entire process.
Now, if there is a wiring harness issue between the throttle grip and the ECM, that might not be that expensive. I don't know. But, if they haven't investigated the sensor at the throttle grip yet, I think they should. It could be a simple problem.
If it was me, and I had the machine back in my possession, I would try a different dealer. After two months with no results, I would trailer it someplace else. If that's not a possibility for you, you would also want to contact BRP Customer Care and get a case opened on your problem. Give them all the pertinent info. Word is that they're pretty good at responding to the email.
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It must be beautiful riding this time of year in Oklahoma and I know this is frustrating being without your ride for all this time. Take an active role in getting this resolved whether it be with this dealer, another one, and BRP. Other's on here may have some additional feedback for you so check back.