PSM failure and reduced engine power on the way to work today

I was driving to work today and while coming off from a stop light, my 2009 Cayman S suddenly stopped accelerating and I noticed a message on the dash. I was able to get off to the side of the road, and saw on the cluster there was a PSM fault as well as reduced engine power. I was barely able to move with the reduced engine power, so there was no way I was going to be able to merge back in to traffic. I shut the car off and restarted it. The PSM error went away, however I now had a check engine light and a message stating the car needs to be serviced. I was able to make it in to work, and then back home later in the day. The car seemed to drive completely normal and didn't have any issues other than the check engine light. I hooked up my Durametric as soon as I got home and saw there was a fault on the engine control module: 5215 - Control unit function monitoring Implausible signal As well as a fault on the PSM module: C200 - Control module fault engine electronics (drive) I was able to clear the fault on the PSM module, however the fault never goes away on the engine control module no matter how many times I try to clear it. The check engine light went off, however the fault is still reported which makes me think there is still something going on. I took it for a short 2-3 mile drive and it's still driving normal with no check engine light, but I'm concerned about that persistent 5215 fault. I tried searching Google for both of these codes, but nothing has really turned up. Any ideas on what could be going on here?

Sounds like one of your sensors has malfunctioned and is send bogus data. I'm guessing you will need a PIWIS at a dealer or indy shop to pinpoint the faulty sensor.

Thanks for responding. I was hoping to avoid taking it to the dealer but at this point it seems like my only option. I currently have a Softronic tune on the car. I'm guessing there is no point in flashing it back to stock since the car is no longer under warranty anyway.

Any news on this issue? I got the "reduced engine power" light this morning on my 2010 Cayman shortly after starting out. The car had not been driven for 5 days so I'm charging the battery to see if that helps.

Haven't had the check engine light come back or observed any issues since codes were cleared. I haven't had time to hook the car back up to see if the engine control module fault is still there. Did you get any PSM errors along with the reduced engine power alert?

No PSM error, just the "reduced engine power" light. It is in my local (independent) shop now. I'll let you know what happens.

glad the cause was discovered quickly and hope the little critters (I'm assuming mouse/rat) stay outta there