[andrewmponeill]

Idle stop isn't supposed to activate when the steering wheel is turned over a certain amount. I'm not sure the percent/angle though.

I discovered a very loose battery cable and figure that this must be the culprit. I couldn't get any power at all to the car today so I lifted the hood and sure enough the negative cable wasn't making proper contact anymore, it was that loose.

Although I don't see anything on the paperwork I presume my last service included an update of some sort and they reset things that way? All I know is that the bolt took a lot of turns to tighten up so surely it didn't get that loose on its own. Anyways, the car runs fine now and the engine malfunction warning is gone. I'm thinking that intermittent battery power affected the electric assist steering and that's why I had that problem the day before. Still going to have the dealer look at it though, and explain why the cable was left that way.

 

[ZeekZirconPPT]

It is possible the cable due to vibration came loose. Perhaps they didn't tighten it down enough as the contributing issue. Voltage spikes will certainly cause a myriad of interesting lights to come on.

 

[thusharamcalman]

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What was the cause of this problem.... experiencing the same error now