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Rough Idling Problems For The 2012 Toyota FR-S.

Updated October 10, 2012

2012 FRS Toyota The tuner world has been dealt a small blow with it’s newly received tinker toy. Apparently there has been some issues with our beloved dynamic duo, the 2012 Toyota FR-S, and 2012 Subaru BRZ. The buzz in the world of auto blogs, and raging automotive forums is that, quite a few 2012 Subaru BRZ‘s, and more than a few 2012 Toyota FR-S’ have been giving their owners more than a handful of grief.

It has been reported that these twin marvels have been either suffering from rough idling problems, and in some cases, complete stalling of the engine all together. Well the forums, and the owners of these great cars needed to have their quarries answered, so Toyota, and Subaru CEOs came up with an answer. Let me try to explain this as best as possible. It was explained that the ECU of both the 2012 Toyota FR-S, and 2012 Subaru BRZ has a “programming glitch”. It seems that the ECU of both cars were set up to learn the driver’s habits, and then store them accordingly up to the first 100 miles of driving. Within these parameters, the cars perform just fine, but as they have traveled outside of those parameters (100 miles)this is where the issue seems to be kicking in for most people. This was a great idea at first, but the problem has been kicking in for numerous drivers well after the 100 mile mark. The problem continues when the ECU then tries to “fix” the problem on it’s own, in doing so fails, produces a “P0019” error code (check engine light), and the end result is rough idling, and stalling.




2012 Subaru Eninge BRZ The fix for this problem has come in two forms, one from Toyota, and one from Subaru. Subaru has offered drivers with this problem, a simple solution of re-flashing the ECU. They say that doing this will unlock the ECU, and allow it to work outside of it’s normal parameters. Toyota, being the perfectionists that they are, want to replace the entire ECU all together. The reps from Subaru completely disagree with this tactic, but can really do nothing about it.

With all of that said, there still have been some complaints about the idling, and stalling issue from drivers of both cars. It has been reported that some 2012 Toyota FR-S‘, and 2012 Subaru BRZ’s are still having problems well after the ECU was re-flashed. One owner stated on the site, Mine’s on the 3rd week at the shop. Parts are on back order. VVTi Cam Gear, & oilSubaru 2013 BRZ control valve are what they claimed to be replacing. Waiting on gaskets, which are on back order, apparently” there have been no further comments from either, Toyota, or Subaru, about cars that still have the idling issue. 


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Calvin Escobar
About Calvin Escobar

The Car scene is so diverse Where I come from, most enthusiasts recognize the amazing engineering (particularly the engines). The bulk of the ridicule originates from the manner in which many of the vehicles are modded/maintained. Thus, the jokes and or hate tends to be aimed more at the owner rather than the machine. All of which makes seeing properly sorted old Toyota's and Hondas at car meets, auto shows, and track days all the more refreshing.

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