Flashing yellow CEL help

[Jersey Shore]

I just got the car back from the shop for a wheel bearing replacement. I was headed to a lesson and decided to clean out the exhaust a little and brought the car up to about 4 bar boost. All of a sudden dash lights up with flashing yellow light and I get a take to workshop message. Car lost some power when the lights came on so I slowed down and pulled into the parking lot. I shut the car down waited about 2 minutes and restarted with no lights and no message. Called the shop and they said bring it by to see if they could read what happened. Before dropping off I took it on the h'way and brought it up to 1-1.1 bar with no issue in performance and no CEL. Any thoughts on what might have happened? It's at the dealer and I will hear something monda or Tuesday. JS

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[Tony@epl]

Originally Posted by Jersey Shore

I just got the car back from the shop for a wheel bearing replacement. I was headed to a lesson and decided to clean out the exhaust a little and brought the car up to about 4 bar boost. All of a sudden dash lights up with flashing yellow light and I get a take to workshop message. Car lost some power when the lights came on so I slowed down and pulled into the parking lot. I shut the car down waited about 2 minutes and restarted with no lights and no message. Called the shop and they said bring it by to see if they could read what happened.
Before dropping off I took it on the h'way and brought it up to 1-1.1 bar with no issue in performance and no CEL.
Any thoughts on what might have happened? It's at the dealer and I will hear something monda or Tuesday.
JS

I would bet money that it needs 1 coil pack. Pretty common.

Let me know how we can help!

[raineycd]

Mine was bad spark plugs... I did coil packs and plugs...

[raineycd]

Oh and the flashing CEL means there is a misfire on some or all cylinders...