Phony Engine Light

[JE 17]

2011 Turbo which just turned 100k miles.

Twice in the last two weeks, I had the check engine light illuminate. At the same time, the PSM light accompanied it.

I tested with both my Carly and Durametric and found no codes. Two or three starts later, the PSM light went out, followed by the engine light.

The only symptom was at one time, the engine seemed a little rough, but as I said, I didn't see any codes. Both times, temperatures were in the teens to low twenties, and the engine was warm when the lights appeared after a restart.

Connector issue somewhere?

[JFP in PA]

More likely a battery issue, get the battery load tested.

[JE 17]

Finally got it on the Durametric: misfires in Cylinders 3 &7. 

I'm not a big fan of throwing parts but with that diagnosis I've ordered all new coils and plugs.

I still don't see why the PSM failure and stop/start were activated.

Once I can drive again, I will get the battery tested, though it's only 10 months old, I know they can still fail.

[JE 17]

All new plugs and coils cured all.

That wasn't the easiest plug change I've done. My Boxster is far easier!