Agiyo

That's certainly a possibility, Costco is often extremely busy. I should have checked for a loose gas cap; thank you for the reminder.

carrnut21

I track my car on Arco. Only station near PIR. Four 20 minute sessions of red line shifts. Runs like a champ

Agiyo

Update, for what it's worth.

I changed the plugs on my car, have run a couple of tanks of Costco premium gas, no problems, no CEL, all is good. It may have been the case that the older plugs, which were colder than stock, put the emissions sensor just on the brink of showing the CEL, and whatever difference there is between Chevron and Costco Premium, was enough to trigger the light. Or, it could have been the phases of the moon and the migration of anchovies. And Leprechauns.

In any case, the S2000 happily digests Costco premium now.

Live and learn, or not.

JC

Agiyo

We don't call my misorganization The Institute of Empirical Blunders for nothing.

The CEL relit, I reset it, it lit again. This on both Costco Premium and Chevron Premium gas. But both times, it happened during wet road driving. Hmmmmmm.

Maybe the newish O2 sensor was bad?

I went under the car, and one of the sensor wires' insulation had been nicked. There were bare wires exposed to the elements. Who knows how it happened, a rock thrown up by a front wheel, too many layers of paint on a speed bump, but there it was.

I rebundled the wires as best I could, covered them with insulating Goop, and wrapped it in insulating tape which I also sealed with Goop. No CEL since then. Long drive coming up, I expect no problems but will report what happens.

Cheers folks,
Joe

Sabre

Glad to hear you seemingly solved your problem, Joe. Hopefully that will be the end of the hassle.

EricJT7

Gas- What not to Do- Filling up with a lower grade than recommended by manufacturer (ex. filling up your S2000, Golf GTI, BMW M3, Mercedes AMG ... with 87 instead of 92 octane).
I'd say 99% of the time people are putting premium in those cars, but then there's a lot of cars that still recommend premium (like a base 3 series BMW or non AMG Mercedes), and say up to 25% of the time, people are filling them with regular, and then wonder why they run into expensive problems down the road. It is gambling trying to save an extra $2-3 a fill up, and then by getting lower gas mileage potentially they are going to offset that, and worse costlier repair bills will result so in the long run costing even more than just filling up with the correct grade of gas in the first place.

My comment is more based on the title, not your experience as it wasn't the gas that was the problem, it was..a sensor?

jcconnox

You must be a redditor

Colder than stock plugs. Probably fouled the sensor, throwing the code.

Anyway, here's some extended reading on Top Tier (R) gas for everyone

ARCO and Costco are on the list of approved fuels, as well ash Chevron, BP, Shell, Valero and 76.

If Honda says it's good, then that's good enough for me.

Chuck S

Loose gas cap on my '06 displays CHECK FUEL CAP (in text) on the dashboard. Hard do miss! Not sure when this became standard. CEL not illuminated the one (1) time this happened to me.

-- Chuck

EricJT7

1:24- "Don't Check a Tanker's Fuel Level with your Lighter"
https://www.youtube....h?v=-5M--0CSZ1I

https://www.youtube.com/watch?v=5u_HeUvZD6o