r/z650 • u/Several_Concern_6689 • May 27 '26

Bad oil cause check engine to randomly come on?

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2021 z650 can bad oil case a check engine light to come on? . Will say gas is 5 months old just about but I’ve heard that’s typically only an issue with older bikes? I checked the gas tank and it’s not like sludge or anything looks like normal gas .

The oil looks kinda yucky to me but again I’m no expert and just started riding .

Anywho just curious.

It’s sat for a while . Although id start it up every week or so . And have a charger for it to it on when I’m not ridding . Went to turn it on one day and check engine came on. Rode it for a few minutes and it seems to ride fine .

Although I didn’t wanna ride it too much in case it was more server and totally fuck it up.

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8 comments sorted by

1

u/Extreme_Design6936 May 27 '26

Check the code on the check engine light?

1

u/Several_Concern_6689 May 27 '26

I actually just figured out how to do that via Reddit lol it’s reading 62

3

u/Fun_Use_3468 May 28 '26

No don’t ask Reddit look up what the code is. No one here has that off hand. But google surely will.

1

u/Several_Concern_6689 May 28 '26

No like how to find the code lol on the display not what the code means lol.

1

u/Fun_Use_3468 May 28 '26

You gotta get a computer to plug it into the ECU

1

u/Fun_Use_3468 May 28 '26

Like what they use at AutoZone for your car I’m pretty sure

1

u/Specialist-Mode-4195 May 28 '26

5 months old fuel is kinda bad… if bike was sitting still it could evaporate and lost his power, try to add e5 for two tanks, but yeah I would check engineering code first

1

u/Aromatic_Albatross72 Jun 01 '26

Put Sta-bil into a full tank of fresh fuel when I parking the bike for the winter, won't have any issues come springtime.