SL/R231 Check engine light - P014a

Mar 3, 2026 | 04:01 PM

Pushinit

Thread Starter

Junior Member

Joined: May 2025

Posts: 17

Likes: 3

2014 SL550

Check engine light - P014a

I pulled a code on my 2014 SL550 for the rear drivers O2 sensor. I assume this is just a bad sensor, though with only 55k miles I’m a bit surprised it died already. I don’t have the car with me so can’t get under it to check out the challenge to replace it. Can anyone tell me how accessible that sensor is? Can I easily get a wrench on it to get it off for a quick switch?

thanks!

Mar 5, 2026 | 12:36 PM

Pushinit

Thread Starter

Junior Member

Joined: May 2025

Posts: 17

Likes: 3

2014 SL550

Thanks for the comment. Seems odd that I can’t find anything either. Hopefully I won’t have to worry about it. I cleared the code and tightened the gas cap, which was a little loose. Maybe it was an odd code thrown due to that. So far it’s been started a couple of times and driven for maybe 10 miles. If it is a real issue I should know pretty soon.

Mar 5, 2026 | 06:17 PM

Pushinit

Thread Starter

Junior Member

Joined: May 2025

Posts: 17

Likes: 3

2014 SL550

No, I didn’t jack it up to look. Once I saw the cap was a little loose I tightened it and cleared the codes. Still no return of the code. We’ll see what happens.

Reply Subscribe

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)

SL/R231: Check engine light - P014a

SL/R231: Check engine light - P014a