CEL today

[Lightsped]

Started the Jeep for my commute to work, and instantly got a CEL. Checked gas cap and it was fine. Jeep performed perfectly on the way to work with no issues. Tried restarting upon arriving to work. Still had CEL.

3.6 V-6, manual, with less than 7k miles.

Any ideas?

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[RenegadeT]

Are there any messages on the screen behind the steering wheel? I think its menu #8.

 

[Lightsped]

Checked on the screen behind the steering wheel and was unable to locate any messages....

 

[falcon241073]

If you don’t have a code reader or tazer to get the codes then stop by an Autozone and have them plug in and check. Most have a reader. Get a copy of the codes and you can look up the codes on a search engine. Or report back here.

Some shops, like Firestone or similar, will read your codes for you for free. If you have a good relationship with your dealers service writer you could possible get him to pull the codes for free.

 

[Roky]

Started the Jeep for my commute to work, and instantly got a CEL. Checked gas cap and it was fine. Jeep performed perfectly on the way to work with no issues. Tried restarting upon arriving to work. Still had CEL.

3.6 V-6, manual, with less than 7k miles.

Any ideas?

It’s likely an O2 sensor, easy fix….. a piece of black electrical tape placed over the light….

 

[AC87]

It’s likely an O2 sensor, easy fix….. a piece of black electrical tape placed over the light….

I use that trick with my Mercedes Sprinter work van, used to light up my dashboard like a Christmas tree lol

 

[aldo98229]

Over the next couple weeks, look out for other minor, unrelated electronic gremlins, like the backup lines disappearing and later reappearing, the backup camera going dark and then working again, the tire monitor warning light coming on and then going away, the “ESS Unavailable” message coming on and then disappearing, the transfer case shifting out of 4WD on its own, the speakers popping when you start the vehicle, etc.

If so, you have a weak auxiliary battery that needs replacing.

Don’t ask how I know...

 

[Lightsped]

An O2 sensor going bad? I have 6700 miles so far. Would they go bad this quick?

 

[aldo98229]

I use that trick with my Mercedes Sprinter work van, used to light up my dashboard like a Christmas tree lol

Ugh. My friends own a 2019 Mercedes Sprinter camper. That thing spends more time in the shop than on the road.

 

[AC87]

Ugh. My friends own a 2019 Mercedes Sprinter camper. That thing spends more time in the shop than on the road.

I'm incredibly lucky the company I work for pays for fuel, service, parts, anything and everything related to my sprinter. Otherwise, I would probably not make it financially lmao. I remember I picked it up once from service, oil, filter, tire rotation, coolant flush came to $950 lmao
I probably average 2-3 total break downs/tow a year

 

[aldo98229]

I'm incredibly lucky the company I work for pays for fuel, service, parts, anything and everything related to my sprinter. Otherwise, I would probably not make it financially lmao. I remember I picked it up once from service, oil, filter, tire rotation, coolant flush came to $950 lmao
I probably average 2-3 total break downs/tow a year

Yeah. Last year, they got stranded camping in Coos Bay, Oregon. They had to wait sixteen (16) hours for the tow truck to show up and take them to the nearest Mercedes-Benz dealership, 3-4 hours away. Thankfully they had water, food and heating onboard for several days.

Two weeks ago, returning back from a month-long trip to NM, AZ, UT, WY and MT, the dashboard started lighting up like a Christmas tree. Thankfully they were 2 days away from home. The van went straight to the shop.

They love the comfort and convenience of their camper, but they don’t trust Mercedes-Benz reliability. They are now considering selling it, and getting a full-size pickup and putting a camper on it.

 

[Remorseless]

An O2 sensor going bad? I have 6700 miles so far. Would they go bad this quick?

Pretty sure it was a joke. IMO, find a scanner and see if you can pull any codes. That'll inform your next steps.

 

[Heimkehr]

An O2 sensor going bad? I have 6700 miles so far. Would they go bad this quick?

Any component on a vehicle can fail at any time. That's just the nature of mechanical things.

My 1995 YJ, purchased new, required warranty replacement of the short block due to "piston slap" (incorrect cylinder boring at the factory.) The vehicle was just a few months old at the time, and still had its new Jeep smell.

My 1996 VW Golf, purchased new to replace the lemon YJ that was sold back to Jeep, required warranty replacement of a spark plug coil, the failure of which prevented engine running. The vehicle was just a few weeks old at the time, and still had its new car smell.

A few months after purchasing our 2010 CR-V, it required warranty replacement of a rear wheel bearing.

All of the foregoing was unexpected, but it happened and I dealt with it.

 

[mwilk012]

Pull the codes, then come back. It’s fully impossible to diagnose without access to the vehicle or at least some bare minimum diagnostic data.

 

[Murphydog]

An O2 sensor going bad? I have 6700 miles so far. Would they go bad this quick?

FWIW, mine was the gas cap. Happened ~ 1,500 miles. First the actual gas cap light came on. Checked the gas cap and the light went away. About 2 weeks later the CEL came on. Took it in, the dealer checked the codes, and ordered a new gas cap as they didn't have a replacement in stock. Called me a a few days later, swapped out the cap (FCA wanted the old one back as part of the warranty process) and the CEL has not come on again. Now have 8,500 miles on it.

Hopefully it is something simple for you as well

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