You need a code reader or take it to Autozone/Discount Auto

 

You do need to pull the codes to find out why it is on, but if your gas cap is not on tight, it can cause the CEL. Easy to check and may be a quick fix. If it is the issue, you will need to drive a bit before the light goes out after you fix the issue.

 

It seems that the fuel tank cap is fine. I went to Autozone and found that Error Code is P143C. But I can not find its meaning. I will try to get a BMW specific code reader.

 

To OP, one google search says:

"P143C Engine Trouble Code

Meaning of P143C engine trouble code is a kind of powertrain trouble code and theoretically you can drive for a few weeks or even months with a broken MAF sensor. You will notice a decrease in gas mileage and over time the car will eventually start stalling a lot."

Another search says on a 2006 330i:

P143C -- Direct Ozone Reduction Catalyst Temperature/Radiator Coolant Temperature Correlation

And if yours is N26, 99% of CELs will be covered by 15-yr/150k-mile PZEV warranty.

 

Thank namelessman for the info, especially on 15-yr/150k-mile PZEV warranty. I don't remember that it was mentioned when I purchased the car. Its built date is 5/2013 and was bought in California. But I don't know if it has N26 or N20.

 

Service can read the key data to identify SULEV/PZEV. Also under the hood is a label that says SULEV, plus certifying the DOR radiator is an emission part.

 

Thanks for the website link.
Yes, my car has N26 engine. But I don't have to deal with BMW service at the moment as the CEL on my car went away within 2 hours after I spent $50 to order a Creator C110+ BMW Fault Code Reader
PZEV warranty seems to cover a lot of engine emission related issues. I found the parts list and attach it here

 

The fascinating thing is that, the same N26 has different parts covered in different model years, e.g. the dreaded timing chain is an emission part in 2016 328i!!! :thumbup:

CEL can be on and off, and service can diagnose the fault codes stored on ECU.

 

While I have been glad to know about the availability of PZEV warranty on my car, I am disappointed that I was not well informed by BMW of this warranty. I wonder what BMW service would do if I had one of covered issues fixed by them without mentioning the warranty?

 

The local service is on top of PZEV, as well as ELWs, both of which are highlighted in key data. SAs are very good at identifying chargeable items to BMWNA.

Having said that, owners can also become aware of PZEV components and coverage, and communicate with SAs as needed. Basically any CEL will be a good cue to the SAs and owners.

 

Here are the PZEV-related clauses in my 2013 F30 warranty book.

Manufacturer's Warranty Coverage:
***8211; For 15 years or 150,000 miles,whichever occurs first:
1. If your vehicle fails a Smog Check inspection, all necessary repairs and adjustments will be made by BMWNA to ensure that your vehicle passes the inspection. This is your emission control system PERFORMANCE WARRANTY.
2. If any emission-related part on your vehicle is defective, the part will be repaired or replaced by BMWNA. This is your emission control system DEFECTS WARRANTY.

 

That is true, e.g. if the DOR radiator, being an emission part, leaks(and such leaks may not trigger CEL), it will be covered by PZEV warranty.