Check Engine Light Come On 1997 E420

Check Engine Light Come On And On The Cluster It Say Engine Electronics Do I Have To Take It Back To The Dealer But The Car Work Fine

 

May be the MAF sensor. It's a well documented problem with the M104 engine but not sure how common it is for the V8. Had to have mine replaced last year at the dealership. $$$

 

CEL will be something to do with emission, problem is, where?

You may want to call around to some local part stores before taking it back to the Stealership. Many places have the equipment for reading the error code so you can determine the origin of the problem. I have taken mine to Autozone in the past -- no charge.

Good luck.

 

You should take it to someone that has a reader so that you can find out what the code is.

It could be something as simple as a loose gas cap.
You might want to tighten that. Also if this seal is old, you may need to get a new cap.

 

My Check Engine Light (CEL) comes on and off. It happens a few times after I refill the gas, but luckily it goes away. I always make sure the gas cap is tight after every refill.

 

Just today, (Tues 5-3) my check engine light came on on a trip across the mountains in Washington State going towards the Seattle area. After about 60 more miles of driving and three stops and engine restarts along the way, the CEL stayed off and did not come back on in the last 100 mile leg of my trip.

I was going to get right on here and ask about what could have caused it, but I probably need to go somewhere that the codes can be read or something. I looked at the engine temp all the way while the light was on and it seemed normal. First stop, I checked the coolant level - fine, oil level - fine, and did not notice any poor running condition.

Hope all is well with it and it was a fluke. I'll look at the gas cap. Car has 93K miles.

Thanks for reading,

Brian - Yakima, WA
2000 E320

 

One more thing about the gas cap is that you usually can't see any damage or deformity visually.
The rubber seal usually just gets compressed over time and is hard to visually see any damage.

Might want to get a new cap.
It's pretty cheap.