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95 E320 Check Engine Light Code 2

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Doug Wooding's picture
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My check engine light is on. I checked the code, 2 blinks on the LED. I understand that this is the O2 Sensor. I purchased the car with 60k and now have over 100K miles. I don't think they have ever been replaced so I am hoping this will solve the problem. California Smog due in April and it will not pass with light on. How many sensors are there? Can I change these myself? New Wiring Harness last year.

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Doug Wooding's picture
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Re: 95 E320 Check Engine Light Code 2

I am a bit of a novice at this so I am not sure which socket I tested. There is an access port near the battery, numbered 1 to 16. It has a button in position 2 and a LED in position 4. I assume this is socket 3. I push the button with key on as described in some posting I read and I get 2 Flashes. Testing again, on more flashed and check engine light goes off for some period of time. Where is socket 8 located and how do I test it? I changed the Engine Control wiring harness last year as the insulation was disintegrating so I don't think I have a wiring problem unless it is directly related to the O2 sensor.

Thanks,

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garthnorton's picture
Saratoga, CA
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Joined: October 26th, 1995

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Vehicles
2002 SL500
2005 ML350
2011 E320 BLUETEC
Re: 95 E320 Check Engine Light Code 2

Hi Doug,

If I understand your enquire you need a new sensor. Replacement of the o2 sensor can be easily done. When I had the problem I called Anaheim Motors (Also Caliber Motors) in Anaheim and purchased the sensor for about 40% less than at the local dealer. When you see the part you will know exactly what to do. The sensor is just in front of the engine on the left side. I think the job took about 15 minutes. You will need to use your code reader to turn off the check engine light after the new part is installed.

If you have been at a high elevation the reduced oxygen will cause the check engine light to come on, after you have been back to a lower elevation the light will go out on its own. But, if this happens it is a signal that the sensor is on its way out and needs changing.

Good luck,

Garth

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Barry's picture
Hendersonville, NC
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Joined: July 24th, 2002

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2001 E320 Sedan
1994 SL500
Re: 95 E320 Check Engine Light Code 2

I once had a similar issue with my 95 E320 and it turned out to be a plugged EGR line that snakes across the back of the engine. Threaded some mechanic's wire through it and cleared out the carbon and it worked great.

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BG Brown
Hendersonville, NC

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