BenzWorld Junior Member
Date registered: Nov 2006
Vehicle: c280 sport, 1998, 147000
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Everyone with P0410 code - read this first
My Car: 1998 c280 sport
Well, I have been dealing with P0410 code for over 6 months. Finally got it!!! So I have decided to share with everyone.
The the initial problem was the left diverter valve. Unfortunately by the time I got the engine light with p0410 code the engine head air passage way was completely clogged.
As a preventive maintenance I replaced both diverter valves and vacuum hoses. The mechanic wanted $1500 to pull the head and clear the passage.
Hmmm, I decided to call Villy, the mechanic from Great Neck NY, to find out is there any way to clear the air passage without taking the head out. Initially he was confirming that the only way to clean it was to remove the head but as the conversation continued he reveled following technique.
Purchase FRIZOL PENETRATING SOLVENT (4 Oz)
Let the engine cool
Remove both diverter valves (careful not to broke the round end)
Locate the holes underneath left/right diverter valves and pour in half of penetrating solvent in each hole.
If the air passage is clogged you will not be able to pour more that half bottle (2 oz).
Repeat the process every 12 hours for few days
Install diverter valves and start the car, preferable outdoor because of the smoke.
Drive the car for 15-20 miles.
if you are not successful the first time, repeat the process.
You may need to do this 3-4 times, but it will clear the air passage.
Once the air passage/s is/are clean purchase and poor in about 2-3 oz of Berryman B-12 Chemtool Carburetor, Fuel System and Injector Cleaner in each hole. Wait 3-4 hours and drive the car for 20-30 min.
It took me 2 weeks and 6 bottle of FRIZOL and a few oz of Berryman B-12. As a preventive maintenance I will do this once a year or maybe more often.
Also, be aware that the air pump starts when the engine is cold and will purge the air through the exhaust for about 50-60 sec. However the pump will run again for short time (~5 sec) once the engine reach working temperature (~80C). At that time, both bank1 and bank2 sensor 1 should read < 0.10v. In the morning the sensors are cold and in resistive mode (0.45v) until they are hot enough. Let the engine run until it reaches working temperature and jump start the pump. Use OBDII reader with live data and read both bank1 and bank2 sensor 1 while the pump is ON. Make sure you don't run the pump for longer than 1 min. Both bank1 and bank2 sensor 1 should read < 0.10v while the pump is ON and engine is in working temperature.
Also, once a year I will use B-12 Chemtool® Total Combustion System Cleaning Kit.
Hopefully this article and my experience will help someone, but please note that the advice contained in this article (post) is for information purposes only and I shall not be held responsible for any damage caused to your engine should this arise.
Last edited by novafirst; 09-22-2012 at 03:03 PM.