My m104 smells lean,no codes except secondary air injection p0410 code.I have no full throttle,or can't run past 3,000 rpm.
What do you all think Maf or oxygen sensor,both have a 178,000 miles on them

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1999 w140, quit voting to old, and to old to fight, a god damned veteran,you are a citizen of the world, all peoples are
cousin's, love all life, your love is enternal

How long does it take for the code to come back on after you pull the battery?

Possible causes
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Inappropriate fuel pressure
- Faulty fuel injectors
- Intake air leaks may be faulty
- Exhaust gas leaks


Read more: http://engine-codes.com/p0140.html#ixzz2kTNVMLyt

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77' 300D, "Cartman" SOLD @ 150K (didn't know what I had)
83' 300SD, "The Superdon" 325k+ @ 28mpg
95 E320 wagon, "Millennium Falcon" 231k+ @ 24 Mpg
95 E300D, "Sherley" 308k @ 33.69 Mpg, currently anticipating a head
99 Suzuki Intruder "Trudy" @ 45 mpg

the code read secondary air injection.But I've check all smog devices,beside at full throttle no vacumm,it returns when you try full throttle. Again have had no cat for four years no code,and no egr.Engine almost virgin from smog devices

__________________
1999 w140, quit voting to old, and to old to fight, a god damned veteran,you are a citizen of the world, all peoples are
cousin's, love all life, your love is enternal