My 90E320 throws that code and sometimes on startup it dies after a coupla
seconds but then restarts and runs OK. The supposed fix is to get under the
intake manifold and fix some leaking hoses. They are impossible to reach
without doing that and I’m too lazy to fool with it.
--FT
Sent from
Our E320 has that code. I know the pump runs. My brother tells me there's
a sensor, which is how it knows that air pressure is insufficient. Sensor could
fail, one-way valve could fail, hoses could fail...
For now, it's just a cheery little orange 'hi-there' light on the dash...
-- Jim
FWIW.
Most European cars of that era have secondary air pumps.
The concertina pipes that connect the air pump to the EGR system turn into
Rice Krispies after about 10 years.
Leaky tubes will set an alarm.
YMMV.
Fred
On Fri, Dec 10, 2021 at 7:36 PM Robert Koziak via Mercedes <
Hi all,
My daughter's 2011 C300 (90K) had a check engine light with a code P0410
indicating an issue with the secondary air pump. I replaced the secondary pump
(which was evidently seized) and reset the code. Drove it about 50 miles with
no check engine light so I returned the car and
