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2002 SLK32 AMG
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317 Posts
Discussion Starter · #1 ·
Hi,

Ever since replacing the head gasket nothing but trouble. Now there is secondary air injection code P0410 and the cat readiness monitor flashing. I was able to reset them 3 times but this time the cat rediness monitor has been flashing over 1000 miles. Also just replaced downstream O2 sensor. The upstream O2 sensor is less than 1 year old. Any ideas? I want to replace the cat. Any recommendations, stock or universal? Car has been driven over 210k miles. Thanks..
 

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*Premium Member
2001 SLK320
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2,088 Posts
There are numerous reasons for a P0140 code. There is lots of information on this forum if you search. There is also a lot on Benzworld.org in the ML section.

In my case it was the soldering issues on the K40 relay card.
 
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