320cdi P2A00 error won't go away

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anparkinson

New Member
Joined
Jul 4, 2020
Messages
17
Location
Tn339qa
Car
CLS 320
My 2009 320 CDI CLS gives me P2A00 error code meaning a voltage reading from the oxygen (O2) sensor is outside of normal parameters.

My car only has 1 sensor behind the Cat and no DPF. I have replaced the sensor with a new one but still get the error after resetting it. The car seems to drive fine.

The connection is clean and all wiring looks good.

Is there something else I'm missing that could be tripping the error?
 
Had the same on mine and changed the o2 sensor and code would not delete. Finally got rid of it when I had it re-mapped and the garage removed the code for me. So probably needs STAR to reset it.
 

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