my car had check engine light and i got it read it came out with code number p1136
when i checked what the code means it read as folows O2 Sensor Circ.,Bank1-Sensor2 Malfunction
i dont know if it is the actual o2 sensor or mass flow sensor bad.
if someone know can you please let me know
thanks

 

Check wiring to the sensor. Check for vacuum leaks. Unmetered air leaks will often throw this code. Check and make sure your gas cap has a good seal on it. If you know someone with a vagcom then get them to read it or invest in one yourself.

 

It's a lean code... Have you recently installed a boost gauge?