help me out please. - BMW Forum

photoguy30523 · 08-13-2007, 09:15 PM

well i am getting code 1221 what could it be and what to check for?

Starmavin · 08-13-2007, 11:05 PM

This code pops up if the sensor is unplugged, bad, or it's readings are out of range (way too rich, way too lean) Test the O2 sensor with a volt meter, and check the connector by the (false) battery tray in the engine compartment and under passenger side of the car about mid way. Also check the o2 relay.

photoguy30523 · 08-14-2007, 04:25 PM

Quote:

Originally Posted by Starmavin

This code pops up if the sensor is unplugged, bad, or it's readings are out of range (way too rich, way too lean) Test the O2 sensor with a volt meter, and check the connector by the (false) battery tray in the engine compartment and under passenger side of the car about mid way. Also check the o2 relay.

where can i find the relay

Starmavin · 08-14-2007, 11:47 PM

If yours is a 325, its the rear most relay in the black L-shaped cover in front of the driver's side shock tower.