Take the tour ×  My 2003 focus lx 2.0L L4 SOHC ~18,000 miles has
had the engine light so i went to autozone to read the code.
Autozone obd2 printout says "P2195 lack of heated oxygen sensor-
Bank 1 Sensor 1 HO2S11 switch- sensor indicates lean."  Autozone
said "Your car is burning more fuel. It's a common problem. It's
usually the 1st sensor to go out. It's possibe to DIY. It looks
like a spark plug in the exhaust pipe before the catalytic
converter by exhaust manifold."  I checked with Herko Automotive
Group and they said "For your car 2003 FORD FOCUS 2.0L L4 SOHC
in the position sensor 1 (Upstream) you need the oxygen sensor
number SG1813."  How reliable is this advice from autozone &
herko? Should i just replace the sensor or what's the next
likeliest fix for this?  I think I see where the bank 1 sensor 1
is located in front of the engine, but can someone post a pic
highlighting the location?  share|improve this question add
comment  2 Answers  since installing new 02 sensor engine light
has not reappeared