ok!...
... your car doesn't show a relay; so that means that your 02 sensors are connected directly to the DME(brain).
funny, but it's also showing that code "19" is not a valid code for your year model. Perhaps, before u go spending ur bucks, you can have someone pull the P codes for cross-confirmation.
TIP: heater circuits within the 02 sensor unit, is usually the cause of 02 sensor failure.
__________________ ay sino caddi ububblaem?   Heaven won't take me; and Hell just knows I'll take over...! | 
