Circuit Description

WARNING: This page is about a different car, the 2003 Toyota Matrix and 2003 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Bank No. 1 refers to bank that includes cylinder No. 1.
Sensor No. 2 refers to farther sensor from engine body.

For circuit description, see DTC P0125: INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL . Detecting condition of DTC is when voltage output of heated oxygen sensor remains at 0.4 V or more, or 0.5 V or less when vehicle is driven at 25 mph (40 km/h) or more after engine is warmed up (2 trip detection logic).