P0141

Wiring Diagram:

CIRCUIT DESCRIPTION
This system controls operation (ON/OFF) of each heater which assists activation of each oxygen sensor. ECM (PCM) turns the each heater of oxygen sensor -1 and -2 ON (to allow the electric current to flow to the oxygen sensor heater) when the engine is running without high-load condition after specified time from engine start.

Detecting Condition / Possible Cause:

DTC CONFIRMATION PROCEDURE
1. Turn ignition switch OFF once and then ON.
2. Clear DTC, start engine and warm up engine to normal operating temperature.
3. Keep it at 2000 r/min for 2 min.
4. Check pending DTC in "ON BOARD TEST" or "PENDING DTC" mode and DTC in "DTC" mode.

Step 1 - 3: