7099270

1.

Connect GDS to Data Link Connector(DLC).

2.

Warm up the engine to normal operating temperature.

3.

Monitor HO2S(S1)_UP related parameter on the "Current Data" with GDS.

4.

Is the "HO2S(S1)_UP" parameter displayed correctly?

	▶ Fault is intermittent caused by poor contact in the sensor’s and/or ECM/PCM’s connector or was repaired and ECM/PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and go to "Verification of vehicle Repair" procedure.
	▶ Go to "Terminal and Connector Inspection" procedure. note This DTC might be caused by the malfunction of Heater circuit, so, check the heater circuit first.