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Component Inspection

■ Check HO2S

Visually/physically inspect the following conditions:

▶ Ensure that the sensor is securely installed

▶ Check for corrosion on terminals

▶ Check for damaged wiring

▶ Repair as necessary and go to next step

Warm up the engine to normal operating temperature and let it idle.

Connect Scantool and monitor the O2 SNSR VOL.-B1/S2 parameter on the Scantool data list.

Specification : Above 0.7V at idle

Is sensor data near the specified value?

	▶ Check for poor connection between PCM/ECM and component: backed out terminal, improper mating, broken locks or poor terminal to wire connection. Repair as necessary and go to "Verification of Vehicle Repair" procedure.
	▶ Check HO2S for contamination, deterioration, or damage. Substitute with a known-good HO2S and check for proper operation. If the problem is corrected, replace HO2S and then go to "Verification of Vehicle Repair" procedure.