(h) Lean: During the Control the Injection Volume for A/F Sensor Active Test, the air fuel ratio sensor output voltage (AFS Voltage) is
consistently more than 3.4 V, and the heated oxygen sensor output voltage (O2S) is consistently less than 0.4 V.
Rich: During the Control the Injection Volume for A/F Sensor Active Test, the AFS Voltage is consistently less than 3.1 V, and the
O2S is consistently more than 0.55 V.
Lean/Rich: During the Control the Injection Volume for A/F Sensor Active Test, the output voltage of the heated oxygen sensor
alternates correctly.
D -- INSPECT FOR EXHAUST GAS LEAK
C -- INSPECT FOR EXHAUST GAS LEAK
B -- REPLACE AIR FUEL RATIO SENSOR See: Powertrain Management/Computers and Control Systems/Oxygen
Sensor/Service and Repair/Air Fuel Ratio Sensor/Removal
A -- Continue to next step.
3. INSPECT FOR EXHAUST GAS LEAK
(a) Inspect for exhaust gas leaks from the exhaust manifold sub-assembly and exhaust pipes.
OK:
No gas leaks.
NG -- REPAIR OR REPLACE EXHAUST GAS LEAK POINT
OK -- Continue to next step.
4. CHECK DTC OUTPUT (DTC P0420 AND/OR P0430)
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Engine / Trouble Codes.
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