Testing and Inspection for Oxygen Sensor - Component Tests and General Diagnostics
Step 3
TROUBLESHOOTING HINTS
Hint 1: The exhaust gas purification performance will worsen if there is a malfunction of the heated oxygen sensor.
Hint 2: If the heated oxygen sensor output voltage deviates from the standard value even though the results of the checking of the heated oxygen
sensor are normal, the cause is probably a malfunction of a component related to mixture control.
Examples
1. Malfunction of an injector.
2. Air leakage into the intake manifold from a leaking gasket.
3. Malfunction of the intake air temperature sensor, the manifold absolute pressure sensor, or the engine coolant temperature sensor.
With California Emissions
Step 1
Step 2