DTC P0420 THREE WAY CATALYST FUNCTION - Diagnostic Procedure (Cont'd)
EF & EC-7190flowchartCG10, CGA3
Diagnostic Procedure (Cont'd)
Diagnostic Procedure - Steps 7 to 8
1
7. CHECK INJECTOR: 1. Turn ignition switch "OFF". 2. Remove injector assembly. Refer to EC-7025. Keep fuel hose and all injectors connected to injector gallery. 3. Disconnect camshaft position sensor harness connector. 4. Turn ignition switch "ON". Make sure fuel does not drip from injector.
2
OK or NG
NG (Drips)
Replace the injector(s) from which fuel is dripping.
OK (Does not drip) - GO TO 8
3
8. CHECK INTERMITTENT INCIDENT: Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT", EC-7070.
Trouble is not fixed
Replace three way catalyst.
Trouble is fixed
INSPECTION END
See also
EC-7025 · EC-7070