Catalyst System Efficiency Below Threshold (Bank 1) (P0420)
MONITOR DESCRIPTION
The ECM uses sensors mounted in front of and behind the Three-Way Catalytic Converter
(TWC) to monitor its efficiency.
The first sensor, the air fuel ratio sensor, sends pre-catalyst information to
the ECM. The second sensor, the heat ...
Reassembly
REASSEMBLY
PROCEDURE
1. REPAIR INSTRUCTION
2. INSTALL REAR DOOR OUTSIDE MOULDING
3. INSTALL REAR DOOR LOWER OUTSIDE STRIPE
4. INSTALL NO. 2 BLACK OUT TAPE
5. INSTALL REAR DOOR OUTSIDE STRIPE
6. INSTALL REAR DOOR UPPER WINDOW FRAME MOULDIN ...
Diagnosis System
DIAGNOSIS SYSTEM
1. DESCRIPTION
(a) Data of the system can be read from the Data Link Connector 3 (DLC3) of the
vehicle. Therefore, when the system seems to be malfunctioning, use the Techstream
to check for a malfunction and repair it.
2. CHECK DLC3
( ...