Honda Accord: Warm Up TWC Removal/Installation - Catalytic Converter System - Fuel and Emissions - Honda Accord MK8 2008-2012 Service ManualHonda Accord: Warm Up TWC Removal/Installation

1. Raise the vehicle on a lift.

2. Remove the secondary H02S (Sensor 2) (see page 11-197).

3. Remove the bolts (A).

4. Remove the WU-TWC bracket (B).


4. Remove the WU-TWC bracket (B).

5. Lower the vehicle.

6. Remove the frame brace (see page 20-306).

7. Remove the A/F sensor (Sensor 1) (see page 11-197).

8. Remove the upper converter cover (A).

9. Remove the WU-TWC (B) and the gaskets (C).


9. Remove the WU-TWC (B) and the gaskets (C).

10. Remove the converter cover (A).

11. Install the parts in the reverse order of removal with


11. Install the parts in the reverse order of removal with new gaskets.

    DTC Troubleshooting
    DTC P0420: Catalyst System Efficiency Below Threshold NOTE: - Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information (see pa ...

    Under-floorTWC Removal/Installation
    1. Raise the vehicle on a lift. 2. Remove the exhaust pipe hangers (A). 3. Remove the under-floor TWC (B). 4. Install the parts in the reverse order of removal with new gaskets (C) and new s ...

    See also:

    Folder Repeat
    This feature, when activated, replays all files in the selected folder. To activate folder repeat mode, select FOLDER REPEAT by using the interface knob, and press ENTER on the interface sel ...

    DLC Circuit Troubleshooting
    NOTE: If you suspect the HDS or the HDS DLC cable may be the source of the communication probrem, verify that they are working properly by connecting them to a known-good, like vehicle and system, ...

    How to Set Readiness Codes
    Malfunction Indicator Lamp (MIL) Indication (In relation to Readiness Codes) The vehicle has certain readiness codes that are part of the on-board diagnostics for the emissions systems, If the veh ...