Honda Accord: Component Location Index
Eighth generation (2008–2012) / Honda Accord MK8 2008-2012 Service Manual / Fuel and Emissions / Catalytic Converter System / Component Location Index

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 ...
See also:
Component Location Index
Front
4-door Rear
...
Fuel Information
• Fuel recommendation
Use of a lower octane gasoline can cause a persistent, heavy metallic
knocking noise
that can lead to engine damage.
• Top tier detergent gasoline
Because the level ...
Circuit Diagram
...
