SMU - Revised DTC P0420 Catalyst System Low Efficiency
| Subject: | Revised DTC P0420 Catalyst System Low Efficiency |
| Models: | 1996-2001 Chevrolet/Geo Metro |
| 1996-2004 Chevrolet/Geo Tracker |
| 1996-1997 Pontiac Sunrunner |
| 1996-2001 Pontiac Firefly |
Built with the following engines:
Engine | Model Year | Model |
|---|---|---|
1.0L Engine VIN 6 -- RPO LP2 | 1996-2000 | Chevrolet/Geo Metro Pontiac Firefly |
1.3L Engine VIN 9 -- RPO L72 | 1997 | Geo Metro Pontiac Firefly |
1.3L Engine VIN 2 -- RPO LY8 | 1998-2001 | Chevrolet Metro Pontiac Firefly |
1.6L Engine VIN 6 -- RPO L01 | 1996-1997 | Pontiac Sunrunner |
1996-2002 | Chevrolet/Geo Tracker | |
2.0L Engine VIN C -- RPO L34 | 1999-2004 | Chevrolet Tracker |
2.5L Engine VIN 4 -- RPO LE8 | 2001-2004 | Chevrolet Tracker |
This bulletin is being issued to revise Step 8 of DTC P0420 Catalyst System Low Efficiency in the Engine Controls sub-section of the Service Manual. Please replace the current information in the Service Manual with the following information.
The following information has been updated within SI. If you are using a paper version of this Service Manual, please make a reference to this bulletin on the affected page.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
8 |
Important: Before installing the replacement converter, locate and repair the cause of the TWC converter failure. Replace the three-way catalytic converter and the warm-up three-way catalytic converter (WU-TWC), if equipped. Is the action complete? | -- | Go to Step 10 | -- |
