0420 trouble code keeps popping up i just replaced my catylact converter a few months ago. why does that code keep popping back up
Nov 6, 2009 at 12:01 PM
1997 Oldsmobile Bravada 0420 OBD code
AD142314
- MEMBER
- 6 POSTS
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Hello,
On some makes and model the code...
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
Indicates a bad O2 Sensor not the cat itself.
.
On some makes and model the code...
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
Indicates a bad O2 Sensor not the cat itself.
.
Nov 6, 2009 at 12:04 PM
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