Impala Forums banner

1 - 4 of 4 Posts

·
8th Gen Antagonist
Joined
·
13,660 Posts
I think that's because there is no such code, did you perhaps mean P0420?
 

·
Banned
Joined
·
97 Posts
Were would i diagnostics procedures for this code ? i tried searching the web, but no luck.
It can mean these things


Leaded fuel was used where unleaded was called for

A damaged or failed oxygen sensor (HO2S) Downstream oxygen sensor (HO2S) wiring damaged or connected improperly

The engine coolant temperature sensor is not working properly

Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
Retarded spark timing
The oxygen sensors in front and behind the converter are reporting too similar of readings
Leaking fuel injector or high fuel pressure Cylinder misfire Oil contamination
 
1 - 4 of 4 Posts
Top