answersLogoWhite

0

What does code p0420 mean?

User Avatar

Wiki User

βˆ™ 2010-09-15 04:48:48

Best Answer

Code P0420 means "Catalyst System Efficency Below Threshold (Bank 1)" P0420 is actually Catalyst System Efficiency Below ThresholdCatalyst System Efficiency Below Threshold. This means that the secondary O2 sensor detects that the catalytic converter isn't working as efficiently as it should. This engine code can be triggered by any one of the following:

1.) The catalyst in the catalytic converter is cracked, clogged, or otherwise damaged.

2.) The secondary O2 sensor is malfunctioning.

3.) There is an exhaust leak.

4.) The computer unit is faulty.
Trouble code P0420 means: Catalyst Efficiency Below Normal (Bank 1)

User Avatar

Wiki User

βˆ™ 2010-09-15 04:48:48
This answer is:
User Avatar
Study guides

Add your answer:

Earn +20 pts
Q: What does code p0420 mean?
Write your answer...
Submit
Still have questions?
magnify glass
imp
People also asked