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Discussion Starter #1
Engine light came on so I did the ignition 'thingy' and the engine error code is

P 0420

Can anyone tell me what this means and how do I clear it?

Regards and thanks in advance.

Mark
 

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P0420 = catalyst efficiency failure . only the stock pcm watches for the cat doing its job.
Disconnect neg. battery terminal for a minute or so.. then reconnect. Code goes bye, bye.

Dont know if this helps but found it on the srt8 forum!
 

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use it!

Engine light came on so I did the ignition 'thingy' and the engine error code is
P 0420
Can anyone tell me what this means and how do I clear it?
Regards and thanks in advance.
Mark

Mark,

Your Diablo tuner will easily read and interpret the codes for you, then clear them.
 

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Registered
Joined
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491 Posts
Discussion Starter #5
P0420 = catalyst efficiency failure . only the stock pcm watches for the cat doing its job.
Disconnect neg. battery terminal for a minute or so.. then reconnect. Code goes bye, bye.

Dont know if this helps but found it on the srt8 forum!


Thanks guys, I was about to clear it but it went off..so everything is good, thanks.

Mark
 
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