CODE P0420
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03-09-2008, 09:17 AM
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#2
03-09-2008, 12:22 PM
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03-09-2008, 01:24 PM
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RE: CODE P0420
ORIGINAL: lateralus823
I have the code p0420 what is it? and could it cause me to run to rich?
I have the code p0420 what is it? and could it cause me to run to rich?
https://dodgeforum.com/m_614377/tm.htm
P0420 Catalyst System Efficiency Below Threshold (Bank 1)
could be bad O2 sensor (will make you run rich) or cat converter or a reminder to blaze a fat one
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03-09-2008, 01:53 PM
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#5
03-09-2008, 02:09 PM
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#6
03-28-2008, 04:14 PM
RE: CODE P0420
Gutted cat is the problem. More info on the code: http://www.obd-codes.com/p0420
Your options are live with the code, replace the cat, or put on a high-flow cat.
Your options are live with the code, replace the cat, or put on a high-flow cat.
#7
03-28-2008, 04:18 PM
RE: CODE P0420
ORIGINAL: neoncrazy101
if the cat is gutted Bank 2 sensor could be messing up. Bank 1 is before the Cat. Bank 2 is after.
if the cat is gutted Bank 2 sensor could be messing up. Bank 1 is before the Cat. Bank 2 is after.
For example, you could have the same description for Bank 1, Sensor 1. Or it could be for Bank 1, Sensor 2. Or Bank 2, Sensor 1, etc.
A P0420 usually means the cat is bad. In this case that's a given. The code will not go away until the cat is replaced. Beware cheap, inferior cats that don't last!
http://www.obd-codes.com/p0420