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01-09-2018, 07:35 PM
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#1 |
 Drives: 2011 Chevy Camaro LS Join Date: May 2016
Location: Texas
Posts: 68
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catcleaner
so i have an error code " P04020 " which apparently is " catalyst system low efficiency (Bank 1 )"
indicates that the Bank 1 Catalyst system efficiency was below threshold for a predetermined period of time. anybody know how to fix it? someone told me to use the Catcleaner. i have to put it in the gas tank when my gas is at 1/4 of gas. which is 4.05 Gallons. will that be pass half a gallon? almost to full? and do you think this might resolve the issue for the error code p04020? PS : I Recently changed my cars battery to a 790 crank. 
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01-09-2018, 10:42 PM
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#2 | |
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Captain Gingerbeard
Drives: 2012 IOM RS/SS 6MT Join Date: Mar 2013
Location: West Twin Cities, MN
Posts: 2,489
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You probably just need a new O2 sensor.
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Custom ordered 2012 6MT RS/SS on 11/25/2011. Picked up 01/31/12.
Pedders Coilovers, BMR trailing arms and toe-links, Prothane solid poly subframe bushings, JDP Motorsports rear upper control arm bushings, Texas Speed long-tube headers with 2" primaries, modified fully 3" Magnaflow competition catback. CAI cold-air intake. DBA rotors, Hawk pads. Quote:
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