KILLER4V Posted April 10, 2013 Report Share Posted April 10, 2013 Just want to see if this P0430 code is normal for stage 4 LMS tune with race gas cleared it and hasn't shown up yet. Quote Link to comment Share on other sites More sharing options...
EcoBoostSHO Posted April 10, 2013 Report Share Posted April 10, 2013 I believe this has happened to some others with race gas. It goes away when you go back to 93 octane. I assume the race gas doesn't have lead in it does it? Cuz that would be bad. Quote Link to comment Share on other sites More sharing options...
turbodave Posted April 10, 2013 Report Share Posted April 10, 2013 1. What is the 0430 code point to?? 2. If your race gas is leaded that would be very bad. It'll quickly kill the narrow band O2 sensors in the system. Wouldn't do the Wideband's much good either, but they can tolerate it longer. Quote Link to comment Share on other sites More sharing options...
brucelinc Posted April 10, 2013 Report Share Posted April 10, 2013 Probably more than you want to know: CATALYST EFFICIENCY MONITOR The Federal Test Procedure Catalyst Efficiency Monitor is an on-board strategy designed to monitor and determine when a catalytic converter has deteriorated below the minimum level of effectiveness in its ability to control exhaust emissions. This monitor relies mainly on the front and rear Heated Oxygen Sensors (HO2S) to infer catalyst efficiency based upon oxygen storage capacity. The front and rear HO2S switches are counted under specified conditions for the purpose of calculating a rear-to-front HO2S switch ratio. After the switch ratio is calculated, it is compared against an emission threshold value. If the switch ratio is greater than the emission threshold, the catalyst has failed. The oxygen storage capacity of a high efficiency catalyst will have a low switch ratio and high HC efficiencies. As catalyst efficiency degrades, its ability to store oxygen declines and it will begin to have a higher switch ratio and low HC efficiencies. In general, as catalyst efficiency decreases, the switch ratio increases. Inputs from the ECT, IAT and TP sensors are required to enable the Federal Test Procedure Catalyst Efficiency Monitor. If the switch ratio is greater than the emission threshold, the catalyst has failed and a Diagnostic Trouble Code (DTC) is stored. These are: P0420= Bank 1 Catalytic Convertor below minimum efficiency P0430= Bank 2 Catalytic convertor below minimum efficiency Quote Link to comment Share on other sites More sharing options...
Livernois Motorsports Posted April 11, 2013 Report Share Posted April 11, 2013 Does your car still have cats? If not, we can shut off the rear 02's. If so, the race gas probably caused it to set the code. -Rick Quote Link to comment Share on other sites More sharing options...
KILLER4V Posted May 8, 2013 Author Report Share Posted May 8, 2013 Ran 93 octane for a couple weeks and the code cleared by it self Quote Link to comment Share on other sites More sharing options...
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