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GTO_Gregory · 06-30-2020, 08:08 PM

Here's my two-cents.

1. In HPTuners VCM Scanner connect to the vehicle while running and look for errors. If any are listed, click on the little engine in the tool bar with the pop out label of "Diagnostics and Info." A small window will open with the DTC (fault(s) listed). Highlight the items and press the red X at the top of the menu. This will erase the fault and give you a blank slate. Scan again and see if you get the same faults. If you do, erase the faults again, then make the suggested change below to turn off the sensor.

2. Leaving a check in the box keeps the sensor enabled. Hence, it will report something.

3. If anything set the Error Mode item to "No MIL Light." This will turn off any "check engine" light from the fault.

4. Check the HPTuners forum to verify this, but you should be okay.

If Utah doesn't sniff your exhaust for carbons you should be okay.

MIL stands for Malfunction Indicator.

P0420 Catalyst System Efficiency Below Threshold (Bank 1)

p0430 Catalyst System Efficiency Below Threshold (Bank 2)

06-30-2020, 08:08 PM	#2
GTO_Gregory Drives: 2016 Camaro Join Date: Oct 2017 Location: Texas & Uncle Sam's Choice Posts: 123	Here's my two-cents. 1. In HPTuners VCM Scanner connect to the vehicle while running and look for errors. If any are listed, click on the little engine in the tool bar with the pop out label of "Diagnostics and Info." A small window will open with the DTC (fault(s) listed). Highlight the items and press the red X at the top of the menu. This will erase the fault and give you a blank slate. Scan again and see if you get the same faults. If you do, erase the faults again, then make the suggested change below to turn off the sensor. 2. Leaving a check in the box keeps the sensor enabled. Hence, it will report something. 3. If anything set the Error Mode item to "No MIL Light." This will turn off any "check engine" light from the fault. 4. Check the HPTuners forum to verify this, but you should be okay. If Utah doesn't sniff your exhaust for carbons you should be okay. MIL stands for Malfunction Indicator. P0420 Catalyst System Efficiency Below Threshold (Bank 1) p0430 Catalyst System Efficiency Below Threshold (Bank 2) __________________ 2024 Chevrolet 3500HD Z71, LTZ, 4x4, 6.6 ltr. L5P long-bed. 2016 Camaro 2SS Six-speed, Hotchkis sway bars, Eibach .750" drop springs, Mamo throttle body, E85, BMR stuff. 2006 Quicksilver 6-speed GTO ERL LS3-430, All-Pro 285cc heads, 262/273 .758/.742 116+3 cam, Sheet-metal Intake, 70lb Siemens injectors, SLP, GMM Ripshifter, QA1 Coil-overs front and rear, nylon suspension bushings, Hotchkis, RPM Trans, SPEC twin clutch, SpinTech, Kooks 1 7/8 -2.0", BMR drive train, Kaaz 3.91, Lingenfelter CAI, Baer brakes, mini-tubs, E85.