GlosterVette
CCCUK Member
Hi All, I wonder if you can help? I’ve recently fitted long-tube headers and x-pipe to my 2006 Corvette base. The headers have the upstream (pre-cat) O2 sensors, but there are no downstream (post-cat) O2 sensors. I’ve connected HP Tuners to the car via MPVI3 and switched off all the DTCs related to sensor 2.
Version 5 of HP Tuners software doesn’t have an option to disable Catalyst Test, or to disable Post O2 Test.
What do I need to do, to ensure that won’t be a problem?
Note that I have to use V5 because I’ve got MPIV3. I’m now aware that if I’d bought MPIV2, I could’ve got V4 software and those disable options would’ve been available.
Also, I’ve heard mention that I should leave the rear O2 sensors connected, but just tie them out the way. Is that required? Unfortunately I found that out after fitting the headers, so I’ve already cut the rear sensors away.
If they’re needed, does anyone know the correct GM or aftermarket part numbers I need to order for downstream LS2 O2 sensors? I’ve seen a load of conflicting information.
Sorry, that’s a lot of questions. To make this useful, here’s some helpful data for others going through the process…
In V5 of their software, HP Tuners require you to do a training course before you can amend the emissions-related DTCs. It’s not that big a deal, but once you’ve done it and loaded your completion code into VFM Editor, I found I had to restart the software and re-read the data from the car to be able to access the emissions DTCs. Here’s a link to the instructions about how to do it: Emissions – HPTuners Europe.
Here are the DTCs I switched off… P0036 P0054 P0056 P0060 P0137 P0138 P0140 P0141 P0157 P0158 P0160 P0161 P0420 P0430 P2A01 P2A04
I also switched off Catalyst over temperature protection.
Version 5 of HP Tuners software doesn’t have an option to disable Catalyst Test, or to disable Post O2 Test.
What do I need to do, to ensure that won’t be a problem?
Note that I have to use V5 because I’ve got MPIV3. I’m now aware that if I’d bought MPIV2, I could’ve got V4 software and those disable options would’ve been available.
Also, I’ve heard mention that I should leave the rear O2 sensors connected, but just tie them out the way. Is that required? Unfortunately I found that out after fitting the headers, so I’ve already cut the rear sensors away.
If they’re needed, does anyone know the correct GM or aftermarket part numbers I need to order for downstream LS2 O2 sensors? I’ve seen a load of conflicting information.
Sorry, that’s a lot of questions. To make this useful, here’s some helpful data for others going through the process…
In V5 of their software, HP Tuners require you to do a training course before you can amend the emissions-related DTCs. It’s not that big a deal, but once you’ve done it and loaded your completion code into VFM Editor, I found I had to restart the software and re-read the data from the car to be able to access the emissions DTCs. Here’s a link to the instructions about how to do it: Emissions – HPTuners Europe.
Here are the DTCs I switched off… P0036 P0054 P0056 P0060 P0137 P0138 P0140 P0141 P0157 P0158 P0160 P0161 P0420 P0430 P2A01 P2A04
I also switched off Catalyst over temperature protection.