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Hello, I apologize if this topic has been covered, but I couldn't find this exact issue after a search, so if it has please point me in the right direction. As part of a top end rebuild on my 2000 six speed hatchback, I installed a 102mm LS2 throttle body https://www.speedmaster79.com/102mm-...e-Body-Natural along with a harness adapter https://www.summitracing.com/parts/sum-890106. The car started on the first attempt, but I'm getting several throttle body and pedal sensor codes, P1120, 1220, 1221, 1275, 1276, and 1516. I've checked the connections and I think it's wired correctly, so I'm not sure how to proceed and would appreciate any suggestions.
Last edited by stephenwt; Feb 27, 2022 at 05:39 PM.
Reason: Split word
Have you tried clearing the codes and seeing if they come back? Do they have a H, C, or HC next to them? Lots of times the PCM will set a code if it loses continuity with something. I'm not sure if that would be the case with the throttle body specifically, but it might be a way to narrow down if it's an active problem, or just a remnant from the job.
The codes are all current, even after a reset. Apparently, the six pins on the throttle body do not match the Corvette harness pins, but possibly the f-body harness. So it appears I have to rearrange four of the harness wires.
This is what you need. I should have remembered that from my LS3 swap where I used a LS2 throttle body. That product should do all the pin adapting you need.
Several codes after throttle body replacement
