When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Ran a GM Plug-n-play harness/ecu (E67)/pedal on an LS swap. After tune, it worked flawlessly. Ended up swapping out the harness and ECU for esthetic reasons and concealment. The ECU I used is a E38, coupled with the corresponding harness. Got everything placed and connected. Went to fire the vehicle. Starts/idles with no issue. Immediately got a P2138 code. Dead accelerator pedal.
Retraced all of my wires and made sure that everything was routed correctly. Upon ignition, I verified that the throttle blade "activated" and what-not. Throttle body is a NW 6-pin 102mm. Removed it to rule out that it wasn't faulty. Installed a cheap Amazon 6-pin tb. TB actuated upon ignition and starts the vehicle and idles ok. No accelerator pedal actuation with it, either. I disconnected the battery a few times to "reset" the ECU, to no avail.
What should I look for to resolve the issue? Are all DBW pedals the same? Could it be a tuning/ECU setting issue? What could I be missing?
Are you using the E67 pedal with the E38 ,or pedal that came with the E38?
Originally Posted by sixt9er
Ran a GM Plug-n-play harness/ecu (E67)/pedal on an LS swap. After tune, it worked flawlessly. Ended up swapping out the harness and ECU for esthetic reasons and concealment. The ECU I used is a E38, coupled with the corresponding harness. Got everything placed and connected. Went to fire the vehicle. Starts/idles with no issue. Immediately got a P2138 code. Dead accelerator pedal.
Retraced all of my wires and made sure that everything was routed correctly. Upon ignition, I verified that the throttle blade "activated" and what-not. Throttle body is a NW 6-pin 102mm. Removed it to rule out that it wasn't faulty. Installed a cheap Amazon 6-pin tb. TB actuated upon ignition and starts the vehicle and idles ok. No accelerator pedal actuation with it, either. I disconnected the battery a few times to "reset" the ECU, to no avail.
What should I look for to resolve the issue? Are all DBW pedals the same? Could it be a tuning/ECU setting issue? What could I be missing?
Would it be too much trouble to reinstall the E67 to see if the pedal still functions with that ECU?
I don't have the E67 ECM right in front of me, but are the harness connections the same on the E38 and E67? I know the E67 has three big connections on it, while the E38 has only two. My new harness is specifically for the E38, two connector type.
It documents that different pedals have different output voltage sweeps and that the wrong voltage sweep will give the exact code you are getting.
In short you need the correct pedal for your ECM.
Thanks, guys. I attempted to order a 2005-2013 Corvette acc pedal. There were only 6 in the country now, due to a GM national back-order. Called nine different dealerships. Found one in Texas. Hopefully it will work as intended. I shall keep you posted.
I was at the track earlier this year and a guy had a similar issue with a LS swapped 2nd gen. Turns out the pedal was bad. Replaced the pedal and problem was fixed.
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.
DBW pedal not operating 
