Boyes50
March 25th, 2022, 01:33 AM
Hi Everyone,
At my wits end on this project and have surrendered to needing additional help from the community here. I will give a quick summary of the vehicle/engine/wiring application and the history leading up to this point. Car is a 2009 Pontiac G5. Engine is a LAP 2.2L Ecotec. Wiring Harness is original and uncut/modified. Has an E37 PCM. This is a track car and is completely stripped out, roll cage welded in, no interior. Car was running great and everything was working fine. Disconnected the battery one day to install a battery box, and when I reconnected the battery the VATS system activated for some reason and I had a no crank, no start sympton. Attempted key relearn, no luck. Took the car to a dealer and did a Tech-2 Security Relearn, still no luck. Dealer determined the issue was with the Key Transponder Module on the ignition switch itself. Rather than replacing this module, I decided I would simply flash in a tune with the VATS delete and carry on. Connected my V2 and Laptop, attempted a full flash, and Paul from EFILive determined the PCM had a Flash Memory failure. Now the PCM was scrambled and wouldn't take a flash, and had lost the vehicle VIN.
Purchased a used E37 from a scrapyard. Computer was from a 2009 and had the correct OS. Connected and full flashed in my VATS delete tune. Car runs! Completed the required clutch pedal relearn and CKP CASE Relearn, all good. Disconnected from EFILive, went to take the car for a drive, and after using the throttle pedal twice I get the "Reduced Engine Power" message and lose throttle control. Read codes and find the following codes - P0036, P0532, P0054, P0606, B2555, U2113, U2129, B3031, B3055. All of these codes make total sense for the car given the Airbag Module is removed (Ran fine for months since then), Rear O2s are removed (Ran fine for months since then), and interior lights are removed. Turning off the codes makes them no longer appear, but still gives the same "Reduced Engine Power" message. I turned them back on so I could monitor what causes the problem exactly. Clearing all codes and idling the car, all codes EXCEPT P0606 return. Rev the car up twice, pedal control goes away, P0606 comes back. The only thing at this point that I can think of is that P0606 is an Internal PCM fault, and when this happens the PCM goes into limp mode and takes away pedal control. With the car shut off, the Throttle Pedal reads the correct position at all times and the throttle body follows the throttle pedal correctly throughout the range. Is there any chance there is a Throttle Pedal Relearn required when replacing a controller? Everything I read on forums and diagnostic charts for this code indicates issues between the TAC APP Sensor and PCM Reading. All the Electronic Throttle Control tables are original and unmodified from the original tune which was pulled from the car.
At this point, my next steps I believe would be to purchase another PCM, this time which will be a brand new one, and flash in the tune and see if my problem was truly PCM related. The main issue at this point is cost, as EFILive has already replaced the failed Flash Memory license once (Thank you a ton guys) and doubt they will replace it again for this "New" PCM that appears to have once again failed. Suggestions and thoughts? Buy another PCM? Anything I can test to verify the PCM has an internal fault? I'll attach the file for anyone who wants to have a look as well.
24099
At my wits end on this project and have surrendered to needing additional help from the community here. I will give a quick summary of the vehicle/engine/wiring application and the history leading up to this point. Car is a 2009 Pontiac G5. Engine is a LAP 2.2L Ecotec. Wiring Harness is original and uncut/modified. Has an E37 PCM. This is a track car and is completely stripped out, roll cage welded in, no interior. Car was running great and everything was working fine. Disconnected the battery one day to install a battery box, and when I reconnected the battery the VATS system activated for some reason and I had a no crank, no start sympton. Attempted key relearn, no luck. Took the car to a dealer and did a Tech-2 Security Relearn, still no luck. Dealer determined the issue was with the Key Transponder Module on the ignition switch itself. Rather than replacing this module, I decided I would simply flash in a tune with the VATS delete and carry on. Connected my V2 and Laptop, attempted a full flash, and Paul from EFILive determined the PCM had a Flash Memory failure. Now the PCM was scrambled and wouldn't take a flash, and had lost the vehicle VIN.
Purchased a used E37 from a scrapyard. Computer was from a 2009 and had the correct OS. Connected and full flashed in my VATS delete tune. Car runs! Completed the required clutch pedal relearn and CKP CASE Relearn, all good. Disconnected from EFILive, went to take the car for a drive, and after using the throttle pedal twice I get the "Reduced Engine Power" message and lose throttle control. Read codes and find the following codes - P0036, P0532, P0054, P0606, B2555, U2113, U2129, B3031, B3055. All of these codes make total sense for the car given the Airbag Module is removed (Ran fine for months since then), Rear O2s are removed (Ran fine for months since then), and interior lights are removed. Turning off the codes makes them no longer appear, but still gives the same "Reduced Engine Power" message. I turned them back on so I could monitor what causes the problem exactly. Clearing all codes and idling the car, all codes EXCEPT P0606 return. Rev the car up twice, pedal control goes away, P0606 comes back. The only thing at this point that I can think of is that P0606 is an Internal PCM fault, and when this happens the PCM goes into limp mode and takes away pedal control. With the car shut off, the Throttle Pedal reads the correct position at all times and the throttle body follows the throttle pedal correctly throughout the range. Is there any chance there is a Throttle Pedal Relearn required when replacing a controller? Everything I read on forums and diagnostic charts for this code indicates issues between the TAC APP Sensor and PCM Reading. All the Electronic Throttle Control tables are original and unmodified from the original tune which was pulled from the car.
At this point, my next steps I believe would be to purchase another PCM, this time which will be a brand new one, and flash in the tune and see if my problem was truly PCM related. The main issue at this point is cost, as EFILive has already replaced the failed Flash Memory license once (Thank you a ton guys) and doubt they will replace it again for this "New" PCM that appears to have once again failed. Suggestions and thoughts? Buy another PCM? Anything I can test to verify the PCM has an internal fault? I'll attach the file for anyone who wants to have a look as well.
24099