2012 Chevy Express P2128 Reduced Engine Power diagnose.

[@Mena124]

I keep getting p2135, on my Chevy express. The dealer fixed it once but then it came back. They had replaced the male connector and a new throttle body. But it comes back. Do you have any recommendations?

[@MobileAutoDiagnostics]

Thanks for watching my video! I'm sorry you're having this issue. So the P2135 is similar to the P2128 in the essence that you are getting a correlation code with the Throttle Position Sensors (2 sensors in the one throttle body just like the pedal in my video.) If all your wires are good from your ECM to the Throttle body, then it needs an ECM just like the one in the video and depending on the year, it has to be New. After a certain year, GM stopped allowing used modules to be programmed

[@Mena124]

@@MobileAutoDiagnostics thanks for taking the time out to reply. I really appreciate it. I have an appointment to bring it to someone this week coming up. I’m hoping it’s a wiring issue and. It an ECM swap. Have you ever boight ecm’s from flagship one? I get a lot of mixed reviews from people purchasing ECM’s there.

[@MobileAutoDiagnostics]

@Mena124 I personally don't do the purchasing but I have programmed some from Flagship 1. They are supposedly remanufactured which in essence should work, but it could come back with a different problem than you had to begin with. If you can't get a new one, Flagship would be your best bet

[@Mena124]

@@MobileAutoDiagnostics thanks, I’ll let you know how it goes. Enjoy the rest of your weekend.

[@MobileAutoDiagnostics]

@@Mena124 you too! I hope you figure out what's going on with your express!

[@philh9238]

Isnt the signals opposite? One starts high one starts low?

[@MobileAutoDiagnostics]

According to GM Service Information, it shows both should be the same, at least unplugged and for this vehicle. I have seen opposites on other vehicles though.

[@MobileAutoDiagnostics]

I appreciate the question though! "Verify the scan tool APP sensor 1 and APP sensor 2 voltage parameters are less than 0.3V. If not, disconnect ECM and retest. If now less than 0.3V, replace ECM."