Accelerator Pedal Position Sensor 2 Circuit Low
P2127 may indicate an issue in your APPS (Accelerator Pedal Position Sensor) or wiring harness between the pedal and ECM.
However…
The P2127 code is most common after an auto to manual transmission swap in Model Year 03-04.5 Dodge Ram 5.9 Cummins trucks. This is due to continuing to use the Automatic transmission style APPS instead of either:
- Swapping over to the stock manual transmission APPS for your model year truck
-Or - Upgrading to the 05-06 style on-pedal APPS as part of your swap (Recommended Solution):
5.9 Cummins Manual Swap: ECM and Throttle Range Issues – P2127
To purchase a 05-06 APPS Conversion Harness Click here:
Throttle Conversion Harness for 03-04.5 Manual Swaps: Fix P2127 Code