What is P2121?
OBD-II code P2121 indicates a problem with the accelerator pedal position, or APP, sensor. Get your OEM Toyota sensors here. The accelerator pedal position sensor is located on the accelerator pedal bracket. This pedal position sensor has two sensor elements and two signal outputs which are VPA & VPA2.
How do you clear the codes on a Dodge Cummins?
Using a code reader tool, connect to the ECM and find the “fault codes” tab….Follow these steps to clear the Cummins fault codes with a scanner:

- Close the doors and insert the key into the ignition.
- Cycle the key five times from “off” to “run” without actually cranking the engine.
- On the fifth cycle, leave in run.
What causes code P2138?
Diagnostic trouble code (DTC) P2138 stands for “Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation.” It is triggered when the vehicle’s engine control module (ECM) or powertrain control module (PCM) detects that the signals from the two throttle position sensors (or two accelerator pedal position sensors) do …
Where is the pedal position sensor located?
The sensor is usually located on the butterfly spindle/shaft, so that it can directly monitor the position of the throttle. More advanced forms of the sensor are also used.

How do you clear the codes on a 2008 Dodge Ram?
How To Reset the Check Engine Light on a RAM 1500
- Find your battery under the hood and disconnect the black/negative cable.
- Wait 20 minutes for the power reserve to expire. The RAM 1500 check engine light should reset automatically during this time.
- Now, just reconnect the black/negative cable.
How do I fix code P2138?
What repairs can fix the P2138 code?
- Replacing the throttle body motor or throttle body assembly.
- Repairing or replacing wiring that is associated with the throttle body motor.
- Replacing the throttle position sensor.
- Repairing or replacing wiring that is associated with the throttle position sensor.
Is P2138 serious?
How Serious Is Code P2138? – Severe. This trouble code can cause the vehicle to lose throttle response. If this happens at the wrong time, it could result in a wreck.
How do you reset the check engine light on a 2008 Dodge Ram 1500?
What are RAM codes?
In general, processor instructions are placed in a segment you will call “code memory”. This may actually reside in RAM and not in Flash or ROM. For example, on a PC, your code could be loaded from the hard drive into RAM and executed in RAM.
Can you drive with P2138 code?
We recommend addressing the issue causing P2138 as soon as possible. Your car may have trouble accelerating or go into reduced power mode when this code is triggered, which lets you know it’s not the best idea to drive with P2138.