Code p2127 and p2138

Question edited for clarity.
Question moved to model category.

Yyou can't diagnose issues like this yourself. You need more that a $125 scan tool. You need an auto electrician with a $5,000 bi-directional scan tool computer and the experience to use it. This is all electronics and computer networks and can't be guessed.

P2127 Dodge The P2127 code means that the throttle or pedal position sensor switch E has a low input. The pedal position sensor is a sensor found on the gas pedal. The sensor tells the ECU when the gas pedal is depressed and how far it is depressed.

P2127 OBD-II Trouble Code: Throttle/Pedal Position Sensor ...

DTC P2127: Accelerator Pedal Position (APP) Sensor 2 Circuit Low Voltage

This is right out of factory service repair manual , don't google stuff may not be accurate.
If you look under the steering wheel at the gas pedal you will see connectors at the Accelerator Pedal . position sensors inside gas pedal .

Circuit/System Description
The throttle actuator control (TAC) system uses two accelerator pedal position (APP) sensors to monitor the accelerator pedal position. The APP sensors 1 and 2 are located within the pedal assembly. Each sensor has a 5-volt reference circuit, a low reference circuit, and a signal circuit.
Two processors are also used to monitor the TAC system data. Both processors are located within the engine control module (ECM). Each signal circuit provides both processors with a signal voltage proportional to pedal movement. The processors share and monitor data to verify that the indicated APP calculation is correct.

It's not see wide open throttle like other guy says .

P2127
The ECM detects that APP sensor 2 voltage is less than 0.16 volt for greater than 0.5 second.


Action Taken When the DTC Sets
• DTCs P2120, P2122, P2123, P2125, P2127, P2128, and P2138 are Type A DTCs.
• The ECM commands the TAC system to operate in Reduced Engine Power mode.


Anytime the vehicle goes into reduced engine power mode A/C shuts off - cruise control won't work etc..

Just change the gas pedal assembly .

code p2127 refers to accelerator pedal position sensor/switch E --low input==causes wiring short to ground-- APP sensor/switch--TP switch short to ground--TP sensor/ switch
the engine light may be from a traction control problem because of the road conditions

replace the throttle position sensor.

Throttle/pedal position sensor recieving/sending out of range , i'd change the tps

The pedal position sensor is throwing a code. could be ECM may need to updated

google the trouble codes. lots of help there

need to diagnose the BCM for codes ,too. the car with a lock signal indicates a security system fault. that would explain the dying after 3 seconds because the ecm has turned the fuel injectors off.

try this link
http://www.the12volt.com/installbay/stereodetail/586.html

the p2127 code is an Accelerator position sensor (low input) as is the p(2138) could be moisture or debris in harness plugs. Try using dielectric grease.