Check engine code P2122 accelerator pedal position sensor

Tiny
GAITHER TUCKER
  • MEMBER
  • 2003 DODGE RAM
  • 5.9L
  • 6 CYL
  • 4WD
  • MANUAL
  • 150,000 MILES
Code said the voltage is low at APP sensor. What pin does the five volts appear on the sensor and where does it originate?
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Friday, March 9th, 2018 AT 4:31 PM

5 Replies

Tiny
ASEMASTER6371
  • MECHANIC
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Good morning.

Check the orange wire at the throttle position sensor at the throttle body for 5 volts. Check at the pedal sensor for the same.
The voltages originates at the pcm.

Roy

P2122
Descriptor
Accelerator Pedal Position Sensor # 1 Low
Low Voltage At The App Sensor
Probable Causes
5 Volt Supply Circuit Open
5 Volt Supply Circuit Shorted to Ground
Accelerator Pedal Position (APP) Sensor
Accelerator Pedal Position Sensor (APPS)
Accelerator Pedal Position Sensor (APPS) 1 Signal Circuit Shorted to Ground or Return
Accelerator Pedal Position Sensor (APPS) 1 Supply Circuit Shorted to Ground or Return
Accelerator Pedal Position Sensor (APPS) No. 1 Signal Circuit Open
Accelerator Pedal Position Sensor (APPS) No. 1 Signal Circuit Shorted to Ground
Accelerator Pedal Position Sensor (APPS) No. 1 Signal Circuit Shorted to Sensor Return Circuit
Accelerator Pedal Position Sensor (APPS) No. 1 Sweep
Engine Control Module (ECM)
Intermittent Condition
Open Accelerator Pedal Position Sensor (APPS) 1 Signal Circuit
Open Accelerator Pedal Position Sensor (APPS) 1 Supply Circuit
Open Circuit On the Ratiometric Wire
Open Circuit On the Supply Wire
Powertrain Control Module (PCM)
Ratiometric Circuit Shorted to Accelerator Pedal Position Sensor (APPS) Return, Battery Negative, or Sensor 1 Return
Ratiometric Circuit Shorted to Hot Idle Switch Circuit
Ratiometric Circuit Shorted to Idle Switch Circuit
Supply Circuit Shorted to Accelerator Pedal Position Sensor (APPS) Return, Battery Negative, or Sensor 1 Return
Wiring Harness or Connectors
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Saturday, March 10th, 2018 AT 5:55 AM
Tiny
PATENTED_REPAIR_PRO
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App wiring.
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Saturday, March 10th, 2018 AT 8:13 AM
Tiny
GAITHER TUCKER
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  • 10 POSTS
Thanks so much for your help. Found shorted five volt supply and fixed the problem.
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Wednesday, March 14th, 2018 AT 1:00 PM
Tiny
GAITHER TUCKER
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Thanks again.
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Wednesday, March 14th, 2018 AT 1:02 PM
Tiny
ASEMASTER6371
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You are welcome, good find.

Roy
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Wednesday, March 14th, 2018 AT 1:07 PM

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