AutoCodesCadillac – P2122 Cadillac

P2122 Cadillac Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage

Quick Answer

The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P2122 Cadillac indicates Accelerator Pedal Position Sensor 1 Circuit Low Voltage.
Common causes
Common causes include Faulty Accelerator Pedal Position Sensor, Accelerator Pedal Position Sensor harness is open or shorted, Accelerator Pedal Position Sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code Popularity 10,694
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Sep 08, 2022
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Code P2122 Cadillac Description

The Accelerator Pedal Assembly contains 2 Accelerator Pedal Position (APP) sensors. The APP sensors are mounted to the accelerator pedal assembly and are not serviceable. The APP sensors provide a signal voltage that changes relative to the pedal position. The Engine Control Module (ECM) supplies each APP sensor with a 5 V reference circuit, a low reference circuit, and a signal circuit.
Both the APP sensors 1 and 2 signal percentages increase as the pedal is depressed, from approximately 0 percent at rest to above 95 percent when fully depressed.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the APP sensor 1 voltage is less than 0.46 V for less than 1 s.
OBDII Code P2122 Cadillac - Accelerator Pedal Position Sensor 1 Circuit Low Voltage - AutoCodes.com
P2122 Cadillac Code - Accelerator Pedal Position Sensor 1 Circuit Low Voltage

What are the Possible Causes of the DTC P2122 Cadillac?

  • Faulty Accelerator Pedal Position Sensor
  • Accelerator Pedal Position Sensor harness is open or shorted
  • Accelerator Pedal Position Sensor circuit poor electrical connection
  • Faulty Engine Control Module (ECM)

How to Fix the DTC P2122 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2122 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2122 Cadillac Code

No Frequently Asked Questions about P2122 Cadillac Code found.

Discuss the causes and fixes for P2122 Cadillac OBDII Code

  • help im a poor redneck that has never had a nice car like this i thought i was getting a break in life but i cant figure out how to resolve this problem i changed the pedel and it is still througing this code whats next

  • What model and year is your vehicle?

  • Hi I'm Puch the accelerator the Cadillac no running

  • What model and year is your vehicle? You could have a problem with the throttle body.

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