AutoCodes – Dodge – P2122 Dodge

P2122 Dodge Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

Quick Answer

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Faulty Throttle Body Assembly, Accelerator Pedal Position Sensor harness is open or shorted. 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 Dodge indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit Low.
Common causes: Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Faulty Throttle Body Assembly, Accelerator Pedal Position Sensor harness is open or shorted.
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 37,231

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 11, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2122 Dodge Description

The Accelerator Pedal Position (APP) sensor is an input to the Powertrain Control Module (PCM) and used to determine the amount of torque requested by the operator. There are 2 pedal position signals in the sensor. Both signals, APP and APP2, have a positive slope (increasing angle, increasing voltage), but are offset and increase at different rates. The 2 pedal position signals make sure the PCM receives a correct input even if 1 signal has a concern. The PCM determines if a signal is incorrect by calculating where it should be, inferred from the other signals. If a concern is present with one of the circuits the other input is used. There are 2 reference voltage circuits, 2 signal return circuits, and 2 signal circuits (a total of 6 circuits and pins) between the PCM and the APP sensor assembly. The pedal position signal is converted to pedal travel degrees (rotary angle) by the PCM. The software converts these degrees to counts, which is the input to the torque based strategy.

OBDII Code P2122 Dodge - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low - AutoCodes.com — P2122 Dodge Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2122 Dodge?

Faulty Accelerator Pedal Position (APP) Sensor
Faulty Throttle Body Assembly
Accelerator Pedal Position Sensor harness is open or shorted
Accelerator Pedal Position Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P2122 Dodge?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2122 Dodge 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 Dodge Code

1. What are common symptoms of OBDII code P2122 in a Dodge vehicle?

- Common symptoms include reduced engine power, hesitation or stalling when accelerating, and the vehicle going into "limp mode."

2. What causes the OBDII code P2122 in a Dodge related to the Throttle/Pedal Position Sensor/Switch 'D' Circuit Low?

- The code is typically triggered by a malfunction in the throttle position sensor or its circuit, such as a faulty sensor, damaged wiring, or poor electrical connections.

3. How can I diagnose the issue causing OBDII code P2122 in my Dodge?

- Diagnosing the problem involves checking the throttle position sensor's wiring and connectors for damage, testing the sensor's voltage output, and using a scan tool to monitor sensor data.

4. Can driving with OBDII code P2122 in a Dodge cause further damage to the vehicle?

- Continuing to drive with this code may lead to poor engine performance, decreased fuel efficiency, and potential damage to other engine components over time.

5. Is it safe to continue driving my Dodge with OBDII code P2122 present?

- It is not recommended to drive the vehicle with this code as it can affect the vehicle's drivability and safety. It's best to address the issue promptly.

6. How can I repair OBDII code P2122 in my Dodge related to the Throttle/Pedal Position Sensor/Switch 'D' Circuit Low?

- Repair options include replacing the throttle position sensor, repairing damaged wiring or connectors, and ensuring proper sensor calibration.

7. Are there any DIY fixes for OBDII code P2122 in a Dodge?

- DIY fixes may include checking and cleaning the throttle position sensor, inspecting the wiring for visible damage, and resetting the trouble code to see if it reoccurs.

8. How much does it typically cost to fix OBDII code P2122 in a Dodge at a repair shop?

- The cost of repairs can vary depending on the extent of the issue and the labor rates of the repair shop, but it may range from $100 to $300 or more.

9. Will resetting the OBDII code P2122 in my Dodge make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue causing the code is not addressed, it is likely to reappear.

10. Can a faulty throttle position sensor cause other OBDII codes to appear in a Dodge?

- Yes, a malfunctioning throttle position sensor can trigger related codes such as P2123, P2121, or other codes related to the throttle position sensor circuit.