AutoCodes – Jeep – P2122 Jeep

P2122 Jeep 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 Jeep 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 557

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

What does this mean?

What are the Possible Causes of the DTC P2122 Jeep?

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 Jeep?

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 Jeep 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 Jeep Code

What does the OBDII code P2122 mean for a Jeep?

P2122 indicates a low voltage issue in the Throttle/Pedal Position Sensor/Switch 'D' circuit, which helps monitor the throttle position.

What are the common symptoms of code P2122 in a Jeep?

Symptoms may include reduced engine power, the throttle not responding properly, the vehicle entering "limp mode," and an illuminated check engine light.

What causes the P2122 code to appear in a Jeep?

Common causes include a faulty throttle position sensor, damaged or corroded wiring, a poor electrical connection, or a malfunctioning accelerator pedal position sensor.

Can I drive my Jeep with the P2122 code?

While the vehicle may still be drivable, it could experience reduced power and throttle response, making it unsafe to drive for extended periods or in heavy traffic.

How do I diagnose the P2122 code in my Jeep?

Diagnosis involves using an OBDII scanner to confirm the code, inspecting wiring and connectors for damage or corrosion, and testing the throttle position sensor and related circuits for proper voltage.

How do I fix the P2122 code on a Jeep?

Repairs may include replacing the throttle position sensor, repairing damaged wiring or connectors, cleaning corroded connections, or replacing the accelerator pedal position sensor.

Is the P2122 code related to the throttle body?

Yes, the P2122 code can be related to the throttle body, as it is part of the system that the throttle position sensor monitors.

What tools do I need to fix the P2122 code on a Jeep?

You may need an OBDII scanner, a multimeter to check voltage, and basic tools for accessing and replacing sensors or repairing wiring.

How much does it cost to repair the P2122 code on a Jeep?

Repair costs vary depending on the issue but typically range from $100 to $300 for parts and labor, with a throttle position sensor replacement often costing around $150 to $200.

Can a dirty throttle body cause the P2122 code?

While not a direct cause, a dirty throttle body may contribute to throttle response issues, so cleaning it can sometimes help resolve related problems.