AutoCodes – Generic – P2127

P2127 Code - Throttle/Pedal Position Sensor/Switch 'E' 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, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) 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: P2127 indicates Throttle/Pedal Position Sensor/Switch 'E' Circuit Low.
Common causes: Common causes include Faulty Accelerator Pedal Position (APP) Sensor, Accelerator Pedal Position (APP) Sensor harness is open or shorted, Accelerator Pedal Position (APP) 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 69,540

How popular is this code, among other codes? Medium

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 Sep 08, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P2127 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. The accelerator pedal position (APP) sensor 2 is out of self-test range low.

OBDII Code P2127 - Throttle/Pedal Position Sensor/Switch 'E' Circuit Low - AutoCodes.com — P2127 Code - Throttle/Pedal Position Sensor/Switch 'E' Circuit Low

What does this mean?

What are the Possible Causes of the DTC P2127?

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

How to Fix the DTC P2127?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2127 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.

Need more information about the P2127 code?

Need more information on how to fix the P2127 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2127 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P2127 Acura — Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 BMW — Throttle/Pedal Positio Sensor/Switch 'E' Circuit Low
P2127 Buick — Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 Cadillac — Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 Chevrolet — Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 Chrysler — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 Dodge — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 Ford — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 GMC — Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 Honda — Accelerator Pedal Position Sensor 2 Circuit Low Voltage
P2127 Hyundai — Accelerator Position Circuit - Low Input
P2127 Infiniti — Accelerator Pedal Position Sensor Circuit
P2127 Jeep — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 KIA — Accelerator Position Circuit - Low Input
P2127 Lexus — Throttle Pedal Position Sensor/Switch 'E' Circuit Input Low
P2127 Lincoln — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 Mercedes-Benz — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 Mercury — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 MINI — Throttle/Pedal Positio Sensor/Switch 'E' Circuit Low
P2127 Nissan — Accelerator Pedal Position Sensor Circuit
P2127 RAM — Throttle/Pedal Position Sensor/Switch 'E' Circuit Low
P2127 Scion — Throttle Pedal Position Sensor/Switch 'E' Circuit Input Low
P2127 Toyota — Throttle Pedal Position Sensor/Switch 'E' Circuit Input Low

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 P2127 Code

1. What are the common symptoms of OBDII code P2127 (Throttle/Pedal Position Sensor/Switch 'E' Circuit Low)?

- Common symptoms include reduced engine power, poor acceleration, erratic throttle response, and in some cases, the vehicle going into limp mode.

2. What are the possible causes of OBDII code P2127?

- The code P2127 can be caused by a faulty throttle position sensor, wiring issues in the throttle position sensor circuit, a defective accelerator pedal position sensor, or a problem with the electronic throttle control system.

3. How can I diagnose the cause of OBDII code P2127?

- Diagnosing the cause of P2127 typically involves checking the throttle position sensor and accelerator pedal position sensor using a multimeter, inspecting the wiring for any damage or loose connections, and scanning the vehicle's computer for any related trouble codes.

4. Can a dirty throttle body cause OBDII code P2127?

- While a dirty throttle body can affect the performance of the throttle system, it is unlikely to directly cause code P2127. However, it is good practice to clean the throttle body as part of routine maintenance.

5. What are some repair tips for fixing OBDII code P2127?

- Repair tips for code P2127 include checking and replacing the throttle position sensor or accelerator pedal position sensor if faulty, repairing any damaged wiring, clearing the trouble code, and performing a throttle body relearn procedure if necessary.

6. Is it safe to continue driving with OBDII code P2127 present?

- It is not recommended to drive with OBDII code P2127 present, as it can lead to further damage to the engine or drivetrain components. It is best to address the issue promptly to avoid potential safety hazards.

7. Can I reset OBDII code P2127 without fixing the underlying issue?

- While you can clear the trouble code using an OBDII scanner, it is important to address the root cause of the code to prevent it from recurring. Ignoring the underlying issue can lead to ongoing drivability problems.

8. How much does it typically cost to repair OBDII code P2127?

- The cost of repairing OBDII code P2127 can vary depending on the cause of the issue, the need for replacement parts, and labor costs. It is advisable to consult a mechanic for an accurate estimate based on your specific vehicle.

9. Will OBDII code P2127 cause a vehicle to fail an emissions test?

- Yes, OBDII code P2127 can cause a vehicle to fail an emissions test, as it indicates a problem with the throttle or pedal position sensors, which are essential for proper engine performance and emissions control.

10. How long does it typically take to repair OBDII code P2127?

- The repair time for OBDII code P2127 can vary depending on the complexity of the issue and the availability of parts. In some cases, the repair can be completed within a few hours, while more involved repairs may take longer.