AutoCodes – Buick – P1125 Buick

P1125 Buick Code - Accelerator Pedal Position Sensor Fault

Quick Answer

The Accelerator Pedal Position (APP) sensor 1 and the APP sensor 2 are potentiometer type sensors, each with the following circuits: • A 5-volt reference circuit • A low reference circuit • A signal circuit The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. 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: P1125 Buick indicates Accelerator Pedal Position Sensor Fault.
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 25,548

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 Apr 26, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1125 Buick Description

The Accelerator Pedal Position (APP) sensor 1 and the APP sensor 2 are potentiometer type sensors, each with the following circuits:
• A 5-volt reference circuit
• A low reference circuit
• A signal circuit
The control module provides the APP sensors with a 5-volt reference circuit and a low reference circuit. The APP sensors then provide the control module signal voltages proportional to pedal movement. The APP sensor 1 signal voltage is low at rest and increases as the pedal is depressed.
The APP sensor 2 signal voltage is low at rest and increases as the pedal is depressed. When the control module detects that the APP sensor 1 and the APP sensor 2 signal circuits are out of correlation with each other, DTC P1125 sets.

OBDII Code P1125 Buick - Accelerator Pedal Position Sensor Fault - AutoCodes.com — P1125 Buick Code - Accelerator Pedal Position Sensor Fault

What does this mean?

What are the Possible Causes of the DTC P1125 Buick?

Faulty Accelerator Pedal Position Sensor
Accelerator Pedal Position Sensor harness is open or shorted
Accelerator Pedal Position Sensor circuit poor electrical connection

How to Fix the DTC P1125 Buick?

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 P1125 Buick 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 P1125 Buick Code

1. What are the common symptoms of OBDII code P1125 in a Buick related to the accelerator pedal position sensor fault?

- Common symptoms include issues with acceleration, stalling, rough idling, and a decrease in overall vehicle performance.

2. What are the possible causes of OBDII code P1125 in a Buick indicating an accelerator pedal position sensor fault?

- The code can be triggered by a faulty accelerator pedal position sensor, wiring issues, or a problem with the electronic control module.

3. How can I diagnose the OBDII code P1125 in my Buick related to the accelerator pedal position sensor fault?

- A diagnostic scan tool can help identify the specific issue by reading the code and providing data on the accelerator pedal position sensor's performance.

4. Can a faulty accelerator pedal position sensor be repaired, or does it need to be replaced when triggering OBDII code P1125 in a Buick?

- In most cases, a faulty accelerator pedal position sensor will need to be replaced to resolve the issue triggering the P1125 code.

5. Are there any simple troubleshooting steps I can take before replacing the accelerator pedal position sensor for OBDII code P1125 in my Buick?

- It's recommended to check the wiring connections to the sensor and ensure they are secure and free of damage before considering sensor replacement.

6. How critical is it to address OBDII code P1125 in a Buick related to the accelerator pedal position sensor fault promptly?

- It is important to address the issue promptly as driving with a faulty accelerator pedal position sensor can lead to unsafe driving conditions and potential further damage to the vehicle.

7. Can resetting the OBDII code P1125 in a Buick resolve the accelerator pedal position sensor fault temporarily?

- Resetting the code may temporarily clear the warning light, but the underlying issue with the accelerator pedal position sensor will likely persist and trigger the code again.

8. Is it safe to continue driving my Buick with the OBDII code P1125 related to the accelerator pedal position sensor fault illuminated?

- It is not recommended to continue driving the vehicle with the warning light on, as it indicates a potential issue that can affect the vehicle's performance and safety.

9. Will a mechanic be able to provide a more accurate diagnosis of the OBDII code P1125 in my Buick than a DIY scan tool?

- A mechanic will have the expertise to perform a more in-depth diagnosis, including testing the sensor's functionality and identifying any other related issues that may be causing the fault.

10. How much can I expect to pay for parts and labor to repair the accelerator pedal position sensor fault triggering OBDII code P1125 in my Buick?

- The cost of parts and labor for replacing the accelerator pedal position sensor can vary depending on the vehicle model, labor rates, and any additional components that may need attention, but it typically ranges from $150 to $400.