Engine-CodesSaturn – P1125 Saturn

P1125 Saturn Code - Accelerator Pedal Position Sensor Fault

Quick Answer

The P1125 diagnostic trouble code (DTC) for Saturn vehicles indicates a fault with the accelerator pedal position sensor. Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems. 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 Saturn indicates Accelerator Pedal Position Sensor Fault.
Common causes
Common causes include Faulty accelerator pedal position sensor, Wiring or connector issues in the sensor circuit, ECM software or hardware problems.
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.
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code P1125 Saturn Description

The P1125 diagnostic trouble code (DTC) for Saturn vehicles indicates a fault with the accelerator pedal position sensor. The accelerator pedal position sensor is a vital component of the electronic throttle control system, which is responsible for controlling the throttle opening in response to the driver's input. This sensor provides feedback to the engine control module (ECM) regarding the position of the accelerator pedal, allowing the ECM to adjust the throttle opening and fuel delivery accordingly.

OBDII Code P1125 Saturn - Accelerator Pedal Position Sensor Fault
P1125 Saturn Code - Accelerator Pedal Position Sensor Fault

Common Causes of P1125 Saturn

  1. Faulty accelerator pedal position sensor
  2. Wiring or connector issues in the sensor circuit
  3. ECM software or hardware problems
  4. Environmental factors such as moisture or corrosion affecting the sensor
  5. Mechanical damage to the sensor due to wear and tear

Symptoms of P1125 Saturn

  1. Erratic throttle response
  2. Engine stalling or hesitation
  3. Rough idling
  4. Decreased fuel efficiency
  5. Limited engine power

How to Fix P1125 Saturn

  1. Diagnose the issue using a scan tool to confirm the P1125 code and test the accelerator pedal position sensor.
  2. Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
  3. Replace the accelerator pedal position sensor if it is found to be faulty.
  4. Clear the DTC and perform a sensor relearn procedure to recalibrate the new sensor.
  5. Test drive the vehicle to ensure the issue has been resolved and the symptoms have been eliminated.

Cost to Fix P1125 Saturn

The cost of repairing a P1125 accelerator pedal position sensor fault can vary depending on the make and model of the vehicle, the labor rates in your area, and whether you choose to have the repair done at a dealership, independent mechanic, or DIY. Typically, the cost of replacing an accelerator pedal position sensor ranges from $100 to $300, with additional costs for diagnostic time and labor. Total repair costs could range from $200 to $500, but it's advisable to obtain a specific estimate from a qualified mechanic before proceeding with the repair.

When is the Code Detected?

The Powertrain Control Module (PCM) detects that the difference between Accelerator Pedal Position (APP) sensor 1 and APP sensor 2 is more than the predicted value.

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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.

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