P1125 Pontiac 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 Pontiac 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.
Code P1125 Pontiac Description
• 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.
What are the Possible Causes of the DTC P1125 Pontiac?
- 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 Pontiac?
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 Pontiac 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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Frequently Asked Questions about P1125 Pontiac Code
1. What does OBDII code P1125 mean on a Pontiac?
P1125 indicates a fault in the Accelerator Pedal Position (APP) Sensor, which monitors the position of the accelerator pedal and sends data to the engine control module (ECM).
2. What are the common symptoms of the P1125 code?
Symptoms may include reduced engine power, poor acceleration, the "Reduced Engine Power" warning on the dashboard, and the Check Engine Light turning on.
3. What causes the P1125 code to appear?
Common causes include a faulty APP sensor, damaged wiring or connectors, a malfunctioning throttle body, or a problem with the ECM.
4. Can I drive my Pontiac with the P1125 code?
Driving with the P1125 code is not recommended as it may result in reduced engine performance, which could be unsafe in certain driving conditions.
5. How do you diagnose a P1125 code on a Pontiac?
Diagnosis involves using a scan tool to confirm the code, inspecting the APP sensor and its wiring for damage, and checking the throttle body for proper operation.
6. How is the P1125 code fixed?
Repairs may include replacing the APP sensor, repairing or replacing damaged wiring, cleaning or replacing the throttle body, or reprogramming the ECM.
7. How much does it cost to fix the P1125 code?
The repair cost varies but typically ranges from $150 to $400, depending on whether the issue is with the APP sensor, wiring, or throttle body.
8. Can a dirty throttle body cause the P1125 code?
Yes, a dirty or malfunctioning throttle body can cause improper readings and trigger the P1125 code.
9. Will resetting the Check Engine Light fix the P1125 code?
Resetting the light may temporarily clear the code, but the underlying issue must be resolved to prevent it from returning.
10. How can I prevent the P1125 code from recurring?
Regular maintenance, such as inspecting and cleaning the throttle body, checking wiring for damage, and addressing any issues promptly, can help prevent the code from recurring.
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