What Is the P1125 Code?
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The diagnostic error code, P1125, is a manufacturer-specific trouble code that indicates an issue with the throttle position sensor. This code applies to the following vehicles, but may have a different meaning for others:
- Citroen
- Ford
- Peugeot
- Land Rover
If your car activates the P1125 ODB code, it is an indication that there is an issue with the sensors that allow communication between the accelerator pedal and throttle. This system includes two accelerator pedal position (APP) sensors and a sensor inside or on the throttle body of the engine.
When this diagnostic code activates, it is a sign that the throttle position sensor is functioning intermittently as a result of mechanical or electronic faults. When the throttle position sensor is functioning intermittently, it cannot communicate properly with the accelerator pedal, and this has serious implications for the drivability and safety of a vehicle.
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What Are the Symptoms of a P1125 Code?
If there are intermittent functionality or electrical issues within your car’s throttle position sensor that causes a P1125 code to activate, the first symptom will be the illumination of your car’s check engine light. Other symptoms include:
- Jerky acceleration
- Rough idling
- Rough or hesitant gear shifting
- Idle sourcing
- Poor or low power acceleration
- Engine stalling
- Failure to start
What Are Some Causes of a P1125 Code?
Problems within the throttle position sensor and the activation of the P1125 code can be caused by a few electrical and mechanical issues including, but not limited to
- Damaged or shorted circuit
- Damaged or loose connectors
- Damaged or loose wiring
- Damaged or faulty mass air flow sensors
- Excessive wear and tear
- Faults or damage in the powertrain control module (PCM)
- Sensor harness open or shorted
How Serious Is the P1125 Code?
Damage, faults, or intermittent voltage to your car’s throttle position sensor is a serious issue that will impact the safety and drivability of your car over time. The most common issues you will face when this code is active are loss of acceleration power, intermittent acceleration capabilities, and unexpected stalling. If the issue progresses, however, you may also find that your car fails to start or becomes entirely undrivable.
Can I Still Drive with a P1125 Code?
It may be possible to drive a car that has activated a P1125 code as a result of throttle position sensor issues, but as the issue escalates you will find it increasingly difficult to do so safely. As well as causing problems with acceleration, you may also find that your fuel consumption increases and that your car stalls at higher speeds. This can cause safety issues for you and other road users. For this reason, it is recommended that you do not drive a car displaying this code long distances and that you seek prompt diagnosis and repair.
How Easy Is It to Diagnose a P1125 Code?
Diagnosing the underlying cause of a P1125 code is straightforward for professionals with the proper diagnostic tools. To correctly identify all underlying causes, your mechanic will check the technical service bulletins (TSB), check both the throttle position sensor and APP sensor for signs of damage in the wiring, connectors, circuitry, and harnesses, and, of course, check the sensors themselves. This process of elimination will identify all contributing factors.
How Difficult Is It to Inspect a P1125 Code?
Inspecting and repairing the issues associated with a P1125 code is straightforward with the right tools. The throttle position sensor is located on the throttle valve spindle, making it fairly easy to access. The most common repairs include replacing damaged or corroded wiring and connectors, followed by the replacement of the sensor itself. While these sensors are durable and designed to be long-lasting, wear and tear on older vehicles or as a result of consistently high mileage can degrade their condition over time.
Need Additional Help with Your P1125 Code?
If the check engine light is illuminated in your car and activates the P1125 error code, it is best to act promptly. A professional auto repair specialist offers the best chance of effective and long-lasting repairs. If you need to find reputable service centers in your area, the Kelley Blue Book (KBB) service center locator is a free online resource that can compile a list of mechanics in your area.
If you want to know more about diagnostic error codes that your car has or is displaying, KBB also has a free online ODB-II database that contains information about all of the currently used diagnostic error codes. This database explains the meanings, symptoms, and common causes of each code.
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