OBD-II Code P0124 is defined as a Throttle/Pedal Position Sensor/Switch “A” Circuit Intermittent. This code indicates that the vehicle’s engine control module (PCM) has detected an intermittent issue with the throttle or pedal position sensor circuit.
What Does the P0124 Code Mean?
The P0124 code signifies that there is an inconsistent signal being received from the Throttle Position Sensor or the Pedal Position Sensor. These sensors are crucial for relaying input regarding the driver’s acceleration demands to the PCM, allowing it to manage engine performance efficiently.
What Causes the P0124 Code?
Several factors can trigger the P0124 code, including:
- Defective Throttle or Pedal Position Sensor or Switch
- Dirty, carbon-filled Throttle Bore
- Torn or jammed floor mats obstructing the pedals
- Faulty or corroded wiring or connections associated with the Throttle/Pedal Position Sensors
What Are the Symptoms of the P0124 Code?
Common symptoms associated with the P0124 code include:
- Illumination of the Check Engine Light
- No noticeable symptoms in many cases
- Engine may have difficulty starting or may not start at all
- Engine hesitation during acceleration
How Serious Is the P0124 Code?
The P0124 code is considered urgent, as it can lead to limited vehicle speed (often down to 20 mph or less) due to the PCM entering “Limp Home Mode” to protect the engine and ensure driver safety. Immediate attention is advised to prevent further damage or safety hazards.
How to Diagnose the P0124 Code
To diagnose the P0124 code, follow these steps:
- Record freeze frame data and conditions under which the code was set.
- Perform a test drive while monitoring engine load, RPM, and speed with a scan tool.
- Compare the Throttle/Pedal Position Sensor PID values to the voltage readings.
- Inspect the Throttle/Pedal Position Sensor connector for a steady 5-volt reference and a good ground.
- Test the output signal from the Throttle/Pedal Position Sensor to check for any flat spots or glitches.
Common Repairs for the P0124 Code
Repairs for the P0124 code may include:
- Replacing the Throttle or Pedal Position Sensor
- Cleaning the Throttle Body to remove carbon buildup
- Repairing or replacing faulty wiring and connections
- Addressing any physical obstructions like torn floor mats
How Much Does It Cost to Fix the P0124 Code?
The cost to repair the P0124 code varies widely based on the specific issue. Sensor replacements can range from $100 to $300, while more complex electrical repairs could exceed $500, depending on labor rates and parts needed.
Can I Fix the P0124 Code Myself?
While some repairs can be performed by a skilled DIYer, such as cleaning the throttle body or replacing a sensor, it is crucial to have a thorough understanding of automotive systems and diagnostics. If unsure, consulting a professional mechanic is recommended to avoid misdiagnosis and unnecessary repairs.
