P1225 Infiniti Code - Closed Throttle Position Learning Performance Problem
Quick Answer
The P1225 code in an Infiniti vehicle indicates a Closed Throttle Position Learning Performance Problem. Common causes include Faulty throttle position sensor: A malfunctioning throttle position sensor can prevent the ECM from accurately learning the closed throttle position, Vacuum leak: A vacuum leak in the intake system can disrupt the air flow and affect the closed throttle position learning process, Dirty throttle body: A buildup of carbon deposits and dirt on the throttle body can hinder the proper operation of the throttle plate, affecting the closed throttle position. 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
- P1225 Infiniti indicates Closed Throttle Position Learning Performance Problem.
- Common causes
- Common causes include Faulty throttle position sensor: A malfunctioning throttle position sensor can prevent the ECM from accurately learning the closed throttle position, Vacuum leak: A vacuum leak in the intake system can disrupt the air flow and affect the closed throttle position learning process, Dirty throttle body: A buildup of carbon deposits and dirt on the throttle body can hinder the proper operation of the throttle plate, affecting the closed throttle position.
- 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 P1225 Infiniti Description
The P1225 code in an Infiniti vehicle indicates a Closed Throttle Position Learning Performance Problem. This means that the Engine Control Module (ECM) is unable to properly learn the closed throttle position, which can lead to various issues with the vehicle's performance. The closed throttle position is crucial for the ECM to accurately control the air-fuel mixture and idle speed of the engine. When the ECM is unable to learn this position correctly, it can result in poor engine performance, rough idling, stalling, and decreased fuel efficiency.
Common Causes of P1225 Infiniti
- Faulty throttle position sensor: A malfunctioning throttle position sensor can prevent the ECM from accurately learning the closed throttle position.
- Vacuum leak: A vacuum leak in the intake system can disrupt the air flow and affect the closed throttle position learning process.
- Dirty throttle body: A buildup of carbon deposits and dirt on the throttle body can hinder the proper operation of the throttle plate, affecting the closed throttle position.
- Malfunctioning ECM: A faulty ECM can lead to communication errors and prevent the closed throttle position learning process from functioning correctly.
Symptoms of P1225 Infiniti
- Rough idling: The engine may idle roughly or inconsistently, causing vibrations and shaking in the vehicle.
- Stalling: The engine may stall unexpectedly, especially when coming to a stop or at low speeds.
- Decreased fuel efficiency: The vehicle may experience a decrease in fuel economy due to improper air-fuel mixture control.
- Lack of acceleration: The vehicle may struggle to accelerate smoothly, especially when starting from a stop or during overtaking maneuvers.
How to Fix P1225 Infiniti
- Inspect and clean the throttle body: Remove the throttle body and clean it thoroughly to remove any dirt or carbon deposits that may be affecting the closed throttle position.
- Check and replace the throttle position sensor: Test the throttle position sensor for proper operation and replace it if necessary to ensure accurate closed throttle position readings.
- Repair any vacuum leaks: Inspect the intake system for any vacuum leaks and repair or replace any damaged hoses or gaskets.
- Reset the ECM: Clear the trouble code from the ECM and perform a throttle position learning procedure to recalibrate the closed throttle position.
- Test drive the vehicle: After completing the repairs, test drive the vehicle to ensure that the issue has been resolved and that the closed throttle position is functioning correctly.
Cost to Fix P1225 Infiniti
The typical repair costs for addressing a P1225 code in an Infiniti vehicle can range from $200 to $500, depending on the specific cause of the issue and the labor rates at the auto repair shop. Parts such as a new throttle position sensor or throttle body cleaning supplies may also be required, adding to the overall cost. It's important to note that diagnosis time and labor rates can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to consult with a certified mechanic for a more accurate estimate based on your specific circumstances.
When is the Code Detected?
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Information for Specific Infiniti Models
- P1225 2003 Infiniti G35 — Closed Throttle Position Learning Performance Problem
- P1225 2004 Infiniti G35 — Closed Throttle Position Learning Performance Problem
- P1225 2005 Infiniti G35 — Closed Throttle Position Learning Performance Problem
- P1225 2006 Infiniti G35 — Closed Throttle Position Learning Performance Problem
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