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P1226 2005 Nissan Maxima Code - Closed Throttle Position Learning Performance Problem

Quick Answer

The P1226 code on a 2005 Nissan Maxima indicates a problem with the Closed Throttle Position Learning performance. Common causes include Faulty throttle position sensor (TPS) or wiring, Dirty or clogged throttle body, Vacuum leaks in the intake system. 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
P1226 2005 Nissan Maxima indicates Closed Throttle Position Learning Performance Problem.
Common causes
Common causes include Faulty throttle position sensor (TPS) or wiring, Dirty or clogged throttle body, Vacuum leaks in the intake system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 11, 2024
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Code P1226 2005 Nissan Maxima Description

The P1226 code on a 2005 Nissan Maxima indicates a problem with the Closed Throttle Position Learning performance. This means that the Engine Control Module (ECM) is unable to learn the correct position of the throttle when it is fully closed. This can lead to issues with engine performance, fuel efficiency, and overall drivability of the vehicle. The throttle position sensor (TPS) plays a crucial role in providing this information to the ECM, so any malfunction in this system can trigger the P1226 code.

OBDII Code P1226 2005 Nissan Maxima - Closed Throttle Position Learning Performance Problem
P1226 2005 Nissan Maxima Code - Closed Throttle Position Learning Performance Problem

Common Causes of P1226 2005 Nissan Maxima

  1. Faulty throttle position sensor (TPS) or wiring.
  2. Dirty or clogged throttle body.
  3. Vacuum leaks in the intake system.
  4. ECM software issues or calibration errors.
  5. Mechanical issues with the throttle mechanism itself.

Symptoms of P1226 2005 Nissan Maxima

  1. Rough idling or stalling when coming to a stop.
  2. Poor acceleration or hesitation when pressing the gas pedal.
  3. Reduced fuel efficiency and increased emissions.
  4. Check Engine Light illuminated on the dashboard.
  5. Difficulty starting the engine or intermittent loss of power.

How to Fix P1226 2005 Nissan Maxima

  1. Begin by performing a thorough inspection of the throttle body, TPS, and related wiring to check for any visible damage or loose connections.
  2. Clean the throttle body using a specialized cleaner to remove any carbon build-up or debris that may be affecting its performance.
  3. Test the TPS using a multimeter to ensure it is providing accurate readings within the specified range.
  4. If the TPS is faulty, replace it with a new one and recalibrate it according to the manufacturer's specifications.
  5. Reset the ECM's learned values for the closed throttle position by using a diagnostic scanner to clear the code and perform a throttle relearn procedure.

Cost to Fix P1226 2005 Nissan Maxima

The cost of repairing a P1226 code on a 2005 Nissan Maxima can vary depending on the specific cause of the issue and the labor rates in your area. On average, you can expect to pay anywhere from $150 to $400 for parts and labor. Keep in mind that diagnostic time and labor rates can fluctuate, so it's recommended to get quotes from multiple auto repair shops to find the best price. Additionally, if the issue requires more extensive repairs or component replacements, the cost may increase accordingly.

What does this mean?

Tech Notes for P1226 2005 Nissan Maxima

You can try to clean the throttle body first before replacing anything. After clean or replacing the throttle body you will have to do an Idle Air Relearn and Throttle Valve Closed Position Learning



Idle Air Relearn



Throttle Valve Closed Position Learning

When is the Code Detected?

Closed throttle position learning is not performed successfully, repeatedly.

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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.

Frequently Asked Questions about P1226 2005 Nissan Maxima Code

1. What does the OBDII code P1226 mean on a 2005 Nissan Maxima?

P1226 indicates a "Closed Throttle Position Learning Performance Problem," meaning the throttle body is unable to properly learn or maintain the closed throttle position.

2. What are the common symptoms of code P1226 in a 2005 Nissan Maxima?

Symptoms may include rough idling, poor acceleration, stalling, reduced engine performance, and the check engine light turning on.

3. What causes the P1226 code on a 2005 Nissan Maxima?

Common causes include a dirty or faulty throttle body, a malfunctioning throttle position sensor (TPS), wiring issues, or a problem with the engine control module (ECM).

4. Can a dirty throttle body trigger code P1226?

Yes, a dirty or carbon-clogged throttle body can interfere with the throttle position learning process and trigger the P1226 code.

5. How can I fix code P1226 on my 2005 Nissan Maxima?

Start by cleaning the throttle body, ensuring the throttle plate moves freely, and performing a throttle position learning procedure. If the issue persists, inspect the throttle position sensor and related wiring.

6. What is the throttle position learning procedure for a 2005 Nissan Maxima?

The procedure involves turning the ignition on and off in a specific sequence, pressing the accelerator pedal, and allowing the ECM to recalibrate. Refer to the vehicle's service manual for exact steps.

7. Can I drive my 2005 Nissan Maxima with a P1226 code?

Driving with a P1226 code is possible but not recommended, as it may cause poor performance, stalling, or damage to the engine or throttle system over time.

8. Could a failing throttle position sensor cause the P1226 code?

Yes, a malfunctioning throttle position sensor can prevent the ECM from accurately learning the closed throttle position, leading to the P1226 code.

9. How much does it typically cost to repair a P1226 code on a 2005 Nissan Maxima?

Repair costs can vary, ranging from $100 to $300 for cleaning and recalibration, while replacing faulty components like the throttle body or sensor may cost $500 or more.

10. Is the P1226 code related to other throttle body issues?

Yes, it can often be related to or accompanied by other throttle body codes, such as P0507 (Idle Control System RPM Higher Than Expected) or P0123 (Throttle Position Sensor Circuit High Input).

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