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P0227 2003 Infiniti G35 Code - Throttle Position Sensor 2 Circuit Low Input

Quick Answer

The P0227 diagnostic trouble code (DTC) in a 2003 Infiniti G35 indicates that there is a low input signal coming from the throttle position sensor 2 (TPS). Common causes include Faulty throttle position sensor 2, Wiring issues or poor electrical connections in the TPS circuit, Corrosion or contamination in the TPS sensor. 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
P0227 2003 Infiniti G35 indicates Throttle Position Sensor 2 Circuit Low Input.
Common causes
Common causes include Faulty throttle position sensor 2, Wiring issues or poor electrical connections in the TPS circuit, Corrosion or contamination in the TPS sensor.
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 13, 2024
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Code P0227 2003 Infiniti G35 Description

The P0227 diagnostic trouble code (DTC) in a 2003 Infiniti G35 indicates that there is a low input signal coming from the throttle position sensor 2 (TPS). The TPS is a crucial component of the vehicle's electronic throttle control system, responsible for monitoring the position of the throttle pedal and sending this information to the engine control module (ECM). The ECM uses this data to determine the appropriate fuel delivery and ignition timing for optimal engine performance.

OBDII Code P0227 2003 Infiniti G35 - Throttle Position Sensor 2 Circuit Low Input
P0227 2003 Infiniti G35 Code - Throttle Position Sensor 2 Circuit Low Input

Common Causes of P0227 2003 Infiniti G35

  1. Faulty throttle position sensor 2
  2. Wiring issues or poor electrical connections in the TPS circuit
  3. Corrosion or contamination in the TPS sensor
  4. ECM software or hardware malfunction
  5. Mechanical issues affecting the throttle body operation

Symptoms of P0227 2003 Infiniti G35

  1. Poor acceleration or hesitation when pressing the throttle pedal
  2. Rough idling or stalling at idle
  3. Decreased fuel efficiency
  4. Check Engine Light illuminated on the dashboard
  5. Limited engine power or speed

How to Fix P0227 2003 Infiniti G35

  1. Begin by conducting a thorough inspection of the TPS 2 sensor and its wiring harness for any visible damage or corrosion.
  2. Use a multimeter to test the voltage output of the TPS sensor and compare it to the manufacturer's specifications.
  3. If the sensor is faulty, replace it with a new OEM or high-quality aftermarket part.
  4. Clear the DTC from the ECM memory using a diagnostic scanner and perform a test drive to ensure the issue has been resolved.
  5. If the problem persists, further diagnostics may be necessary to identify any underlying issues with the throttle control system.

Cost to Fix P0227 2003 Infiniti G35

The cost of repairing a P0227 code in a 2003 Infiniti G35 can vary depending on the specific cause of the issue and the labor rates in your area. On average, the replacement of a throttle position sensor 2 can range from $100 to $200, including parts and labor. Additional diagnostic time and potential wiring repairs may incur extra costs. It's recommended to consult with a trusted mechanic or dealership to get a more accurate estimate based on your vehicle's condition and location. Keep in mind that labor rates can fluctuate, so it's advisable to compare prices from different auto repair shops before proceeding with the repair.

When is the Code Detected?

An excessively low voltage from the Throttle Position Sensor (TPS) is sent to Engine Control Module (ECM).

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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 P0227 2003 Infiniti G35 Code

1. What does the OBDII code P0227 mean on a 2003 Infiniti G35?

P0227 indicates a problem with the Throttle Position Sensor (TPS) 2 circuit, specifically that it is receiving a low input voltage signal.

2. What are the common symptoms of code P0227 in a 2003 Infiniti G35?

Symptoms may include poor acceleration, engine stalling, reduced power, the vehicle entering limp mode, and the Check Engine Light turning on.

3. What causes the P0227 code in a 2003 Infiniti G35?

Possible causes include a faulty Throttle Position Sensor 2, damaged or corroded wiring/connectors, a malfunctioning throttle body, or issues with the Engine Control Module (ECM).

4. Can I drive my 2003 Infiniti G35 with a P0227 code?

It’s not recommended to drive with this code active, as it may cause unsafe driving conditions due to reduced power or engine stalling.

5. How do I diagnose the P0227 code on my Infiniti G35?

Start by inspecting the TPS 2 and its wiring for damage or corrosion. Use a multimeter to check the sensor’s voltage and continuity, and scan the ECM for related codes.

6. How do I fix a P0227 code on a 2003 Infiniti G35?

Repairs may include replacing the faulty TPS 2, repairing or replacing damaged wiring, cleaning the throttle body, or reprogramming or replacing the ECM if necessary.

7. How much does it cost to repair a P0227 code on a 2003 Infiniti G35?

The cost can vary, but replacing a Throttle Position Sensor typically ranges from $100 to $300, including parts and labor, depending on the shop and location.

8. Does a dirty throttle body cause the P0227 code on an Infiniti G35?

While not a direct cause, a dirty throttle body can contribute to sensor misreadings or performance issues, so cleaning it may help resolve the problem.

9. What tools are needed to fix the P0227 code on a 2003 Infiniti G35?

You’ll need a multimeter for electrical testing, a scan tool or OBDII reader, basic hand tools, and possibly contact cleaner for cleaning connectors.

10. Can a bad battery cause the P0227 code on my Infiniti G35?

A weak or failing battery can create voltage issues that might affect the TPS circuit, so it’s worth checking the battery and charging system as part of the diagnosis.

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