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Engine-Codes – Infiniti – P1111 2003 Infiniti G35

P1111 2003 Infiniti G35 Code - Intake Valve Timing Control Solenoid Valve Circuit Bank 1

Quick Answer

The P1111 code for a 2003 Infiniti G35 specifically refers to an issue with the Intake Valve Timing Control Solenoid Valve Circuit in Bank 1. Common causes include Faulty Intake Valve Timing Control Solenoid Valve, Wiring issues or electrical faults in the circuit, Poor connections or corrosion in the solenoid valve circuit. 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
P1111 2003 Infiniti G35 indicates Intake Valve Timing Control Solenoid Valve Circuit Bank 1.
Common causes
Common causes include Faulty Intake Valve Timing Control Solenoid Valve, Wiring issues or electrical faults in the circuit, Poor connections or corrosion in the solenoid valve circuit.
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 Aug 30, 2024
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Code P1111 2003 Infiniti G35 Description

The P1111 code for a 2003 Infiniti G35 specifically refers to an issue with the Intake Valve Timing Control Solenoid Valve Circuit in Bank 1. This component is crucial for regulating the timing of the intake valves in the engine, which directly impacts the combustion process and overall engine performance. When this solenoid valve circuit malfunctions, it can lead to incorrect timing of the intake valves, causing a range of performance issues.

OBDII Code P1111 2003 Infiniti G35 - Intake Valve Timing Control Solenoid Valve Circuit Bank 1
P1111 2003 Infiniti G35 Code - Intake Valve Timing Control Solenoid Valve Circuit Bank 1

Common Causes of P1111 2003 Infiniti G35

  1. Faulty Intake Valve Timing Control Solenoid Valve
  2. Wiring issues or electrical faults in the circuit
  3. Poor connections or corrosion in the solenoid valve circuit
  4. Engine oil contamination affecting the solenoid operation
  5. Mechanical damage to the solenoid valve itself

Symptoms of P1111 2003 Infiniti G35

  1. Decreased engine performance
  2. Reduced fuel efficiency
  3. Rough idling or engine misfires
  4. Engine stalling
  5. Illumination of the check engine light

How to Fix P1111 2003 Infiniti G35

  1. Diagnose the specific cause of the issue using a scan tool to pinpoint the exact problem within the circuit.
  2. Inspect the wiring and connections associated with the Intake Valve Timing Control Solenoid Valve for any damage or corrosion.
  3. Test the solenoid valve itself to determine if it is functioning correctly or needs replacement.
  4. Replace the faulty solenoid valve or repair any wiring/electrical issues in the circuit.
  5. Clear the diagnostic trouble codes and test the vehicle to ensure the issue has been resolved.

Cost to Fix P1111 2003 Infiniti G35

The cost estimate for repairing a P1111 code related to the Intake Valve Timing Control Solenoid Valve Circuit in a 2003 Infiniti G35 can vary depending on the specific cause of the issue and the labor rates in your area. Generally, the cost of replacing the solenoid valve itself ranges from $150 to $300, while additional costs for diagnosis, labor, and any necessary parts could bring the total repair bill to $300 to $600. Keep in mind that rates for diagnostic time and labor can fluctuate, so it's advisable to seek quotes from multiple auto repair shops to get a more accurate estimate for your particular situation.

What does this mean?

Tech Notes for P1111 2003 Infiniti G35

Since the Intake valve timing control solenoid valve uses oil flow to control timing, dirty oil can cause the valve to stuck open or close. Before replacing the valve, change the engine oil and filter and reset the engine code. If the code comes back you can remove the Intake valve timing control solenoid and clean it with brake cleaner.

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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 P1111 2003 Infiniti G35 Code

1. What does code P1111 mean on a 2003 Infiniti G35?

Code P1111 indicates an issue with the Intake Valve Timing Control Solenoid Valve Circuit for Bank 1, which helps regulate valve timing for optimal engine performance.

2. What are the common symptoms of a P1111 code?

Symptoms may include reduced engine performance, poor fuel economy, rough idling, difficulty starting, or the check engine light being illuminated.

3. What causes the P1111 code on a 2003 Infiniti G35?

Common causes include a faulty intake valve timing control solenoid, damaged wiring or connectors in the circuit, low or dirty engine oil, or a failed engine control module (ECM).

4. Can dirty engine oil trigger the P1111 code?

Yes, dirty or low engine oil can restrict the solenoid’s operation, causing the code to appear. Regular oil changes are critical for proper solenoid function.

5. How do I fix the P1111 code on my Infiniti G35?

Check the intake valve timing control solenoid for proper operation, inspect wiring and connectors for damage, ensure oil is clean and at the correct level, and replace faulty components if necessary.

6. Where is the intake valve timing control solenoid located on a 2003 Infiniti G35?

The solenoid is typically located near the front of the engine on the cylinder head for Bank 1, which is the side of the engine containing cylinder 1.

7. Can I drive my Infiniti G35 with a P1111 code?

While it may be possible to drive with this code, it is not recommended as it can lead to reduced performance, potential engine damage, and increased emissions if not addressed promptly.

8. How much does it cost to fix a P1111 code on a 2003 Infiniti G35?

Repair costs vary but generally include $100–$300 for a new solenoid and additional labor costs if done by a mechanic. Diagnostic costs may also apply.

9. How can I prevent the P1111 code from returning?

Regular maintenance, including timely oil changes with the correct oil type, and periodic inspection of the solenoid and wiring, can help prevent this code.

10. Does a P1111 code always mean the solenoid is bad?

No, the code could also be caused by wiring issues, a clogged oil passage, or a malfunctioning ECM. Proper diagnostics are essential to identify the root cause.

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