P2118 Infiniti Code - Throttle Control Motor Circuit Short Bank 1
Quick Answer
The P2118 code for Infiniti vehicles indicates a problem with the throttle control motor circuit on bank 1. Common causes include Wiring harness issues, Faulty throttle control motor, ECM malfunction. 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
- P2118 Infiniti indicates Throttle Control Motor Circuit Short Bank 1.
- Common causes
- Common causes include Wiring harness issues, Faulty throttle control motor, ECM malfunction.
- 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 P2118 Infiniti Description
The P2118 code for Infiniti vehicles indicates a problem with the throttle control motor circuit on bank 1. This code is specifically related to the electronic throttle control system, which plays a crucial role in regulating the engine's air intake and throttle response. The throttle control motor is responsible for adjusting the throttle valve position based on signals from the vehicle's engine control module (ECM). When this circuit experiences a short in bank 1, it can lead to various performance issues and potentially cause the vehicle to go into a limp mode, where the engine power is limited to prevent further damage.
Common Causes of P2118 Infiniti
- Wiring harness issues
- Faulty throttle control motor
- ECM malfunction
- Throttle position sensor failure
- Corrosion or damage to electrical connectors
Symptoms of P2118 Infiniti
- Reduced engine power
- Engine stalling or hesitation
- Rough idling
- Illumination of the check engine light
- Difficulty starting the engine
How to Fix P2118 Infiniti
- Begin by conducting a thorough inspection of the throttle control motor circuit and related components.
- Check the wiring harness for any signs of damage, corrosion, or loose connections. Repair or replace as necessary.
- Test the throttle control motor and throttle position sensor for proper functionality. Replace any faulty components.
- Clear the diagnostic trouble codes from the ECM using a scan tool and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, consult a professional mechanic for further diagnosis and repair.
Cost to Fix P2118 Infiniti
The typical repair costs for addressing the P2118 code on an Infiniti vehicle can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary depending on the location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's recommended to obtain quotes from local repair shops for a more accurate estimate.
When is the Code Detected?
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Frequently Asked Questions about P2118 Infiniti Code
1. What does the P2118 code mean on an Infiniti?
P2118 indicates a problem with the throttle control motor circuit, specifically a short in Bank 1, which can impact the throttle's ability to open and close properly.
2. What are the common symptoms of a P2118 code?
Symptoms include reduced engine power, poor acceleration, the throttle not responding correctly, and the activation of the vehicle's "limp mode."
3. What causes the P2118 code on an Infiniti?
The most common causes are a faulty throttle control motor, damaged wiring, a blown fuse, a bad throttle body, or a malfunctioning engine control module (ECM).
4. Can I drive my Infiniti with the P2118 code?
Driving with this code is not recommended, as it may cause reduced engine power and unsafe driving conditions. It’s best to address the issue promptly.
5. How do I diagnose the P2118 code on my Infiniti?
Start by inspecting the throttle control motor wiring and connectors for damage or corrosion. Then, test the throttle control motor for proper operation and check the ECM for faults.
6. How do I fix the P2118 code on an Infiniti?
Repairs may include replacing the throttle control motor, repairing damaged wiring, cleaning the throttle body, or reprogramming or replacing the ECM.
7. Can a dirty throttle body cause the P2118 code?
Yes, a dirty or clogged throttle body can restrict movement and trigger the P2118 code. Cleaning the throttle body may resolve the issue.
8. Is the P2118 code covered under warranty?
It depends on your vehicle’s warranty terms. Throttle-related repairs might be covered under the powertrain warranty if the vehicle is still within the warranty period.
9. How much does it cost to repair the P2118 code on an Infiniti?
Repair costs vary but typically range from $200 to $800, depending on whether the throttle body, wiring, or ECM needs repair or replacement.
10. Can a bad ECM cause the P2118 code?
Yes, a malfunctioning ECM can fail to regulate the throttle control motor properly and trigger the P2118 code.
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