2006 INFINITI FX35 Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2006 INFINITI FX35: Common Causes and Solutions

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Reviewed by
Bo Fader
Written by RepairPal Car Genius
Updated January 14, 2025
0%
40% chance it's the
Emissions System
0%
60% chance it's
Something else
The most common reasons a 2006 INFINITI FX35 has a check engine light are an emissions system component, a sensor, or a catalytic converter.
  • Emissions System: A faulty emissions system component, such as an oxygen sensor or EGR valve, can lead to increased emissions and trigger the check engine light.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

How much does it cost to fix a 2006 INFINITI FX35 has a check engine light?

Common Repairs

The total repair cost will vary based on the condition of your vehicle and the number of repairs needed to fix your symptom. Proper diagnosis will save you money by finding the exact repairs needed to fix your car right the first time.

A faulty oxygen sensor is one of the most common causes of a check engine light. Symptoms may include a decrease in fuel mileage, hesitation or misfiring from the engine, rough idling or even stalling. A faulty sensor may cause the vehicle to fail an emissions test.

Any time there is an emissions fault the check engine light will be displayed. The purpose of the check engine light is to inform the driver that an emission related fault has been found, and that there are on-board diagnostic (OBD) trouble codes stored in the powertrain or engine control module. Additionally, since the emissions systems are so intertwined into engine control and transmission control systems, symptoms may include nearly any sort of drivability concerns. This may include harsh shifting, failure to shift, hesitation on acceleration, jerking, engine failure to start or run, loss of power, or any number of other drivability issues.

Due to the nature of electrical systems on modern vehicles, the range of problems these can cause are nearly limitless. However, there is a way to categorize them in two ways. Permanent and intermittent problems. Permanent problems appear and remain. This may be the vehicle will not start, the radio does not work, or the door chime will not turn off among many, many others. These problems are more straight-forward to diagnose since they present themselves at all time. This means there will always be a fault to find. Intermittent electrical problems, however, can be difficult or impossible to locate, since they appear then disappear without warning. The best case scenario for an intermittent issue is when replicating the problem is easily accomplished and understood. This allows a technician to make an issue semi-permanent, allowing them to find the fault. Other issues that come and go without warning and cannot be replicated on demand must occur when the technician is servicing the vehicle, otherwise there is no problem to correct. It is most important to understand that electrical system faults always require inspection, and can include the vehicle working in any manner, or not working at all.

Like we noted in the last section, general diagnosis symptoms are the most vague of the bunch. There are several diagnostic spectrums, electrical diagnosis, drivability diagnostics, engine diagnostics, transmission diagnostics, and the list could continue for about 5 or 10 more spectrums of diagnostics. The most important take-away here, is that general diagnostics are diagnostics that have no other spectrum in which they fit, or the problem is unknown. This means that any vehicle left outside of a repair facility with the keys and an authorization to perform diagnosis will be diagnosed under the general diagnosis spectrum.

When the Check Engine Light comes on, you may experience engine performance issues such as poor acceleration, rough idling, or an engine that won't start. In some cases, no abnormal symptoms will be experienced. Other systems like the transmission or ABS can cause the Check Engine Light to illuminate and lights for those systems can come on at the same time. Similar lights may say "Check Engine Soon", "Malfunction Indicator Light" or just "Check". In rare case the engine can overheat.

What are the initial diagnostic steps to take for a check engine light on a 2006 INFINITI FX35?

When faced with a check engine light on your 2006 INFINITI FX35, it's essential to adopt a systematic diagnostic approach to identify the underlying issue. Begin by checking the gas cap, as a loose or damaged cap is a common and easily fixable cause of the warning light. Next, utilize an OBD-II scanner to read any error codes from the vehicle's computer; these codes can provide critical insights into the problem. After that, visually inspect the engine for any obvious signs of damage, such as frayed wires or cracked hoses, which could indicate a more significant issue. Additionally, ensure that all essential fluid levels—like oil, coolant, and transmission fluid—are adequate, as low levels can also trigger the check engine light. If the light persists, consider performing a drive cycle to see if the light resets or if specific driving conditions cause it to illuminate again. Should these steps not resolve the issue, it may be time to consult a professional mechanic for a more thorough diagnosis. By following this structured approach, you can effectively narrow down the potential causes of the check engine light and take appropriate action.

What are the common problems that could cause the check engine light to illuminate in a 2006 INFINITI FX35?

When the check engine light comes on in a 2006 INFINITI FX35, it can be a source of concern for any DIY car owner. One of the most straightforward issues to check is the gas cap; a loose or damaged cap can easily trigger the light, so ensuring it is secure is a good first step. If the gas cap is not the culprit, the oxygen sensor may be malfunctioning, which is crucial for monitoring exhaust emissions and fuel efficiency. Another common issue is related to the catalytic converter, which can fail or become inefficient over time, leading to increased emissions and triggering the light. Additionally, problems with the mass airflow sensor can disrupt the air-fuel mixture, causing the engine to run poorly. Spark plugs and ignition coils are also frequent offenders; if they are faulty, they can lead to misfires, which will illuminate the check engine light. Lastly, an engine misfire itself, potentially caused by a bad spark plug or fuel injector, can signal deeper issues that need addressing. By understanding these common problems, DIY enthusiasts can take proactive steps to diagnose and potentially fix the issues before seeking professional help.

How urgent is it to address the check engine light in a 2006 INFINITI FX35?

When the check engine light illuminates in your 2006 INFINITI FX35, it is essential to recognize the urgency of the situation. This warning indicator is your vehicle's way of alerting you to potential issues within the engine or emissions system, which, if ignored, could escalate into more severe problems. While some triggers for the light may be minor and easily fixable, neglecting the warning can lead to costly repairs or even a breakdown. For DIY enthusiasts, the first step is to utilize an OBD-II scanner to retrieve diagnostic trouble codes, which can help identify the specific issue at hand. This proactive approach not only aids in understanding the problem but also empowers you to make informed decisions about whether to tackle the repair yourself or seek professional assistance. Remember, timely action is crucial; addressing the check engine light promptly can save you from significant damage and ensure your vehicle remains safe and reliable on the road.

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