2013 Toyota FJ Cruiser Check Engine Light On

Resolve Check Engine Light Issues in 2013 Toyota FJ Cruiser

Find Repair Location
Reviewed by
Andrew Hajjar
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 2013 Toyota FJ Cruiser 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 2013 Toyota FJ Cruiser 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 2013 Toyota FJ Cruiser?

When faced with a check engine light on your 2013 Toyota FJ Cruiser, start your diagnostic journey with the simplest solutions. First, check the gas cap, as a loose or damaged cap is a frequent culprit that can trigger the light. If that doesn’t resolve the issue, utilize an OBD-II code reader to retrieve the trouble codes from your vehicle’s onboard computer. This tool is essential for identifying specific problems, as each code corresponds to a particular issue, such as a malfunctioning oxygen sensor or fuel system concerns. After obtaining the codes, interpret their meanings to gain insight into the potential problems. Additionally, pay attention to any other warning lights that may be illuminated, as they can provide further context about the issue at hand. Consulting your owner’s manual can also be beneficial, as it offers detailed explanations of warning signals and recommended actions. Lastly, observe whether the check engine light is steady or flashing; a flashing light indicates a more urgent problem that requires immediate attention. If these initial steps do not lead to a resolution, consider seeking assistance from a professional mechanic who can conduct a thorough diagnosis and necessary repairs. By following this structured approach, you can effectively troubleshoot the check engine light and take informed steps toward resolving the issue.

What are the common problems that could cause the check engine light to illuminate in a 2013 Toyota FJ Cruiser?

When the check engine light illuminates in a 2013 Toyota FJ Cruiser, it can signal a variety of underlying issues that are important to address promptly. One of the most frequent culprits is a loose or faulty gas cap, which can easily be checked and tightened or replaced if necessary. Another common issue involves the oxygen sensors; if they are dirty or malfunctioning, they may need cleaning or replacement to restore proper function. Additionally, problems with the catalytic converter can lead to serious engine damage, making it crucial to address any related symptoms quickly. Spark plug issues, such as wear or dirt, can cause misfires, while a malfunctioning mass airflow sensor can disrupt the air-fuel mixture, triggering the light as well. Other potential causes include faults in the ignition system, such as ignition coils or spark plug wires, and issues with the transmission or computer output circuits, which may require more advanced diagnostics. Environmental factors, like exposure to salty conditions, can also exacerbate these problems. To accurately diagnose the issue, using an OBD-II code reader is highly recommended, as it can provide specific error codes that guide your troubleshooting efforts. Many auto parts stores offer free code scanning services, making it easier for DIYers to pinpoint the problem and take appropriate action.

How urgent is it to address the check engine light on my 2013 Toyota FJ Cruiser?

When it comes to your 2013 Toyota FJ Cruiser, the check engine light serves as a crucial indicator of your vehicle's health, and understanding its behavior is essential for timely action. A blinking check engine light is a clear signal of a serious issue, often linked to engine misfires that can lead to significant damage, such as a compromised catalytic converter. In this scenario, immediate attention is necessary; safely pull over and seek professional diagnosis to avoid escalating repair costs. Conversely, a steady check engine light, while less urgent, still warrants prompt attention. It suggests that something is amiss, and while you can continue driving cautiously, delaying a visit to a mechanic could result in further complications, potentially affecting vital components like the oxygen sensor or spark plugs. For DIY enthusiasts, starting with simple checks, such as ensuring the gas cap is secure, can be a practical first step. However, if the light persists, a thorough diagnostic is essential to prevent minor issues from evolving into major repairs. By addressing the check engine light promptly, you not only safeguard your vehicle's performance but also protect your wallet from costly future repairs.

You’ve got options with RepairPal

Whether you need a more accurate auto repair estimate or help finding a reputable shop in your area, we’ve got you covered.

2013 Toyota FJ Cruiser Check Engine Light Issues & Solutions