2013 BMW 335is Has A Check Engine Light

Troubleshooting the Check Engine Light in Your 2013 BMW 335is: 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 2013 BMW 335is 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 BMW 335is 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 BMW 335is?

When faced with a check engine light on your 2013 BMW 335i, the first step is to check the gas cap, as a loose or damaged cap is a frequent culprit for triggering the warning. If the gas cap is secure, the next step involves using an OBD2 scanner to read the diagnostic trouble codes (DTCs) from your vehicle's onboard computer. This tool will provide specific codes that indicate which components may be malfunctioning, allowing you to focus your troubleshooting efforts. After addressing any issues indicated by the DTCs, if the light remains on, consider performing basic troubleshooting, such as inspecting the vehicle's sensors and connections. It’s crucial to act quickly when the check engine light appears, as ignoring it can lead to more severe problems down the line. Common issues in BMWs include faults with the oxygen sensor, gas cap, or catalytic converter, so being proactive in your diagnostics can save you time and money in the long run.

What common issues trigger the check engine light in a 2013 BMW 335is?

When the check engine light illuminates in a 2013 BMW 335is, it can be a source of concern for any DIY enthusiast. One of the most straightforward issues to check is the gas cap; a loose or damaged cap is often the simplest fix and can easily be overlooked. If the gas cap is secure, the next step is to inspect the spark plug wires, as faulty connections here can disrupt engine performance and trigger the light. Additionally, problems within the exhaust system, such as leaks or blockages, can also lead to the check engine light coming on, indicating a need for further investigation. Another common culprit is the oxygen sensor, which plays a crucial role in managing fuel efficiency and emissions; if it malfunctions, it can significantly impact vehicle performance. Lastly, don’t discount the possibility of electrical issues, which can be more complex but are equally important to address. Given that there are over 100 potential fault codes associated with the check engine light, utilizing a diagnostic scanner can be invaluable in pinpointing the exact issue. Regular maintenance and prompt attention to these common problems can help you avoid more serious repairs and keep your BMW running smoothly.

How urgent is it to address the check engine light on a 2013 BMW 335is?

Addressing the check engine light on your 2013 BMW 335is is not just a matter of convenience; it is a critical safety and maintenance issue that demands immediate attention. Ignoring this warning can lead to escalating problems, such as engine damage or decreased fuel efficiency, which can result in significantly higher repair costs down the line. Common triggers for the check engine light include issues with essential components like the oxygen sensor, catalytic converter, and spark plugs, all of which play vital roles in your vehicle's performance and emissions control. Additionally, seemingly minor issues, such as a loose gas cap, can also activate the light, but they should not be overlooked as they may indicate larger underlying problems. Therefore, it is crucial to have your vehicle inspected by a qualified mechanic as soon as the check engine light illuminates. Prompt action not only helps maintain your BMW's performance but also ensures your safety on the road, making it imperative to address this warning without delay.

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