2022 Mercedes-Benz A35 AMG Has A Check Engine Light

Check Engine Light Issues in 2022 Mercedes-Benz A35 AMG: 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 2022 Mercedes-Benz A35 AMG 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 2022 Mercedes-Benz A35 AMG 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.

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 2022 Mercedes-Benz A35 AMG?

When confronted with a check engine light on your 2022 Mercedes-Benz A35 AMG, it's essential to adopt a systematic diagnostic approach. Start by visually inspecting the gas cap; ensure it is securely tightened and free from damage, as a faulty gas cap is a common culprit for triggering the light. Next, pay attention to any additional dashboard indicators or warning messages that may offer further insights into the problem. Utilizing an OBD-II scanner is a crucial step in this process; by connecting it to the vehicle's diagnostic port, you can retrieve specific error codes that will guide you in identifying the underlying issue. Additionally, take note of any unusual symptoms your vehicle may be exhibiting, such as rough idling or poor acceleration, as these can provide valuable context for your diagnosis. By following these initial steps, you can effectively gather the necessary information to address the check engine light and potentially resolve the issue on your own.

What are the common problems that could cause the check engine light to illuminate in a 2022 Mercedes-Benz A35 AMG?

When the check engine light comes on in your 2022 Mercedes-Benz A35 AMG, it’s crucial to understand the common problems that could be at play. One frequent culprit is a loose gas cap, which can allow fuel vapors to escape and trigger the warning light. Another common issue is a faulty oxygen sensor, which not only affects fuel efficiency but can also lead to increased emissions. Additionally, problems with the catalytic converter, such as inefficiency or failure, can illuminate the check engine light. Engine performance can also be compromised by issues with spark plugs or ignition coils, leading to misfires that activate the warning. A malfunctioning mass airflow sensor can disrupt the air-fuel mixture, while problems with the EGR valve can result in emissions-related issues. Furthermore, a faulty thermostat may cause the engine to overheat or run inefficiently, and transmission problems, including low fluid levels, can also trigger the light. Addressing these issues promptly is essential to maintain your vehicle's performance and prevent further damage.

How urgent is it to address the check engine light in a 2022 Mercedes-Benz A35 AMG?

When the check engine light illuminates in your 2022 Mercedes-Benz A35 AMG, it signals a potential issue that requires immediate attention. Ignoring this warning can lead to a cascade of problems, including reduced fuel efficiency and performance degradation, which may ultimately result in costly repairs. The vehicle's advanced onboard diagnostics system is designed to help identify the specific issue, making it easier for DIY enthusiasts to troubleshoot. However, while some minor issues may be resolved at home, it is crucial to recognize that certain problems could pose safety risks or lead to significant engine damage if left unaddressed. Therefore, it is advisable to conduct a thorough inspection or consult a qualified mechanic to ensure that any underlying issues are diagnosed and rectified promptly, safeguarding both your vehicle's performance and your investment.

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