Chevrolet Bolt EV Has A Check Engine Light

Troubleshooting the Check Engine Light in Your Chevrolet Bolt EV: 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 Chevrolet Bolt EV 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 Chevrolet Bolt EV 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.

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.

Troubleshooting Check Engine Light in a Chevrolet Bolt EV

When faced with a Check Engine Light in your Chevrolet Bolt EV, the first step is to understand that this warning indicates a fault detected by the vehicle's onboard computer. Begin by using an OBD-II scanner to read the trouble codes, which can provide insight into the specific issue at hand. This diagnostic tool is essential for any DIY enthusiast, as it allows you to pinpoint problems without guesswork. If the light is flashing, it signals a more serious issue that requires immediate attention, so don’t delay in addressing it. After identifying the codes, you can research potential fixes, starting with simpler solutions such as checking for loose gas caps or battery connections. If the problem seems more complex, such as issues with the propulsion system, it may be wise to consult a certified mechanic for further diagnosis. Remember, ignoring the Check Engine Light can lead to more significant problems down the line, so taking prompt action is crucial for maintaining the performance and longevity of your vehicle.

What Common Problems Could Cause the Check Engine Light to Illuminate in a Chevrolet Bolt EV?

When the check engine light comes on in your Chevrolet Bolt EV, it can be concerning, but understanding the common issues can help you troubleshoot effectively. One of the most frequent causes is a loose or missing gas cap, which is an easy fix that can often be resolved by simply tightening or replacing the cap. Another potential issue is a malfunctioning oxygen sensor, which plays a crucial role in monitoring the engine's air-fuel mixture; if this sensor fails, it can lead to decreased fuel efficiency and increased emissions. Additionally, problems with the catalytic converter can trigger the check engine light, indicating that it may not be effectively converting harmful gases. An air flow sensor malfunction can also be a culprit, as it affects the engine's performance by measuring the amount of air entering the engine. Lastly, ignition coil problems or faulty spark plugs can cause engine misfires, leading to the light illuminating. Addressing these issues promptly not only helps maintain your vehicle's performance but also prevents further damage, making it essential for any DIY enthusiast to be aware of these common problems.

Why is the Check Engine Light On in a Chevrolet Bolt EV?

When the Check Engine Light illuminates in your Chevrolet Bolt EV, it is crucial to understand that this warning is not just a minor inconvenience; it signifies potential issues that could escalate if left unaddressed. Ignoring the light can lead to significant problems, such as decreased fuel efficiency, engine misfires, or even severe engine damage. For DIY enthusiasts, the first step is to diagnose the issue accurately, as symptoms like rough engine performance or a flashing light indicate urgent problems that require immediate attention. A simple check, such as ensuring the gas cap is tightly secured after refueling, can sometimes resolve the issue, but if the light persists, it may point to more serious concerns like a malfunctioning oxygen sensor or catalytic converter. By taking the time to investigate and resolve the underlying causes of the Check Engine Light, you not only enhance your vehicle's performance but also ensure your safety on the road. Remember, timely intervention can save you from costly repairs down the line, making it essential to act swiftly when this warning appears.

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