What do you do when traveling down the road in your Jeep Wrangler and the jeep check engine light comes on? If you’re a typical Jeep owner, seeing that warning light causes some anxiety since you have no clue what it means or how to respond. 

Anxiety might also come from worrying about things you don’t know (such as how much they could cost). Just because the warning light has been illuminated doesn’t mean you must pull over and contact a towing service. However, getting your Jeep Wrangler examined as soon as possible is wise. If you disregard the warning, you might damage valuable engine parts.

What Does the Check Engine Light Mean?

The jeep wrangler check engine light is the most misunderstood light or indicator. The check engine light may appear in several distinct forms depending on the status of the vehicle’s onboard diagnostics system. 

Either the words “Check Engine” or an image of an engine or both may appear. This light will be either amber or red as a component of your car’s diagnostics system. Since the 1980s, onboard computers have been used to regulate and monitor vehicle performance, and your Jeep Wrangler is no exception. 

Examples include changing ignition timing in automatic transmissions, adjusting engine speeds, and installing stability control. That said, there isn’t just one cause for the check engine light to come on. A loose gas cap is one of the simplest fixes, whereas an engine knock requires professional attention.

Jeep Wrangler Check Engine Flashing  Due To Ignition Issues

Typically, issues with the car’s ignition system will cause the warning light to turn on. The ignition system comprises spark plugs, plug cables, and ignition circuit modules. These components ignite the fuel in the combustion chamber at precisely the right moment.

Multiple Explosions Occurring at Once

When the engine is misfiring, this is a frequent error code to be shown. This signifies a misfire in the engine, but the onboard computer cannot pinpoint which cylinder is causing the problem. In addition to faulty ignition parts, problems with the fuel system or the engine’s timing might trigger this error number. Unless, of course, each cylinder has its coil (distributor ignition).

Jeep Wrangler Check Engine Light On

Misfire in a Particular Cylinder 

When one of these codes is read, it indicates that a particular cylinder is misfiring. The flashing of the service engine soon warning light is never a good indication. Still, when one of these codes is present (and no others), the problem is nearly invariably isolated to a single spark plug or ignition coil. 

Of course, these aren’t the only codes that may appear in the case of a misfire.

Why Is My Jeep Wrangler Check Engine Light On

There might be a myriad of causes for the illumination. Some of them are:

  1. Issues with the fuel and air metering systems due to a faulty gas cap
  2. Problems with Transmission
  3. Worn-out spark plugs
  4. O2 Sensor
  5. Limiting emissions problems
  6. The trouble with the computer’s output circuit
  7. Defiantly an Outdated Battery
  8. Failures in the ignition system

This is why it’s crucial for someone without extensive auto expertise not to make assumptions about what a code implies. If your Jeep check engine light goes on due to a core problem, you should fix it as quickly as possible to avoid additional harm.

How to Reset the Check Engine Light of the Jeep Wrangler

If you’re driving and notice your Jeep’s check engine light is on, reset it by following these simple instructions.

  1. You’ll need to pop the hood to get to the battery.
  2. Get rid of the negative battery cable.
  3. Wait 20 minutes.
  4. Relink the battery’s negative terminal.

Once you’ve driven certain earlier models up to fifty miles, the system may be re-calibrated, so be sure to do that as well. Remember that you will also be resetting the security system and any other electronic systems you may have access to.

Jeep Wrangler

Is It A Misfire If The Engine Light Is Flashing?

Misfires in the engine are nearly usually indicated by the appearance of a check engine light flashing on the dashboard. If your car’s engine misfires, it’s sending unburned gasoline via the exhaust pipe. When an engine misfires, the catalytic converter may rapidly overheat, which is a major problem.

Symptoms of a Misfire

Usually, if your check engine light is flashing, it means that there is a misfire somewhere in your engine. Driving your automobile will be different, and you may detect new engine noises and odors. Here are some of the most typical signs of a misfire:

Rate of Acceleration and Idle

Misfiring cylinders cause the engine to function less efficiently. This will probably be noticeable while speeding up. The intensity of the jerky, rough sensation increases with increasing RPMs. You may also notice that the engine hesitates or stutters when accelerating quickly. Since the air-fuel ratio is most important at low speeds, you may also notice a harsh, uneven idle. The engine may stall at idling or rev erratically.

Erratic Vibrations or Shaking

It doesn’t matter whether you’re driving a V8 or a 4-cylinder; when one cylinder isn’t firing properly, the whole engine loses its balance. When accelerating or idle, the cabin will vibrate.

Loss of Power

A lack of power might also result from an engine misfire. This occurs when the engine is supplied with an improperly balanced air-fuel combination that is either excessively rich or too low. As a result, your vehicle may have sluggish acceleration or cannot reach speeds of more than 3500 RPM.

Distinctive Engine Noise

If you pay close attention, there may be a subtle change in the motor’s hum. When all eight cylinders of a V8 are firing in unison, the engine makes a unique purring sound. An engine with misfiring cylinders may sound weaker than usual.

A Smell of Gas

In addition to the misfire, you may detect the odor of gasoline, steam, or engine oil if a leak or damaged cylinders cause the problem.

Jeep Wrangler Check Engine Light


How do you fix a blinking check engine light?

The check engine light (CEL) flashing signifies a critical situation that calls immediate attention. If the check engine light is on, you should stop the vehicle and contact a towing agency. If your check engine light is flashing and you keep driving, you might harm your car’s internal systems beyond repair.

What does a flashing check engine light mean on a Jeep Wrangler?

The Jeep Wrangler’s flashing check engine light indicates an emergency and needs prompt service. When this light flashes, it’s generally because of a serious misfire letting gasoline escape the engine unburned.

How Much Does it cost to fix a Jeep Wrangler Check Engine Light?

Check Engine Light is For Maintenance on a Jeep Wrangler typically costs $95 total, including labor and supplies. Location-specific price differences are possible.

When anything is wrong with your car, the check engine light will stay on constantly as a warning. However, your little unease and worry have been amplified if the light is flashing. Take your vehicle to the closest reliable repair if the “check engine” light comes on.

How much does it cost to fix an engine misfire?

Depending on what caused the misfire, the price to fix or replace it might be anywhere from $100 to $1,000. Here are the most typical reasons for a misfire, along with an estimate of how much it would cost to fix them: $200-$1,000 for mediocre gasoline delivery. $100-$300 for defective spark plug wires.


If you see the check engine light on your Wrangler blinking, it’s best not to drive the vehicle until you can figure out what’s wrong with it and repair it. Let’s suppose it’s warning you that ignoring the issue will result in much higher repair costs. It would be best if you got urgent assistance from a professional Jeep Wrangler Check Engine Light mechanic. Check here if your Toyota check engine light comes on.


Nancy is a dedicated writer with years of experience. She is focused on the latest vehicle technology and high-end cars of various brands. She combines her passion for automotive advancements with a clear, engaging writing style, making complex topics accessible and enjoyable for her readers.

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