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Will low transmission fluid cause wrench light to come on?

Yes, low transmission fluid can cause the wrench light, also known as the check engine light, to come on in your vehicle. The wrench light is an indicator that there is an issue with your vehicle's powertrain, which includes the transmission. Low transmission fluid levels can trigger this warning light to alert you to a potential problem.


Understanding the Wrench Light and Transmission Fluid


The wrench light, or check engine light, is a dashboard indicator that illuminates when the vehicle's onboard computer detects a problem with the engine, transmission, or other powertrain components. One common cause of the wrench light is low transmission fluid levels.


Transmission fluid is essential for the proper operation of your vehicle's transmission. It lubricates the internal components, helps to cool the transmission, and facilitates the smooth shifting of gears. If the transmission fluid level drops too low, it can lead to increased friction, heat, and wear on the transmission, which can trigger the wrench light to illuminate.


Causes of Low Transmission Fluid


There are several reasons why the transmission fluid level may drop, including:



  • Leaks in the transmission system

  • Wear and tear on the transmission seals and gaskets

  • Failure to regularly check and top up the transmission fluid

  • Damage to the transmission itself, leading to fluid loss


If the wrench light comes on and you suspect low transmission fluid as the cause, it's important to have the issue diagnosed and addressed as soon as possible to prevent further damage to your vehicle's transmission.


Addressing Low Transmission Fluid


If you notice the wrench light illuminated, the first step is to check the transmission fluid level. Consult your vehicle's owner's manual for the proper procedure to check and top up the fluid if necessary. If the fluid level is low, add the recommended type and amount of transmission fluid, then check for any leaks or other issues that may be causing the fluid loss.


If the wrench light remains on after adding fluid, or if the fluid level continues to drop, it's important to have your vehicle inspected by a qualified mechanic. They can diagnose the underlying cause of the low fluid level and recommend the appropriate repairs to address the issue and prevent further damage to your vehicle's transmission.

How to get wrench light off?


The wrench light is a permanent feature of your vehicle's monitoring system and cannot be permanently turned off.



Why does the wrench light keep coming on?


Wrench light indicates that a non-emissions fault has been detected. Usually related to the electronic throttle or transmission. Hook up to a good quality scanner and retrieve the codes. Don't throw any parts at it until you've done so. Be warned that cheap scanners will not read non-emissions codes.



Will transmission fluid throw a code?


A trouble code or dash light does not necessarily mean the transmission fluid is low, but a low transmission fluid level will cause the check engine light to illuminate on most modern vehicles. If the light comes on, get your vehicle into a repair facility as soon as you can to get a proper diagnosis.



What does a wrench icon mean on your dashboard?


As you drive in Suwanee, you might notice a yellow or green warning light that features a wrench with the open portion pointed upward, or a symbol of a car with a wrench lying vertically in the center of it. What does the wrench light mean? Both of these symbols indicate that your car needs service.



Can you still drive with the wrench light on?


If it's for an oil change or service, then yes, you can drive with one. Otherwise, it's not recommended to take your vehicle out for long periods. Before driving with an illuminated wrench light, you have to figure out what's causing it first.



How does a car act when it needs transmission fluid?


Difficulty Shifting Gears - If you ever accelerate and hear your engine rev, but don't feel your car go any faster, your transmission is likely stuck in gear. Drivers with a manual transmission will feel some resistance when you try to shift. Not being able to shift is a direct result of having low transmission fluid.



What light comes on when transmission fluid is low?


A simple one is that the check-engine light can become illuminated. This doesn't necessarily mean that there is a problem with the transmission fluid, but it can signal that there is an issue inside the vehicle. If you see this light in conjunction with other signs, then it should be taken in for service.



What light comes on when your transmission is bad?


Often (though not always) a faulty transmission will trigger an engine diagnostic code and trip the Check Engine Light to let you know. Same goes if your engine overheats because of a bad transmission. Problems with a solenoid, speed sensor, slippage, and more can cause the Check Engine Light to come on.



What are symptoms of low transmission fluid?


In the meantime, it's a good idea to familiarize yourself with the tell-tale signs that you may be low on transmission fluid.

  • Noises.
  • Burning Smell.
  • Transmission Leaks.
  • Slipping Gears.
  • Slow Gear Engagement.
  • Vehicle Accelerates Poorly.
  • Check Engine or Transmission Warning Light Is On.



What code will low transmission fluid cause?


p0868 Code - Transmission Fluid Pressure Low | KBB.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.