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A check engine light can indicate a broad spectrum of problems with your 1994 Toyota 4Runner. In some cases you need to pull over immediately to prevent damage while in others you merely need to tighten you gas cap next time you stop in order to reset the service engine soon light. The video above shows how to locate the on board diagnostics (OBD) plug on your 1994 4Runner, how to read the trouble codes and how to reset or clear the check engine light using a scanner on your 4Runner.
Intermittent Check Engine Light: If the check engine light on your 1994 4Runner is intermittent, try to take note of the conditions when this happens. For example, does it happen when you accelerating, driving on the highway or does it appear at low speeds? This will help your mechanic evaluate the issue. Steady Check Engine Light: If your check engine light is on every time you operate your 4Runner, you need to have it checked as soon as possible, especially if you notice performance problems or unusual noises. Flashing Check Engine Light: If your check engine light is flashing, stop driving your 4Runner and have it towed to your nearest mechanic - you probably have a very serious problem with your car and you risk ruining your engine by driving it. If you are unsure about what your diagnostic trouble codes mean; have your 4Runner diagnosed by a professional automotive technician.
Don't send mixed signals - if your turn signal doesn't blink, or blinks rapidly, you likely have a burnt out bulb1994 Toyota 4Runner SR5 3.0L V6
Coolant hoses wear out over time and need to be replaced - check 'em early and often1994 Toyota 4Runner SR5 3.0L V6
Transmissions that leak fluid usually have never been flushed and the seal is finally leaking. The right stop leak product can cure a lot1994 Toyota 4Runner SR5 3.0L V6
Did you know that heat is worse for your battery than cold? Replace it every 4 years1994 Toyota 4Runner SR5 3.0L V6
If your brake fluid is a little low, learn how to add some here. Ignoring a low level leads to big problems1994 Toyota 4Runner SR5 3.0L V6
Leaking coolant is usually a sign that your water pump needs to be replaced. This video shows you how to quickly plug it1994 Toyota 4Runner SR5 3.0L V6