What to Do When There is a Gear Exclamation Mark on the Dashboard?

2 Answers
VanCameron
08/29/25 2:17am
If there is a gear exclamation mark on the dashboard, you must not continue driving. Call the 4S store as soon as possible and request assistance from professionals. The gear exclamation mark warning light on the dashboard is the TCU fault indicator, which is the transmission system warning light. When this symbol appears, it indicates an abnormality in the transmission. TCU refers to the automatic transmission control unit, which enables automatic transmission adjustment, making driving simpler. The TCU fault indicator light may illuminate due to oil leakage from the transmission housing or oil pan. One reason could be aging seals causing poor sealing, while another reason might be manufacturing defects leading to porosity in the housing.
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LaHector
09/10/25 7:05am
When I see the gear exclamation mark warning light on the dashboard, the first thing that comes to mind is that it's a symbol for automatic transmission issues. As a seasoned driver with over ten years of experience, I immediately find a safe place to pull over, turn off the engine, and restart to see if the light disappears. If it stays on, it’s most likely due to insufficient or degraded transmission fluid. I usually check the dipstick myself, ensuring the vehicle is parked on level ground. If the fluid level is low, I top it up with the appropriate fluid to try and resolve the issue. However, I never force the car to keep driving, as this could worsen internal wear and lead to costly repairs in the tens of thousands. Remember to change the transmission fluid every 50,000 kilometers—this preventive measure has worked wonders for me, and my car has never had major issues. Also, pay attention to whether gear shifts are smooth while driving. If you notice any jerking or hesitation, get it checked immediately—safety always comes first.
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