A bad brain will cause everything to go haywire and nothing will work properly. It controls almost everything in the modern car such as the light bulb and whole fuel injection. ECU Sending Wrong SignalsĪn ECU of the car is like the brain of the whole car. Hence a bad water pump can cause the battery light on and engine overheating. It will ultimately cause the alternator to not produce enough electricity and as a result that the car battery sign will turn on automatically. Also, a seized water pump will cause very high resistance and as a result of that, the accessory belt will stop spinning. Stuck Water PumpĪ bad water pump can cause the car to overheat as it would not be able to circulate the water properly. In some cars, the water pump is electric and a bad alternator will not help it to run efficiently, causing overheating and battery light on the dash. High voltage can cause the temperature meter to show an unusually high reading, fooling into thinking that the car is overheating. Failing Car AlternatorĪ bad alternator, then it won’t sufficiently charge the battery as it is supposed to, while the engine is running, it can cause the charge to deplete faster than usual and can also spike voltage. This can be very dangerous as the oil temperatures and engine head temperature will rise exponentially and can do a lot of damage to the engine. In this case, the water pump and the alternator, do not spin, and this is why the battery light and overheating conditions happen at the same time. If the accessory drive belt that, turns your alternator and water pump is broken or failed due to poor part quality then it can cause overheating and the car battery to be on continuously. These problems can be explained in the following ways- 1. What Causes B attery Light On And Engine Overheating? How Much Will It Cost To Fix Overheating And Electrical Issues?.How Dangerous Overheating And Battery Light Issues Can Be?.How To Repair Car Overheating And Charging Issues?.What Causes Battery Light On And Engine Overheating?.
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