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Why Can't the Car Start After Leaving the Headlights On for 20 Minutes?

1 Answers

DelKayden

07/29/25 7:07pm

The reasons why the car can't start after leaving the headlights on for 20 minutes are as follows: 1. Insufficient Voltage: When the battery voltage is insufficient, the horn and lights may still work, but they cannot power the starter. The battery light will illuminate when the key is in the ON position before starting the engine, indicating low battery voltage. Use a voltmeter to test the battery voltage. If it is below 10V, consider replacing the battery. 2. Poor Fuel Quality: Check the quality of the fuel added to the car to see if it is caused by carbon deposits. If the car has been driven around 20,000 kilometers, focus on inspecting and cleaning the throttle body and checking the ignition switch. Test and inspect the starter, fuel pump, sensors, and other components related to the starting and fuel supply systems. Additionally, after turning on the ignition, wait for 30 seconds to a minute before starting the engine to see if it makes a difference.

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