How to Unlock a Locked Engine?

2 Answers
EmilyMarie
07/29/25 6:55am
Solutions for a locked engine: At this point, simply use the key to unlock it. Generally, aftermarket keys may not be recognized as effectively. If the original key also fails to unlock, disconnect the negative terminal of the battery for a period of time. Wait for the engine's protection data to clear, then reconnect the battery. It usually takes about 10 seconds of disconnection before reconnecting. Reasons for engine lock due to external factors: If the engine is locked due to a collision causing it to sink and lock, repairs are necessary, and the lock will be released once fixed. If the lock is due to the computer system detecting non-system certified components, it is recommended to visit a 4S shop or a qualified repair center for unlocking.
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VonClaire
08/12/25 10:17am
When I found my car's engine was locked, my first reaction was not to panic and try using the spare key from the trunk. My car has a keyless ignition system, and a common issue is the key fob battery running out of power. Replacing the battery is simple and quick—just open the key fob casing and insert a new button cell. If the problem persists after replacing the battery, check if all the car doors are fully closed, as sometimes the anti-theft system activates and requires a 10-minute wait for it to reset automatically. Once, when my car was locked in a parking lot, I disconnected the negative terminal of the car battery for five minutes and reconnected it, successfully starting the engine. These methods save money and time, but if the issue occurs frequently, it's advisable to visit a 4S shop to check the wiring or programming to avoid breakdowns that could disrupt your travel plans.
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