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Q: do the pass lock sensor is a part of the anti-theft system? on 2004 Chevrolet Malibu

Rookie cbe0621eac06868b3efe0d8d1d3611e23c60d3114864ea2ec19a68cfbd3eebab
my car did not start and the anti-theft light was on.
I took it to a repair shop they replaced the pass lock sensor when i ask if it'll cause the anti-theft light come on?they said its nothing to do with the anti-theft system.
is it that true?
(1) Answer
They lied. The passlock sensor is part of the Anti-Theft system (or Immobilizer as they are called now). If the sensor is bad, the Theft Light will come on and the Cranking, Spark and Fuel delivery can all be disabled (depending on year/make/model).