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Q: passlock code on 2002 Pontiac Grand Am

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i have a code--B2960 passlock cylinder data incorrect with a history code P1630C theft determent lean mode active

i need to see which module(s) or sensor(s) need to be replaced
(1) Answer
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The most common cause of the theft system related fault codes you have is a faulty passlock sensor. The passlock sensor in your 2002 Pontiac Grand Am is part of the ignition lock cylinder (not the ignition switch). A theft system relearn procedure must be completed after the ignition lock cylinder is replaced in order for the engine to start and run.