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Home >> Chevrolet >> 1998 >> Monte Carlo LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - Tests W/Codes - 3.8L) >> Diagnostic Trouble Codes >> DTC P1631 - Theft Deterrent System Password Incorrect >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.

Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then perform password learn procedure. See ANTI-THEFT SYSTEM article in ACCESSORIES/SAFETY EQUIPMENT section.

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