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  1. GMC Denali P1631 Code and Ignition Passlock Relearn - JustAnswer

    The P1631 code indicates an issue with the Passlock or anti-theft system. Common causes include a faulty ignition switch, damaged Passlock sensor, or wiring problems. Start by inspecting the ignition …

  2. 1999 Silverado P1631 Code No Spark After Security Fault - JustAnswer

    1999 Silverado 5.3 P1631 Code and No Spark Issue Explained Silverado 5.3 often faces intermittent security faults and no spark conditions after long inactivity or battery disconnection.

  3. Chevy Code P1631: How to Bypass and Fix | JustAnswer

    2002 Chevy: Diagnosing Code P1631 and Starting Issues Model often faces battery drain and ignition switch faults causing starting problems. Code P1631 indicates an issue with the vehicle’s security or …

  4. Q&A: How to Correct Fault Code P1631 Theft Deterrent Signal ...

    Fault code P1631 indicates a Theft Deterrent Signal Not Correct error, often caused by a faulty Passlock sensor or wiring issues. Start by inspecting the Passlock sensor on the ignition lock cylinder for …

  5. Q&A: Understanding P1631 Code in Mini Cooper - Expert Insights

    Mini Cooper 2008 P1631 Code: Causes and Fixes Mini Cooper often shows persistent P1631 code and related issues with ignition or immobilizer systems. The P1631 code in a 2008 Mini Cooper indicates …

  6. 2011 Chevy Silverado Hybrid Fault Codes? Expert ... - JustAnswer

    2011 Chevy Silverado Hybrid: Diagnosing Fault Codes P0513-00 & P1631-00 Silverado hybrid models often face battery sensor faults and communication errors causing warning lights. Code P0513-00 …

  7. Ford Transit Fault Codes P1664, P1564, P1631 - Q&A on JustAnswer

    Customer: I have a 2003 Ford Transit with fault codes P0403, P1564, P1665, P1631, and P1664. Can someone explain how to resolve these issues? I have some understanding of these codes; one …

  8. Peugeot 208,P1631 not start after battery discharged. - MHH AUTO

    Oct 9, 2022 · Greetings. French vehicles tend to damage the software inside the BSI and ECU when the battery voltage gets too low or with huge current spikes. Best option is to do BSI virgin and re …

  9. 1999 Escalade Won't Start? PCM & Anti-Theft Troubleshooting Guide

    1999 escalade. sometimes it doesn't start. PCM code p1631c says, anti-theft device power control module/instrument panel

  10. Ford Transit 2.4 P1631 Q&A: PCM Main Relay Location & Fuel Pump …

    Code P1631 indicates a main relay power hold fault affecting fuel injection. Check the main relay for proper operation and secure connections. Inspect wiring harnesses for damage or corrosion. Since …