Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2001CAVALIER LS, 2.4 TREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 348 (THEFT DETERRENT SYSTEM)
2001 Chevrolet Cavalier LS, 2.4 T
Section 348 (Theft Deterrent System)
2001 Chevrolet Cavalier LS, 2.4 TSECTION Section 348 (Theft Deterrent System)
WARNING: This page is about a different car, the 2003 Pontiac Sunfire and 2003 Chevrolet Cavalier. However, it is still accessible from the selected car via links, so may be relevant.
- Schematic and Routing Diagrams
- Component Locator
- Diagnostic Information and Procedures
- Diagnostic Starting Point - Theft Deterrent
- Diagnostic System Check - Theft Deterrent
- Scan Tool Output Controls
- Scan Tool Data List
- Scan Tool Data Definitions
- Diagnostic Trouble Code (DTC) List
- DTC B2947: Short To Ground On Passlock™ Sensor Power Circuit
- DTC B2948: Sensed Battery Voltage
- DTC B2957: BCM Signal Input Voltage Low
- DTC B2958: BCM Signal Input Voltage High
- DTC B2960: BCM Reading A Valid But Different Code Value Than Previously Learned From Passlock™ Sensor
- DTC B3031: BCM Is In Learn Mode But Does Not See A Valid Passlock™ Sensor Code
- DTC B3033: Passlock™ Tamper
- DTC P1626: Loss Of State Of Health Serial Data Message From Theft Deterrent System
- DTC P1630: PCM Remains In Theft Deterrent Password Learn Mode
- DTC P1631: Incorrect Password From VTD System
- DTC P1632: PCM Received A Fuel Disabled Password Or An Undecided Password From BCM
- Content Theft Deterrent (CTD) Alarm Mode Inoperative
- Horn Inoperative in Content Theft Deterrent (CTD) Alarm Mode
- Lights Inoperative in Content Theft Deterrent (CTD) Alarm Mode
- Security Indicator Always On or Flashing
- Security Indicator Inoperative
- Repair Instructions
- Description and Operation
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.