Theft Deterrent System - No Password Received
2004-2007 Buick Rainier 4.2L I6
Description
The PCM did not receive the expected security password from the Body Control Module (BCM) or Vehicle Theft Deterrent module. The theft deterrent system disables the vehicle if the correct key/password is not verified.
Symptoms
- Vehicle will not start
- Check Engine Light
- Security light flashing
- Engine cranks but does not fire
- Intermittent no-start condition
Common Causes
- Faulty ignition key or key transponder
- Passlock sensor failure
- Body Control Module (BCM) malfunction
- Wiring issue between BCM and PCM
- Ignition lock cylinder failure
Diagnostic Steps
- Attempt start with known-good key
- Check security system indicator light status
- Test communication between BCM and PCM
- Inspect Passlock sensor connector
- Check for BCM-related codes
Repair Notes
Try 10-minute relearn: turn key to ON for 10 minutes until security light stops flashing, then turn off and restart. If persistent, replace Passlock sensor or BCM.
Related Codes
Other Powertrain Codes
- P0001Fuel Volume Regulator Control Circuit/Open
- P0002Fuel Volume Regulator Control Circuit Range/Performance
- P0003Fuel Volume Regulator Control Circuit Low
- P0004Fuel Volume Regulator Control Circuit High
- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P1502 on Other Vehicles
Common Questions
What does code P1502 mean on a 2004-2007 Buick Rainier?
P1502 stands for "Theft Deterrent System - No Password Received". The PCM did not receive the expected security password from the Body Control Module (BCM) or Vehicle Theft Deterrent module. The theft deterrent system disables the vehicle if the correct key/password is not verified.
What are the symptoms of P1502 on a Buick Rainier?
Common symptoms of P1502 include: Vehicle will not start, Check Engine Light, Security light flashing, Engine cranks but does not fire, Intermittent no-start condition.
What causes P1502 on a 2004-2007 Buick Rainier?
Common causes of P1502 include: Faulty ignition key or key transponder, Passlock sensor failure, Body Control Module (BCM) malfunction, Wiring issue between BCM and PCM, Ignition lock cylinder failure.