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.
2009 Chrysler PT Cruiser Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Occupant Classification Module (OCM) - Electrical Diagnostics
- Diagnostic Code Index
- DTC Troubleshooting
- B1B78-Passenger Seat Weight Sensor 3 - Left Front Performance
- B1B79-Passenger Seat Weight Sensor 3 - Left Front Input Circuit Low
- B1B7A-Passenger Seat Weight Sensor 3 - Left Front Input Circuit High
- B1B7D-Passenger Seat Weight Sensor 2 - Right Front Performance
- B1B7E-Passenger Seat Weight Sensor 2 - Right Front Input Circuit Low
- B1B7F-Passenger Seat Weight Sensor 2 - Right Front Input Circuit High
- B1B82-Passenger Seat Weight Sensor 4 - Left Rear Performance
- B1B83-Passenger Seat Weight Sensor 4 - Left Rear Input Circuit Low
- B1B84-Passenger Seat Weight Sensor 4 - Left Rear Input Circuit High
- B1B87-Passenger Seat Weight Sensor 1 - Right Rear Performance
- B1B88-Passenger Seat Weight Sensor 1 - Right Rear Input Circuit Low
- B1B89-Passenger Seat Weight Sensor 1 - Right Rear Input Circuit High
- B1B8C-Driver Seat Track Position Sensor Circuit Performance
- B1B8D-Driver Seat Track Position Sensor Circuit Low
- B1B8E-Driver Seat Track Position Sensor Circuit High
- B1B91-Driver Seat Track Position Sensor Configuration Mismatch
- B1B92-Passenger Seat Track Position Sensor Circuit Performance
- B1B93-Passenger Seat Track Position Sensor Circuit Low
- B1B94-Passenger Seat Track Position Sensor Circuit High
- B1B97-Passenger Seat Track Position Sensor Configuration Mismatch
- B1BA6-Occupant Classification Undetermined
- B1BA7-Occupant Classification System Verification Required
- B1BA8-OCM System Out Of Calibration/Not Calibrated
- B1BAA-Occupant Classification Module Configuration Mismatch
- B1BBA-Passenger Seat Weight Sensor Supply Circuit
- B1BBB-Passenger Seat Weight Sensor Inputs Shorted Together
- B1BBC-OCS Negative System Weight
- B1BBD-OCM Current Configuration Table Unprogrammed
- B1BC8-Passenger Seat Weight Sensors Performance
- B2101-Ignition Run/Start Input Circuit Low
- B2102-Ignition Run/Start Input Circuit High
- B210D-Battery Voltage Low
- B210E-Battery Voltage High
- B212C-Ignition Run/Start Input Circuit Open
- B212D-Ignition Run Only Input Circuit Open
- B223B-Vehicle Configuration Mismatch
- B223D-Occupant Classification Module DTC Present
- B2212-Occupant Classification Module Internal
- B2206-Current VIN Missing/Mismatch
- U0154-Lost Communication With Occupant Classification Module
- U1419-Implausible Data Received From OCS Sensor 3 - Left Front
- U141A-Implausible Data Received From OCS Sensor 2 - Right Front
- U141B-Implausible Data Received From OCS Sensor 4 - Left Rear
- U141C-Implausible Data Received From OCS Sensor 1 - Right Rear
- Standard Procedure
Factory Service Tools
Use the Manual With the Right Hardware
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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.