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
Diagnostic Code Index
DIAGNOSTIC CODE INDEX
| DTC | Description |
|---|---|
| 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 |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.