B0320 code meaning
Passenger Seat Position Sensor Circuit
What B0320 means
None of the J2012 lists on hand names B0320, and no vehicle maker publishes a definition. The title concerns position feedback on a powered front passenger seat, which exists mainly where that seat has memory or an easy-entry function. Saab's 9-3 passenger seat module uses B2375 for its fore-aft sensor: 01 when the input exceeds 7 ± 0.2 V, 04 for an open line; either way memory functions stop and calibrated end stops are lost. US6320341B1 avoids a separate sensor by counting the current ripple of the DC motor, while US5751129A builds the sensors into the memory module. The driver-side counterpart is B0310; fore-aft motor faults on this seat are B0570.
B0320 at a glance
- Check engine lightUsually not
- Emissions testNot an emissions code
- Limp modeNot expected
- Repair difficultyMedium, DIY possible
- Typical labor0.5 to 2.5 hours
- Clears after repairWhen cleared with a scanner
Symptoms of B0320
- Passenger seat memory or easy-entry does not work
- Seat jerks when starting or stopping
Common causes of B0320
- Most likelyPosition sensor in the passenger seat motor failed
- Most likelySeat loom damaged by objects or feet under the seat
- PossibleSensor signal shorted to supply voltage
- Less likelyPassenger seat module input faulty
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
Seat position sensorSeat control moduleSeat harness
What each part of B0320 means
| B | Body system: airbags, seat belts, power seats, lights and climate control. |
| 0 | Generic code: it means the same on every make (SAE standard). |
| 20 | The exact fault in that area. |
What to do next
- Note B0320 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about B0320
What does B0320 mean?
B0320 means "Passenger Seat Position Sensor Circuit". None of the J2012 lists on hand names B0320, and no vehicle maker publishes a definition. It is a generic code, so it means the same on every make.
Is it safe to drive with B0320?
B0320 does not normally turn on the check engine light by itself. Watch for the symptoms above and have it checked soon.
Will B0320 fail an emissions test?
B0320 is not an emissions code, so on its own it usually does not fail an emissions test. Other stored codes or a lit check engine light still can.
How hard is B0320 to fix?
Difficulty: medium. A typical repair takes 0.5 to 2.5 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will B0320 clear itself after the repair?
Clear the code with a scanner after the repair. If the fault is fixed, it does not come back.