Passenger Seat Position Sensor Circuit Malfunction
What does B0029 mean?
The B0029 code means the vehicle's onboard diagnostic system has detected: Passenger Seat Position Sensor Circuit Malfunction. This is a low severity code.
Common Symptoms
- Passenger seat memory not functioning
- Passenger seat position not saved
- Warning message for seat system
- Power passenger seat erratic movement
- Seat position display incorrect
Probable Causes (Ranked by Likelihood)
- Failed passenger seat position sensor Very High
- Wiring damage under passenger seat High
- Corroded seat track connector Moderate
- Passenger seat control module failure Low
Step-by-Step Diagnostic Procedure
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Scan for passenger seat related DTCs
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Check seat position sensor signal with scan tool
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Inspect wiring and connectors under passenger seat
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Test seat position sensor resistance values
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Verify power and ground supply to sensor
Frequently Asked Questions
Is the passenger seat sensor different from the occupant classification sensor?
Yes. The position sensor tracks the seat location on its rails for memory recall, while the occupant classification sensor measures passenger weight and size for airbag deployment decisions.
Can items stored under the seat cause this?
Yes. Items pushed under the passenger seat can damage wiring harnesses or pinch connectors, which is a common cause of this code.
Does this affect passenger airbag operation?
Generally no. This code relates to the seat memory position system, not the occupant detection system. However, both systems should be checked during diagnosis.