Faulty passenger seat occupant position sensor; Damaged or chafed wiring harness under the seat; Loose or corroded electrical connector at the sensor or module; Seat track obstruction or mechanical binding affecting sensor movement; Failed occupant detection module or body control module; Aftermarket seat covers or accessories interfering with sensor operation

DTC codes / B00xx · Airbags, seats, doors, lights and comfort systems / B00C7

B00C7Passenger Seat Occupant Position Sensor A

Q: What does code B00C7 mean?

Passenger Seat Occupant Position Sensor A. B00C7 indicates that the body control module or occupant detection module has detected a fault in the passenger seat occupant position sensor circuit, specifically the 'A' sensor. The computer monitors the sensor's signal voltage and has found it outside the expected range, intermittent, or implausible for the seat's actual position.

B00C7 indicates that the body control module or occupant detection module has detected a fault in the passenger seat occupant position sensor circuit, specifically the 'A' sensor. The computer monitors the sensor's signal voltage and has found it outside the expected range, intermittent, or implausible for the seat's actual position.

SystemBody

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaAirbags, seats, doors, lights and comfort systems

Symptoms you may notice

Airbag warning light illuminated on the dashboard
Passenger airbag may be automatically disabled even with an adult seated
Passenger seat position memory or easy-entry feature may not function
Intermittent warning light that comes and goes over bumps
Often no symptoms besides the warning light

Common causes, most likely first

Faulty passenger seat occupant position sensor
Damaged or chafed wiring harness under the seat
Loose or corroded electrical connector at the sensor or module
Seat track obstruction or mechanical binding affecting sensor movement
Failed occupant detection module or body control module
Aftermarket seat covers or accessories interfering with sensor operation

How to diagnose and fix it

Inspect the under-seat wiring and connectors for damage, corrosion, or loose pins
Check for obstructions or debris in the seat track that could bind the sensor
Verify sensor resistance or voltage output with a multimeter and compare to manufacturer specifications
Perform a scan tool calibration or relearn procedure for the occupant detection system
Replace the passenger seat occupant position sensor if testing confirms it is out of specification
Repair or replace damaged wiring and connectors as needed
Clear the code and verify the repair with a test drive and scan tool

Before you replace the occupant sensor

A common oversight is a loose connector under the seat that only acts up when the seat is moved, so always wiggle-test the harness while watching live data.
Aftermarket seat covers or heavy objects left on the passenger seat can distort the sensor's reading and set this code without any failed component.
The code does not always mean the sensor itself is bad; a binding seat track or a misadjusted seat frame can produce implausible position signals.
On some vehicles, a weak battery or low charging voltage can cause the occupant detection module to log this code intermittently, so check the battery first.
Clearing the code without recalibrating the occupant detection system often leads to a repeat visit because the module retains a learned fault threshold.

Can I keep driving with B00C7?

The vehicle remains drivable, but the passenger airbag may not deploy correctly in a crash, so avoid carrying passengers in the front seat until the fault is repaired. Have the system diagnosed promptly to restore full supplemental restraint function.

Tools that help

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Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.