AutoFixDB - Free OBD-II diagnostic trouble code lookup. Find causes, symptoms, diagnostic steps and repair solutions.

Overview

B00C7 diagnostic trouble code indicates a fault with the passenger seat occupant position sensor A used by the Occupant Classification System (OCS) to determine passenger presence/weight for proper airbag deployment.

Common Symptoms

Airbag/SRS warning light illuminated
Passenger airbag status incorrect or disabled
Seat occupancy system fault message displayed

Most Common Causes

Faulty passenger seat occupant position sensor high

Sensor may be defective or out of specification.

Open or short in sensor harness or connector medium

Wiring issues between sensor and airbag control module can cause the code.

Poor electrical connection at sensor circuit medium

Corrosion, loose pins, or contact resistance can trigger this code.

Faulty airbag control module (ACU/SRM) low

Less common but possible if sensor and wiring check good.

Diagnostic Steps

Retrieve full freeze frame data and confirm B00C7 is present

Expected: B00C7 code logged in body control/airbag module

Interpretation: Confirmed relevant sensor/system fault.
Perform visual inspection of passenger seat wiring and connectors

Expected: No damaged wires, corrosion, or loose connections

Interpretation: If issues found, repair and retest. If not, continue.
Measure sensor circuit resistance/continuity with a multimeter

Expected: Circuit resistance within specification

Interpretation: Open or short indicates wiring/sensor fault depending on location.
Replace or test the passenger seat occupant position sensor

Expected: Sensor parameters within expected range

Interpretation: Failure indicates sensor replacement is needed.
If still unresolved, test/replace airbag control module

Expected: No code after replacement

Interpretation: Validates if module was root cause.

Repair Solutions

Repair or replace passenger seat occupant position sensor medium

Estimated Cost: $150 - $500

Cost depends on vehicle model and labor; includes sensor and potential seat mat replacement.

Repair wiring harness/connectors medium

Estimated Cost: $50 - $300

Repairing damaged wiring or connectors can resolve intermittent faults.

Replace airbag control module (if faulty) hard

Estimated Cost: $500 - $1200

Airbag module replacement requires calibration and potentially dealer-level tools.

Common Misdiagnoses

Avoid these common diagnostic mistakes:

Air conditioning sensor fault (incorrect attribution)
General body control module fault without inspecting seat OCS

Frequently Asked Questions

Can you explain the meaning of B00C7?

Passenger Seat Occupant Position Sensor A (Subfault) is the standard definition for B00C7. This diagnostic code is triggered when the ECU detects a problem in the Sensors.

Reflecting on severity: How bad is B00C7?

The B00C7 code is considered medium severity. May trigger airbag/SRS warning light; does not typically affect engine performance but affects supplemental restraint system functionality.

What happens when the B00C7 code is active?

Common symptoms include: Airbag/SRS warning light illuminated, Passenger airbag status incorrect or disabled, Seat occupancy system fault message displayed. You might also notice the Check Engine Light is on.

What causes the B00C7 code?

Potential culprits include: Faulty passenger seat occupant position sensor, Open or short in sensor harness or connector, Poor electrical connection at sensor circuit. A proper diagnosis is recommended.

Estimated repair costs for different causes of B00C7

Expect to pay around $300 if the issue is a Repair wiring harness/connectors, but up to $1200 if the Replace airbag control module (if faulty) needs replacement.

Does code B00C7 apply to BMW vehicles?

Yes, B00C7 is a generic code that applies to all OBD-II compliant vehicles, including Ford, Toyota, Honda, Chevrolet, Nissan, Dodge, BMW, and more.

B00C7: Passenger Seat Occupant Position Sensor A (Subfault)