Occupant Classification System (OCS) Sensor Fault
The OCS is not detecting the passenger seat's weight properly.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The computer uses a weight sensor to tell if there's someone in the passenger seat. If it can't read the weight right, it won't activate the airbag in case of a crash.
What the computer is actually seeing
The power control module (PCM) receives voltage readings from the OCS sensor. A voltage below 0.5V or above 4.5V typically indicates a fault in the sensor signal.
What a healthy reading looks like
Typically, the OCS sensor should see a voltage signal between 0.5V and 4.5V; normal readings should correspond with passenger weight and position.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Inspect the wiring and connectors at the occupant classification system sensor for damage or corrosion. Repair if necessary.
- 22. Check the voltage at the OCS sensor connector while the vehicle is powered on. It should be between 0.5V and 4.5V. If not, there's a fault in the wiring or sensor.
- 33. Test the resistance of the OCS sensor according to the manufacturer specifications. If the resistance is out of spec, replace the sensor.
- 44. Clear the codes and test drive the vehicle to see if the code returns. If it does, further diagnosis of the PCM or calibration may be required.
Common causes
- Faulty OCS sensor
- Damaged wiring or connectors in the OCS circuit
- Calibration issue after seat removal or replacement
- Faulty seat module (if equipped)
Typical repair cost
$$
Related codes
Frequently asked questions
Is it safe to drive with this code active?
Yes, but the passenger airbag may be disabled, increasing the risk in a crash.
Will the code come back after repair?
If the issue is fixed correctly, it should not return. Ensure all connections are secure and the sensor is working properly.
Does this code indicate an issue with the driver's airbag?
No, this code is specific to the passenger seat and its airbag deployment.
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