AutoCodes – Cadillac – B0074 Cadillac

B0074 Cadillac Code - Passenger Occupant Classification Sensor

Quick Answer

The Passenger Presence System (PPS) uses a silicone filled sensor pad located underneath the passenger seat foam cushion and is connected by a hose clamp to a pressure sensor. Common causes include Faulty Passenger Occupant Classification Sensor, Passenger Occupant Classification Sensor harness is open or shorted, Passenger Occupant Classification Sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B0074 Cadillac indicates Passenger Occupant Classification Sensor.
Common causes: Common causes include Faulty Passenger Occupant Classification Sensor, Passenger Occupant Classification Sensor harness is open or shorted, Passenger Occupant Classification Sensor circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 3,009

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0074 Cadillac Description

The Passenger Presence System (PPS) uses a silicone filled sensor pad located underneath the passenger seat foam cushion and is connected by a hose clamp to a pressure sensor. The weight of the occupant sitting in the front passenger seat is measured as a pressure change within the bladder by the pressure sensor. The pressure sensor is a 3-wire sensor consisting of a power, ground, and signal circuit. The PPS continually monitors itself and if a fault in this circuit occurs, a Diagnostic Trouble Code (DTC) will set. When the Sensing and Diagnostic Module (SDM) detects this DTC within the PPS, it will notify the customer of the enable/disable status by turning ON the OFF indicator on the PASSENGER AIR BAG ON/OFF indicators. Then the PPS will communicate to the SDM through serial data communications that a PPS fault is present. The SDM will then suppress the deployment of the Instrument Panel (I/P) module and then turn the AIR BAG indicator ON.

OBDII Code B0074 Cadillac - Passenger Occupant Classification Sensor - AutoCodes.com — B0074 Cadillac Code - Passenger Occupant Classification Sensor

What does this mean?

What are the Possible Causes of the DTC B0074 Cadillac?

Faulty Passenger Occupant Classification Sensor
Passenger Occupant Classification Sensor harness is open or shorted
Passenger Occupant Classification Sensor circuit poor electrical connection
Faulty Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0074 Cadillac?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

DTC B0074 03 Passenger Occupant Classification Sensor Circuit Voltage Below Threshold
DTC B0074 07 Passenger Occupant Classification Circuit Voltage Above Threshold
DTC B0074 08 Passenger Occupant Classification Circuit Signal Invalid

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0074 Cadillac code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B0074 Cadillac code?

Need more information on how to fix the B0074 Cadillac code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0074 Cadillac code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B0074 Cadillac Code

1. What are the common symptoms associated with OBDII code B0074 in a Cadillac related to the Passenger Occupant Classification Sensor?

The common symptoms include the airbag warning light staying illuminated, the passenger airbag system being disabled, and potential issues with the airbag deployment during an accident.

2. What are the possible causes of OBDII code B0074 in a Cadillac related to the Passenger Occupant Classification Sensor?

The code B0074 in a Cadillac typically indicates a fault with the Passenger Occupant Classification System, which can be caused by a malfunctioning sensor, wiring issues, or a faulty module.

3. How can I diagnose the issue behind OBDII code B0074 in a Cadillac related to the Passenger Occupant Classification Sensor?

Diagnosing the problem involves using a diagnostic scanner to retrieve the specific fault code, inspecting the wiring and connections of the sensor, and testing the sensor's functionality to determine if it needs replacement.

4. Are there any safety concerns associated with OBDII code B0074 in a Cadillac related to the Passenger Occupant Classification Sensor?

Yes, driving with the airbag system disabled due to this code can pose a safety risk, as the passenger airbag may not deploy correctly in the event of a collision, potentially leading to increased injury to the occupant.

5. Can I repair OBDII code B0074 in a Cadillac related to the Passenger Occupant Classification Sensor myself?

While some simple fixes like checking connections and wiring can be done by DIY enthusiasts, diagnosing and repairing issues with the Passenger Occupant Classification System often require specialized tools and expertise, so it's recommended to consult a professional mechanic.

6. How much does it typically cost to repair OBDII code B0074 in a Cadillac related to the Passenger Occupant Classification Sensor?

The cost of repairing this issue can vary depending on the exact cause of the fault, but it may range from $200 to $500 or more, including parts and labor.

7. Is it safe to drive my Cadillac with OBDII code B0074 related to the Passenger Occupant Classification Sensor?

It is not recommended to drive the vehicle with unresolved airbag system issues, as the airbags may not deploy properly in case of an accident, increasing the risk of injury to the occupants.

8. Can I reset the OBDII code B0074 related to the Passenger Occupant Classification Sensor in my Cadillac using an OBDII scanner?

Resetting the code without addressing the underlying issue will not solve the problem. It's important to diagnose the root cause of the fault and perform the necessary repairs to ensure the airbag system functions correctly.

9. How long does it typically take to repair OBDII code B0074 related to the Passenger Occupant Classification Sensor in a Cadillac?

The repair time can vary based on the complexity of the issue and the availability of parts. In general, it may take a few hours to a full day for a mechanic to diagnose and repair the problem.

10. Are there any recalls or technical service bulletins related to OBDII code B0074 in Cadillacs with Passenger Occupant Classification Sensor issues?

It's advisable to check with a Cadillac dealership or visit the National Highway Traffic Safety Administration (NHTSA) website to see if there are any relevant recalls or technical service bulletins addressing this specific OBDII code and related concerns.