B1BB4 Code - Passenger Air Bag Disable Switch Circuit High
Quick Answer
When the ignition is on, the Passenger Airbag MUX Switch Sense circuit supplies a 3 to 10 ms pulse every 100 ms across the On or Off switch resister to the Passenger Airbag MUX switch return circuit. Common causes include Faulty Passenger Air Bag Disable Switch, Passenger Air Bag Disable Switch harness is open or shorted, Passenger Air Bag Disable Switch 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
- B1BB4 indicates Passenger Air Bag Disable Switch Circuit High.
- Common causes
- Common causes include Faulty Passenger Air Bag Disable Switch, Passenger Air Bag Disable Switch harness is open or shorted, Passenger Air Bag Disable Switch 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.
Code B1BB4 Description
What are the Possible Causes of the DTC B1BB4?
- Faulty Passenger Air Bag Disable Switch
- Passenger Air Bag Disable Switch harness is open or shorted
- Passenger Air Bag Disable Switch circuit poor electrical connection
- Faulty Occupant Restraint Controller (ORC)
How to Fix the DTC B1BB4?
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 is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1BB4 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.
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Information for Specific Makes
- B1BB4 Chrysler — Passenger Air Bag Disable Switch Circuit High
- B1BB4 Dodge — Passenger Air Bag Disable Switch Circuit High
- B1BB4 Jeep — Passenger Air Bag Disable Switch Circuit High
- B1BB4 Mitsubishi — Passenger Air Bag Disable Switch Circuit High
- B1BB4 RAM — Passenger Air Bag Disable Switch Circuit High
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.
Frequently Asked Questions about B1BB4 Code
1. What does the OBDII code B1BB4 mean?
The code B1BB4 indicates a problem with the Passenger Air Bag Disable (PABD) switch circuit, specifically that the circuit is reading a high voltage condition.
2. What are the common symptoms of the B1BB4 code?
Common symptoms include the airbag warning light staying on, the passenger airbag failing to disable when the switch is turned off, or a non-functional passenger airbag system.
3. What causes the B1BB4 code to appear?
Possible causes include a faulty PABD switch, damaged or corroded wiring, loose electrical connections, or a malfunctioning airbag control module.
4. Can I still drive my car with the B1BB4 code active?
While the vehicle may still be drivable, the passenger airbag system may not function properly, posing a safety risk in the event of an accident.
5. How do I diagnose the B1BB4 code?
Start by using an OBDII scanner to confirm the code, then inspect the PABD switch, wiring, and connectors for visible damage or corrosion. Testing the circuit with a multimeter can help pinpoint the issue.
6. How is the B1BB4 code typically fixed?
Repairs may involve replacing the PABD switch, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming or replacing the airbag control module.
7. How much does it cost to fix the B1BB4 code?
Repair costs may vary, but replacing the PABD switch typically costs $100-$300, while more extensive repairs like control module replacement can cost $500 or more.
8. Can a blown fuse cause the B1BB4 code?
Yes, a blown fuse in the airbag circuit can cause voltage irregularities that trigger this code. Check the fuses related to the airbag system as part of your diagnosis.
9. Will clearing the B1BB4 code with a scanner fix the issue?
Clearing the code may temporarily reset the warning light, but the underlying problem must be fixed to prevent the code from returning.
10. Is the B1BB4 code specific to certain vehicles?
The B1BB4 code is most commonly seen in Chrysler, Dodge, and Jeep vehicles, but it may appear in other makes with similar passenger airbag systems.
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