B1999 Mercury Code - Passenger Side Side Mount Airbag Low Resistance On Squib
Quick Answer
The Restraints Control Module (RCM) monitors the Passenger Side Side Mount Airbag. Common causes include Faulty Passenger Side Side Mount Airbag, Passenger Side Side Mount Airbag harness is open or shorted, Passenger Side Side Mount Airbag 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
- B1999 Mercury indicates Passenger Side Side Mount Airbag Low Resistance On Squib.
- Common causes
- Common causes include Faulty Passenger Side Side Mount Airbag, Passenger Side Side Mount Airbag harness is open or shorted, Passenger Side Side Mount Airbag 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 B1999 Mercury Description
What are the Possible Causes of the DTC B1999 Mercury?
- Faulty Passenger Side Side Mount Airbag
- Passenger Side Side Mount Airbag harness is open or shorted
- Passenger Side Side Mount Airbag circuit poor electrical connection
- Faulty Restraints Control Module (RCM)
How to Fix the DTC B1999 Mercury?
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 B1999 Mercury 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 B1999 Mercury code?
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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 B1999 Mercury Code
1. What does OBDII code B1999 mean on a Mercury?
Code B1999 indicates a "Passenger Side Side Mount Airbag Low Resistance on Squib," meaning there’s an issue with the airbag electrical circuit on the passenger side.
2. What are the common symptoms of code B1999 in a Mercury?
Symptoms include an illuminated airbag warning light on the dashboard and the potential for the passenger side airbag not deploying during a collision.
3. What causes code B1999 on a Mercury vehicle?
Common causes include damaged wiring, corroded connectors, a faulty airbag module, or a malfunctioning airbag squib.
4. Is it safe to drive with code B1999 active?
It is not recommended to drive with this code active, as the passenger side airbag may not function properly in an accident, compromising safety.
5. How do you diagnose code B1999 on a Mercury?
Diagnosis involves using an OBDII scanner to confirm the code, visually inspecting wiring and connectors, and testing resistance in the airbag circuit.
6. Can a loose connection cause code B1999?
Yes, a loose or corroded connector in the airbag circuit can create low resistance and trigger the B1999 code.
7. How do you fix code B1999 on a Mercury?
Repairs may include cleaning or replacing corroded connectors, repairing damaged wiring, or replacing the passenger side airbag or module.
8. What tools are needed to repair code B1999?
You’ll need an OBDII scanner, a multimeter to test resistance, and potentially airbag system-specific tools for proper repairs.
9. Will disconnecting the battery reset code B1999?
Disconnecting the battery may temporarily clear the code, but the underlying issue must be fixed to prevent the code from returning.
10. How much does it cost to repair code B1999 on a Mercury?
Repair costs vary depending on the issue but can range from $50 for simple wiring fixes to over $1,000 if the airbag module or squib needs replacement.
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