B1945 Mercury Code - Left Front Impact Sensor Not Mounted To Vehicle Properly/Ground Circuit Open
Quick Answer
The Air Bag Diagnostic Monitor measures resistance between circuit and reference ground. Common causes include Faulty Left Front Impact Sensor, Left Front Impact Sensor harness is open or shorted, Left Front Impact 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
- B1945 Mercury indicates Left Front Impact Sensor Not Mounted To Vehicle Properly/Ground Circuit Open.
- Common causes
- Common causes include Faulty Left Front Impact Sensor, Left Front Impact Sensor harness is open or shorted, Left Front Impact 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.
Code B1945 Mercury Description
What are the Possible Causes of the DTC B1945 Mercury?
- Faulty Left Front Impact Sensor
- Left Front Impact Sensor harness is open or shorted
- Left Front Impact Sensor circuit poor electrical connection
- Faulty Air Bag Diagnostic Monitor
How to Fix the DTC B1945 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 B1945 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.
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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 B1945 Mercury Code
1. What are the common symptoms of OBDII code B1945 in a Mercury related to the left front impact sensor?
The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the airbag system's functionality.
2. What could cause the OBDII code B1945 in a Mercury indicating the left front impact sensor is not mounted properly or the ground circuit is open?
Possible causes include a loose or improperly mounted left front impact sensor, damaged wiring or connectors, or a faulty impact sensor itself.
3. How can I diagnose the issue related to OBDII code B1945 in my Mercury?
Diagnosing the issue involves inspecting the left front impact sensor for proper mounting, checking the wiring and connectors for any damage, and using a multimeter to test the continuity of the ground circuit.
4. Can I drive my Mercury with the OBDII code B1945 present?
It is not recommended to drive the vehicle with this code active, as it indicates a potential problem with the airbag system, which could affect its performance in the event of a collision.
5. What are the repair options for fixing OBDII code B1945 in a Mercury?
Repair options may include properly mounting the left front impact sensor, repairing or replacing damaged wiring or connectors, and ensuring a good ground connection for the sensor.
6. Is it safe to repair OBDII code B1945 in a Mercury on my own?
If you have experience with automotive electrical systems and airbag components, you may be able to address this issue on your own. However, it is recommended to consult a professional mechanic to ensure proper diagnosis and repair.
7. Can resetting the OBDII code B1945 in my Mercury make the problem go away?
Resetting the code may temporarily turn off the warning light, but it will not fix the underlying issue causing the code to appear. It is essential to address the root cause of the problem for a permanent solution.
8. How much does it typically cost to repair OBDII code B1945 in a Mercury at a repair shop?
The cost of repairing this code can vary depending on the specific issue causing it. It is best to consult a mechanic for an accurate diagnosis and cost estimate.
9. Will OBDII code B1945 in a Mercury affect the vehicle's overall safety?
Yes, this code indicates a potential problem with the airbag system, which is a critical safety feature. It is essential to address this issue promptly to ensure the proper functioning of the airbags in case of an accident.
10. How long does it usually take to repair OBDII code B1945 in a Mercury?
The repair time can vary depending on the exact cause of the issue and the complexity of the repair. Some fixes may be quick, while others may require more time for diagnosis and repair.
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