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B1942 Mercury Code - Left Front Impact Sensor Fee/Return Circuit Open

- Code Popularity: 488 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC B1942 Mercury?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Left Front Air Bag Crash Sensor
  • Left Front Air Bag Crash Sensor harness is open or shorted
  • Left Front Air Bag Crash Sensor circuit poor electrical connection
  • Faulty Air Bag Diagnostic Monitor
⚠ Does your Mercury have Safety Recalls? → Check here

How to Fix the DTC B1942 Mercury?

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

Search for B1942 Mercury Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1942 Mercury code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

What are Code Possible Symptoms?

  • Air Bag Warning Light ON

Code B1942 Mercury Description

The voltage at the terminal is set by Air Bag Diagnostic Monitor to be slightly less than the battery voltage. This circuit is connected to the circuit inside the left front impact sensor. The voltage at the circuit and diagnostic monitor should be the same as the voltage at the diagnostic monitor circuit. The air bag diagnostic monitor periodically pulls voltage low to verify the connection to the terminal. If the voltage at circuit does not pull low as a result of the test, the Diagnostic Trouble Code (DTC) B1941 will be stored in memory and AIR BAG warning light will flash. If the condition is repaired or corrected, DTC B1941 will be stored in memory.

OBDII Code B1942 Mercury - Left Front Impact Sensor Fee/Return Circuit Open - AutoCodes.com
B1942 Mercury Code - Left Front Impact Sensor Fee/Return Circuit Open

Need More Information on the Code?

Need more information on how to fix the B1942 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1942 Mercury 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.

Code B1942 Mercury comments

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