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Engine-Codes – Mercury – C1946 Mercury

C1946 Mercury Code - Seat Track Position Switch Circuit Open

Quick Answer

The C1946 diagnostic trouble code (DTC) for Mercury vehicles indicates that there is an open circuit detected in the seat track position switch. Common causes include Corrosion or damage to the wiring harness connected to the seat track position switch, Faulty seat track position switch, Loose or damaged electrical connectors. 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
C1946 Mercury indicates Seat Track Position Switch Circuit Open.
Common causes
Common causes include Corrosion or damage to the wiring harness connected to the seat track position switch, Faulty seat track position switch, Loose or damaged electrical connectors.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code C1946 Mercury Description

The C1946 diagnostic trouble code (DTC) for Mercury vehicles indicates that there is an open circuit detected in the seat track position switch. This switch is responsible for detecting the position of the seat in terms of its fore and aft movement. When the switch circuit is open, it means that there is a break in the electrical connection, preventing the proper operation of the seat track position sensor.

OBDII Code C1946 Mercury - Seat Track Position Switch Circuit Open
C1946 Mercury Code - Seat Track Position Switch Circuit Open

Common Causes of C1946 Mercury

  1. Corrosion or damage to the wiring harness connected to the seat track position switch.
  2. Faulty seat track position switch.
  3. Loose or damaged electrical connectors.
  4. Issues with the seat motor or mechanism.
  5. Water or moisture intrusion causing electrical issues.

Symptoms of C1946 Mercury

  1. Inability to adjust the seat position.
  2. Warning light on the dashboard related to the seat track position.
  3. Intermittent movement of the seat while driving.
  4. Unusual noises coming from the seat track mechanism.

How to Fix C1946 Mercury

  1. Begin by inspecting the wiring harness and connectors for any signs of damage or corrosion. Repair or replace any damaged components.
  2. Test the seat track position switch using a multimeter to determine if it is functioning properly. Replace the switch if necessary.
  3. Check the electrical connections to ensure they are secure and free of any debris or damage.
  4. Test the seat adjustment mechanism to verify proper operation after addressing the electrical issues.
  5. Clear the DTC from the vehicle's computer system using a diagnostic scan tool.

Cost to Fix C1946 Mercury

The cost of repairing an open circuit in the seat track position switch can vary depending on the extent of the damage and the specific components that need to be replaced. In general, the parts cost for a new seat track position switch can range from $50 to $200, while labor costs can range from $100 to $300. Overall, the total repair cost for this issue may fall between $150 and $500. It's important to note that these are rough estimates, and actual costs may vary based on factors such as location, vehicle make and model, and labor rates at the repair shop. It's recommended to consult with a professional mechanic for a more accurate cost estimate tailored to your specific situation.

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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 C1946 Mercury Code

1. What are the common symptoms of OBDII code C1946 in a Mercury related to the seat track position switch circuit?

The common symptoms include malfunctioning power seat adjustments, inability to move the seat forward or backward, and potential issues with seat memory functions.

2. What are the possible causes of the C1946 OBDII code on a Mercury?

The code C1946 typically indicates an open circuit in the seat track position switch, which can be caused by damaged wiring, a faulty switch, or a loose connection.

3. How can I diagnose the seat track position switch circuit open issue on my Mercury for code C1946?

To diagnose the problem, you can visually inspect the wiring and connectors for any damage, test the seat track position switch for continuity, and use a multimeter to check for proper voltage in the circuit.

4. Can I repair the C1946 OBDII code related to the seat track position switch circuit open in my Mercury at home?

If you have experience with automotive electrical systems and the necessary tools, you may be able to repair the issue at home by identifying and fixing the open circuit, replacing damaged components, or re-establishing proper connections.

5. Is it safe to drive my Mercury with the C1946 OBDII code triggered by the seat track position switch circuit open?

It is not recommended to drive the vehicle with the C1946 code active, as it may lead to further damage or safety concerns due to the impaired functionality of the power seat adjustments.

6. How much does it typically cost to repair the C1946 OBDII code issue on a Mercury at a professional repair shop?

The cost of repairing the C1946 code can vary depending on the extent of the problem, the labor rates of the repair shop, and the cost of any replacement parts needed. It is advisable to obtain quotes from different shops for an accurate estimate.

7. Can resetting the OBDII system clear the C1946 code related to the seat track position switch circuit open in my Mercury?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing the open circuit is not addressed, the code is likely to reappear once the system detects the problem again.

8. Are there any preventive maintenance tips to avoid encountering the C1946 OBDII code in my Mercury in the future?

To prevent the C1946 code from reoccurring, you can periodically inspect the seat track position switch and associated wiring for any signs of wear or damage, and address any issues promptly to maintain proper functionality.

9. Can a faulty seat track position switch in a Mercury trigger additional OBDII codes besides C1946 related to the circuit open?

Yes, a faulty seat track position switch can lead to the triggering of other OBDII codes related to seat position sensors, power seat controls, or electrical circuitry, depending on the specific issue detected by the vehicle's diagnostic system.

10. How long does it typically take to repair the C1946 OBDII code issue concerning the seat track position switch circuit open in a Mercury?

The repair time for the C1946 code can vary based on the complexity of the problem, the availability of replacement parts, and the expertise of the technician. Generally, it can take anywhere from a few hours to a full day to diagnose and fix the issue.

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