AutoCodes – Lincoln – C1742 Lincoln

C1742 Lincoln Code - Rear Sounder Circuit Failure

Quick Answer

The system can be disabled by the parking aid switch. Common causes include Faulty Parking Aid Speaker, Parking Aid Speaker harness is open or shorted, Parking Aid Speaker 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: C1742 Lincoln indicates Rear Sounder Circuit Failure.
Common causes: Common causes include Faulty Parking Aid Speaker, Parking Aid Speaker harness is open or shorted, Parking Aid Speaker 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.

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Code Popularity 4,436

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 19, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code C1742 Lincoln Description

The system can be disabled by the parking aid switch. A 750 Hz variable warning tone is generated from a parking aid speaker. The parking aid speaker increases the warning tone rate as the vehicle gets closer to an obstacle.

OBDII Code C1742 Lincoln - Rear Sounder Circuit Failure - AutoCodes.com — C1742 Lincoln Code - Rear Sounder Circuit Failure

What does this mean?

What are the Possible Causes of the DTC C1742 Lincoln?

Faulty Parking Aid Speaker
Parking Aid Speaker harness is open or shorted
Parking Aid Speaker circuit poor electrical connection
Faulty Parking Aid Module

How to Fix the DTC C1742 Lincoln?

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 C1742 Lincoln 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 C1742 Lincoln code?

Need more information on how to fix the C1742 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the C1742 Lincoln code diagnosed by a professional: Find a repair shop in your area

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 C1742 Lincoln Code

1. What are the common symptoms of OBDII code C1742 in a Lincoln vehicle?

- The common symptoms of OBDII code C1742 (Rear Sounder Circuit Failure) in a Lincoln vehicle include a malfunctioning rear sounder, no audible alerts or chimes, and possibly a warning light on the dashboard.

2. What are the possible causes of OBDII code C1742 in a Lincoln?

- Possible causes of OBDII code C1742 in a Lincoln include a faulty rear sounder, damaged wiring or connectors in the sounder circuit, or a malfunction in the vehicle's body control module.

3. How can I diagnose OBDII code C1742 in my Lincoln?

- Diagnosing OBDII code C1742 typically involves using an OBDII scanner to retrieve the trouble code, inspecting the rear sounder and its connections for any visible damage, and testing the circuit for continuity and proper voltage.

4. Can I continue driving my Lincoln with OBDII code C1742?

- It is generally safe to drive your Lincoln with OBDII code C1742, as this code usually pertains to the rear sounder circuit and does not affect the vehicle's drivability. However, it is recommended to address the issue promptly to ensure proper functionality of audible alerts.

5. How can I repair OBDII code C1742 in my Lincoln?

- Repairing OBDII code C1742 in a Lincoln may involve replacing the faulty rear sounder, repairing or replacing damaged wiring or connectors in the sounder circuit, or addressing any underlying issues in the body control module.

6. Are there any DIY tips for fixing OBDII code C1742 in my Lincoln?

- DIY tips for fixing OBDII code C1742 may include checking and cleaning the connections to the rear sounder, inspecting the wiring for any visible damage, and ensuring all components in the sounder circuit are securely connected.

7. Will resetting the OBDII code C1742 clear the issue in my Lincoln?

- Resetting the OBDII code C1742 may temporarily clear the warning light on the dashboard, but it will not fix the underlying issue causing the rear sounder circuit failure. It is recommended to diagnose and repair the problem to prevent the code from reoccurring.

8. Is OBDII code C1742 a common issue in Lincoln vehicles?

- OBDII code C1742 (Rear Sounder Circuit Failure) is not as common as some other OBDII codes, but it can still occur in Lincoln vehicles due to various factors such as component wear, wiring issues, or electronic malfunctions.

9. Can extreme weather conditions affect OBDII code C1742 in a Lincoln?

- Extreme weather conditions such as excessive heat or moisture can potentially impact the rear sounder circuit in a Lincoln, leading to issues that trigger OBDII code C1742. It's essential to keep the vehicle protected and well-maintained.

10. How much does it cost to repair OBDII code C1742 in a Lincoln at a professional auto repair shop?

- The cost of repairing OBDII code C1742 in a Lincoln at a professional auto repair shop can vary depending on the specific cause of the issue, labor rates, and parts required. It's advisable to obtain multiple quotes for an accurate estimate.