AutoCodes – Mercury – P1877 Mercury

P1877 Mercury Code - Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery

Quick Answer

The Transmission Control Module (TCM) monitors the Transmission Transfer Case 2-Wheel Drive Solenoid. Common causes include Faulty Transmission Transfer Case 2-Wheel Drive Solenoid, Transmission Transfer Case 2-Wheel Drive Solenoid harness is open or shorted, Transmission Transfer Case 2-Wheel Drive Solenoid 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: P1877 Mercury indicates Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery.
Common causes: Common causes include Faulty Transmission Transfer Case 2-Wheel Drive Solenoid, Transmission Transfer Case 2-Wheel Drive Solenoid harness is open or shorted, Transmission Transfer Case 2-Wheel Drive Solenoid 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 918

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 Feb 04, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1877 Mercury Description

The Transmission Control Module (TCM) monitors the Transmission Transfer Case 2-Wheel Drive Solenoid. The TCM sets the OBDII code when the Transmission Transfer Case 2-Wheel Drive Solenoid is not to factory specifications.

OBDII Code P1877 Mercury - Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery - AutoCodes.com — P1877 Mercury Code - Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery

What does this mean?

What are the Possible Causes of the DTC P1877 Mercury?

Faulty Transmission Transfer Case 2-Wheel Drive Solenoid
Transmission Transfer Case 2-Wheel Drive Solenoid harness is open or shorted
Transmission Transfer Case 2-Wheel Drive Solenoid circuit poor electrical connection

How to Fix the DTC P1877 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 P1877 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 P1877 Mercury code?

Need more information on how to fix the P1877 Mercury code? Get Access to Factory Service Manuals

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Get the P1877 Mercury 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 P1877 Mercury Code

1. What does the OBDII code P1877 mean for a Mercury vehicle?

P1877 indicates a problem with the Transmission Transfer Case 2-Wheel Drive Solenoid Circuit, specifically a short to the battery. This affects the vehicle's ability to switch between 2-wheel and 4-wheel drive.

2. What are the common symptoms of P1877 in Mercury vehicles?

Symptoms may include the inability to switch between 2WD and 4WD, the 4WD indicator light staying on or flashing, reduced fuel efficiency, and possible transmission overheating.

3. What causes the P1877 code to trigger?

The most common causes are damaged wiring, a short circuit in the solenoid circuit, a faulty 2WD solenoid, or a malfunctioning transfer case control module.

4. Can I drive my Mercury with the P1877 code?

While the vehicle may still be drivable, ignoring the issue can lead to further damage to the transfer case or transmission. It's best to address the problem as soon as possible.

5. How can I diagnose the P1877 code in my Mercury?

Start by inspecting the wiring and connectors for damage or corrosion. Use a multimeter to check for a short to the battery in the solenoid circuit. If no issues are found, test the 2WD solenoid and transfer case control module.

6. What repairs are needed to fix the P1877 code?

Repairs may involve replacing damaged wiring or connectors, repairing the short circuit, replacing the 2WD solenoid, or reprogramming or replacing the transfer case control module.

7. How much does it cost to fix the P1877 code on a Mercury?

Costs vary depending on the specific issue. Wiring repairs might cost $100-$300, while replacing the solenoid or transfer case control module could range from $300 to $1,000.

8. Can a blown fuse cause the P1877 code?

Yes, a blown fuse related to the transfer case circuit could cause the code. Check all relevant fuses before performing more complex diagnostics.

9. How can I prevent the P1877 code from recurring?

Regularly inspect and maintain the wiring and connectors for the transfer case system. Avoid driving in severe conditions that could damage the solenoid or related components.

10. Do I need special tools to fix the P1877 code on a Mercury?

You may need a multimeter, a scan tool capable of reading transmission codes, and basic automotive tools for wiring or solenoid replacement.