AutoCodes – Ford – P1874 Ford

P1874 Ford Code - Transfer Case Hall Effect Sensor Power Circuit Failure

Quick Answer

The Mode Select Switch (MSS) communicates the operator's choice to the Transfer Case Control Module (TCCM). Common causes include Faulty Transfer Case Control Module (TCCM), Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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: P1874 Ford indicates Transfer Case Hall Effect Sensor Power Circuit Failure.
Common causes: Common causes include Faulty Transfer Case Control Module (TCCM), Transfer Case Control Module harness is open or shorted, Transfer Case Control Module 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 14,121

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 Aug 15, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P1874 Ford Description

The Mode Select Switch (MSS) communicates the operator's choice to the Transfer Case Control Module (TCCM). As the TCCM commands the gearmotor encoder assembly to 4H mode, the transfer case shift fork moves to engage 4H mode which also engages the dual-cone synchronizers to bring the front driveline to the same speed as the rear driveline. The TCCM also activates the hublock vacuum solenoid, providing a vacuum and engaging the Constant Vacuum Hublock (CVH) at each front wheel. If the vehicle is not responding to the operator's intentions, systematically check the necessary inputs and outputs of the TCCM, components of the transfer case, CVH components, and axle shafts. Check all circuits for opens and shorts to power or ground.

OBDII Code P1874 Ford - Transfer Case Hall Effect Sensor Power Circuit Failure - AutoCodes.com — P1874 Ford Code - Transfer Case Hall Effect Sensor Power Circuit Failure

What does this mean?

What are the Possible Causes of the DTC P1874 Ford?

Faulty Transfer Case Control Module (TCCM)
Transfer Case Control Module harness is open or shorted
Transfer Case Control Module circuit poor electrical connection
Faulty Transfer case
Faulty Front axle assembly

How to Fix the DTC P1874 Ford?

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 P1874 Ford 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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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 P1874 Ford Code

1. What are the common symptoms of OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure?

- Common symptoms include difficulty shifting gears, illuminated check engine light, harsh shifting, and reduced fuel efficiency.

2. What can cause the OBDII code P1874 Ford to trigger the Transfer Case Hall Effect Sensor Power Circuit Failure?

- The code can be triggered by a faulty transfer case hall effect sensor, damaged wiring or connectors, or a malfunctioning transfer case control module.

3. How serious is the OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure?

- This code should be addressed promptly as it can lead to drivability issues and potential damage to the transfer case if left unrepaired.

4. Can I continue driving my vehicle with the OBDII code P1874 Ford active?

- It is not recommended to drive with this code active, as it can result in poor performance and potentially cause further damage to the transfer case.

5. How is the OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure diagnosed?

- The code is diagnosed using a scan tool to retrieve the fault codes and further testing of the transfer case hall effect sensor and related components.

6. What are some repair tips for fixing the OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure?

- Repair tips include checking and repairing any damaged wiring or connectors, replacing the transfer case hall effect sensor if faulty, and ensuring proper connection to the control module.

7. Can I reset the OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure without fixing the underlying issue?

- While you can clear the code using a scan tool, it is essential to address the root cause of the issue to prevent it from recurring and potentially causing further damage.

8. Is it possible to prevent the OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure from occurring?

- Regular maintenance and inspection of the transfer case components can help prevent this code from occurring by catching any issues early on.

9. How long does it typically take to repair the OBDII code P1874 Ford related to the Transfer Case Hall Effect Sensor Power Circuit Failure?

- The repair time can vary depending on the exact cause of the issue, but it may take anywhere from a few hours to a day for the repairs to be completed.

10. Are there any recalls or technical service bulletins related to the OBDII code P1874 Ford Transfer Case Hall Effect Sensor Power Circuit Failure?

- It is advisable to check with a Ford dealership or visit the NHTSA website to see if there are any relevant recalls or technical service bulletins related to this specific OBDII code.