The automobile fault code P1861 indicates a problem with the Transfer Case Control Module (TCCM). The most common symptom is the Engine Light being ON or the Service Engine Soon Warning Light.
The cause of this fault code can be a faulty TCCM, an open or shorted TCCM harness, a poor electrical connection in the TCCM circuit, or a faulty transfer case or front axle assembly. To fix this issue, you should visually inspect the wiring harness and connectors, checking for any damage or corrosion. Additionally, look for any broken, bent, pushed out, or corroded pins in the connectors.
The repair time for this issue is estimated to be around 1.0 hour.
Repair Importance Level | 10.0 (Out of 10) |
Estimated Repair Time | Approximately 1.0 hour |
Repair Difficulty Level | 10.0 (Out of 10) |
Unveiling The Symptoms Of Fault Code P1861: A Comprehensive Guide
When the engine light is on or the service engine soon warning light is illuminated, it could be a sign of the p1861 fault code.
- The symptoms of the automobile fault code P1861 include the Engine Light being ON or the Service Engine Soon Warning Light being illuminated.
Unveiling The Culprits: Code P1861 Possible Causes Revealed!
The automobile fault code P1861 can be caused by a faulty Transfer Case Control Module (TCCM), an open or shorted TCCM harness, a poor electrical connection in the TCCM circuit, a faulty transfer case, or a faulty front axle assembly.
- The fault code P1861 can be caused by a faulty Transfer Case Control Module (TCCM), an open or shorted harness in the Transfer Case Control Module, a poor electrical connection in the Transfer Case Control Module circuit, a faulty Transfer case, or a faulty Front axle assembly.
Fixing Code P1861: Simple Steps To Resolve The Issue
To fix the automobile fault code p1861, start by visually inspecting the wiring harness, connectors, and components for any damage or corrosion.
- To fix the automobile fault code P1861, follow these steps: 1.
- Check the possible causes mentioned above.
- 2.
- Visually inspect the wiring harness and connectors related to the fault code.
- 3.
- Look for any damaged components.
- 4.
- Check for broken, bent, pushed out, or corroded pins in the connectors.
- 5.
- Repair time estimation: 1.0 hour.
Cracking The Code: P1861 – Cost And Complexity Unveiled!
The factors influencing the cost of diagnosing and fixing the automobile fault code P1861 are the estimated repair time of 1.0 hour and the typical hourly rate charged by auto repair shops, which ranges between $75 and $150.
P1861: Unveiling The Mystery Behind This Automobile Fault Code
The P1861 fault code indicates a short circuit to ground in the transfer case contact plate ‘D’. This contact plate is responsible for communicating the operator’s choice to the Transfer Case Control Module (TCCM). When the TCCM commands the gearmotor encoder assembly to 4H mode, the transfer case shift fork engages 4H mode and activates the dual-cone synchronizers to synchronize the front and rear drivelines.
Additionally, the hublock vacuum solenoid engages the Constant Vacuum Hublock (CVH) at each front wheel. If your vehicle is not responding as intended, it is important to systematically check the necessary inputs and outputs of the TCCM, components of the transfer case, CVH components, and axle shafts. It is recommended to inspect all circuits for any opens or shorts to power or ground.
By identifying and addressing the short circuit issue in the transfer case contact plate ‘D’, you can ensure proper communication between the operator and the TCCM, allowing for smooth engagement of the desired mode.
FAQ
If you’re seeing the engine light on or the service engine soon warning light, the fault code P1861 could be the culprit. This code is often caused by a faulty Transfer Case Control Module (TCCM), an open or shorted TCCM harness, a poor electrical connection in the TCCM circuit, a faulty transfer case, or a faulty front axle assembly. To visually inspect these possible causes, check the related wiring harness and connectors for any damage. Look out for broken, bent, pushed out, or corroded pins in the connectors.
If you find your engine light or service engine soon warning light illuminated, it could be due to a faulty Transfer Case Control Module (TCCM). Other possible causes include an open or shorted TCCM harness, poor electrical connection in the TCCM circuit, a faulty transfer case, or a faulty front axle assembly. To fix this issue, start by visually inspecting the wiring harness and connectors. Look for any damaged components and check for broken, bent, pushed out, or corroded connector pins.
If you suspect that the Transfer Case Control Module harness is open or shorted, and you’re experiencing the symptom of the Engine Light being ON, there are a few steps you can take. First, visually inspect the related wiring harness and connectors for any damage. Look for broken, bent, pushed out, or corroded connector pins. This will help you check for any poor electrical connections. Additionally, make sure to check the possible causes listed above, including a faulty Transfer Case Control Module or a faulty Front axle assembly.

Wrap Up
If you’re seeing the Engine Light ON or the Service Engine Soon Warning Light, it could be due to a faulty Transfer Case Control Module (TCCM), an open or shorted TCCM harness, a poor electrical connection in the TCCM circuit, or even a faulty transfer case or front axle assembly. To fix this, visually inspect the wiring harness and connectors, check for damaged components, and look for any broken, bent, pushed out, or corroded connector pins.