AutoCodes – Mercury – P1830 Mercury

P1830 Mercury Code - Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery

Quick Answer

The transfer case is equipped with an electromagnetic clutch which is located inside the case. Common causes include Faulty Generic Electronic Module (GEM), Generic Electronic Module (GEM) harness is open or shorted, Generic Electronic Module (GEM) 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: P1830 Mercury indicates Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery.
Common causes: Common causes include Faulty Generic Electronic Module (GEM), Generic Electronic Module (GEM) harness is open or shorted, Generic Electronic Module (GEM) 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 1,581

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 Sep 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P1830 Mercury Description

The transfer case is equipped with an electromagnetic clutch which is located inside the case. This clutch is used to spin up the front driveline when shifting from 2WD to 4H mode at speed. When the control switch on the instrument panel is turned, the Generic Electronic Module (GEM) recognizes that a shift has been requested and activates the electromagnetic clutch and the relays which power the transfer case shift motor. When the shift motor reaches the desired position, as determined by the contact plate position inputs to the GEM, power to the shift relays and motors will be removed. When the transfer case front and rear output shafts are synchronized, the spring loaded lockup collar mechanically engages the mainshaft hub to the drive sprocket.Finally, the front axle collar is engaged and the electromagnetic clutch is deactivated. The transfer case clutch relay is an electromechanical relay used to activate the transfer case clutch within the transfer case.

OBDII Code P1830 Mercury - Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery - AutoCodes.com — P1830 Mercury Code - Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Battery

What does this mean?

What are the Possible Causes of the DTC P1830 Mercury?

Faulty Generic Electronic Module (GEM)
Generic Electronic Module (GEM) harness is open or shorted
Generic Electronic Module (GEM) circuit poor electrical connection

How to Fix the DTC P1830 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 P1830 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.

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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.