P1876 on 2018-2022 GMC Terrain (SL, SLE, SLT, Denali) — Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure
1 vehicles · 1 makes · $150-$1,500 repair
How to diagnose and fix P1876: most-reported vehicles
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GMC Terrain · 2018–2022
Second-generation Terrains with the electronic precision (push-button/monostable) shifter throw a persistent "Shift to Park" warning and refuse to shift out of (or fully into) park even when correctly positioned. GM traced it to build-up/contamination on the Park switch contacts in the transmission control (shifter) assembly, causing high resistance so the BCM cannot electronically confirm the Park position. It can strand the vehicle and, in many cases, keeps the ignition from turning off (stuck in Accessory).
Common Symptoms
- "Shift to Park" message won't clear
- Cannot shift out of park
- Cannot turn engine off (stuck in Accessory)
- Intermittent no-shift condition
- Warning chime persists
How to Fix
GM issued field actions ranging from an ECM/BCM software update to a shifter wire-harness/jumper change and ultimately replacement of the shifter control (transmission control button) assembly. Dealers first clear the fault; recurring cases get a new shifter cartridge or full center-console shifter unit.
Sources for this issue (1)
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P1876 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P1876 mean?
P1876 stands for "Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure." A Ford manufacturer-specific powertrain code. The PCM or transfer case control module detected an electrical fault — open, short, or out-of-range resistance — in the circuit for the electric-shift transfer case 2WD solenoid, which is mounted on the transfer case and engages or disengages 4WD when the dash selector is turned. The system typically defaults to a fail-safe state with a Service 4WD or 4x4 light on, and the transfer case may refuse to shift out of its current range. The vehicle still drives.
What are the most common causes of P1876?
The most common causes of P1876 are: Failed transfer case 2WD shift solenoid / electric shift motor assembly, Damaged, chafed, or corroded wiring and connectors at the transfer case (exposed under the vehicle), Corroded or failed 4x4 shift motor relays — an inexpensive item worth testing before the motor, Poor ground or high resistance in the transfer case control circuit, Failed transfer case control module or PCM driver circuit, Internal mechanical binding in the transfer case preventing the shift from completing. The specific cause varies by vehicle.
How much does it cost to fix P1876?
Repair costs for P1876 range from $150 to $1,500, depending on the vehicle and root cause.
Which vehicles are affected by P1876?
Au7o has documented P1876 across 1 vehicle models from 1 manufacturers: GMC.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.