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
Most Reported On
P1876 is an OBD-II diagnostic trouble code meaning “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. This code is most commonly reported on 2018-2022 GMC Terrain (SL, SLE, SLT, Denali), with repair costs ranging from $150 to $1,500.
Common Causes
Typical Repair Cost
Based on 1 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
P1876 does not use the standard P/B/C/U prefix. It may be a manufacturer-specific code, so verify that a scanner supports your exact year, model and module before buying.
FAQ
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.