P0106 GMC Terrain
MAP/BARO Pressure Sensor Range/Performance · Powertrain Code · Medium · Repair: Easy
What is P0106?
The manifold absolute pressure sensor is reading outside expected parameters.
When the GMC Terrain triggers code P0106 (map/baro pressure sensor range/performance), it typically points to an issue in the powertrain system. Below you'll find the most common causes, symptoms, and repair options specific to the GMC Terrain.
This repair is rated easy, meaning basic tools, no lift needed.
Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your GMC Terrain.
Common Causes on GMC Terrain
- Failed MAP sensor (common on turbocharged 1.5T LYX/L3B and 2.0T LSY engines)
- Vacuum hose to MAP sensor cracked or disconnected
- Intake manifold gasket leak affecting MAP sensor readings
- Wiring issue or corroded connector at MAP sensor
Symptoms
- Check Engine Light on
- Rough idle
- Poor acceleration and hesitation
- Engine may surge at idle
- Incorrect fuel trim readings
Notes for GMC Terrain
On GM turbo 4-cylinder engines, always verify boost pressure readings with a scan tool after replacing the MAP sensor to confirm the fix.