Circuit/System Verification

WARNING: This page is about a different car, the 2016 Cadillac ATS. However, it is still accessible from the selected car via links, so may be relevant.

Ignition ON.
Verify that DTCs P0106, P0107, P0236, P0237, P0238, P2227, P2228, P2229, P2230, P222B, P222C, P222D, or P222E are not set.
- If any of the DTCs are set
  If a DTC is set, refer to Diagnostic Trouble Code (DTC) List - Vehicle
- If none of the DTCs is set
Verify none of the conditions listed below exist:
- Loose connecting clamps, cracks, or other damage in the air intake duct system
- A damaged Q38 Throttle Body blade or shaft
- Splits, kinks, or improper connections at the vacuum hoses
- Faulty positive crankcase ventilation system operation
- Carbon deposits on the throttle blade.
- Vacuum leaks at the intake manifold, Q38 Throttle Body, Q17 Fuel Injector O-rings, and B111B Turbocharger Boost/Intake Air Temperature Sensor.
- If a condition exist
  Repair as necessary.
- If none of the conditions exist
Ignition ON.
Verify the following scan tool parameters are within range of the Altitude Versus Barometric Pressure table.
- BARO Bank 1 Sensor
- BARO Bank 2 Sensor
- MAP Sensor
- Turbocharger Boost / Intake Air Temperature Sensor
- If a sensor parameter is not within range
  Refer to the appropriate diagnostic below.
- Barometric Pressure (BARO) Sensor, Bank 1 or 2. Refer to: DTC P2227-P2230 (LGX)DTC P2227-P2230 (LF4) , or DTC P222B-P222E
- Manifold Absolute Pressure (MAP) Sensor. Refer to: DTC P0106
- Turbocharger Boost Sensor. Refer to: DTC P0236
- If all sensor parameters are within range
All OK