Circuit/System Verification
- If DTCs P0107, P0108, P012B, P012C, P012D, P0641, P0651 or P2227, P2228, P2229 are also set, refer to Diagnostic Trouble Code (DTC) List - Vehicle for further information.
- The harness connectors for the following sensors are the same configuration but are not interchangeable.
- Review the engine controls schematics for the BARO sensor and for the SCIAP sensor and note the circuit colors.
- Inspect the wiring harness of the BARO sensor for the proper connections.
- Inspect the wiring harness of the SCIAP sensor for the proper connections.
- Ignition ON, observe the scan tool SC Inlet Pressure Sensor and BARO Sensor parameters. Verify the SC Inlet Pressure and BARO sensor parameters are within 5 kPa of each other.
- Ignition ON, observe the scan tool SC Inlet Pressure Sensor kPa parameter. Start the engine. The SC Inlet Pressure Sensor kPa parameter should decrease.
- Engine running, observe and record the SC Inlet Pressure Sensor parameter kPa value with a scan tool. The SC Inlet Pressure Sensor parameter should decrease.
- Verify the integrity of the SCIAP and BARO sensors by inspecting for the following conditions:
- Damaged components
- Loose or improper installation
- An air flow restriction
- A cracked or restricted SCIAP sensor vacuum hose
- An intake manifold leak
IMPORTANT:
IMPORTANT:
The Altitude vs. Barometric Pressure table indicates a pressure range for a given altitude under normal weather conditions. Weather conditions consisting of very low or very high pressure and/or very low or very high temperature may cause a reading to be slightly out of range.