Visual/Physical Check
- Ensure that the control module grounds are clean, tight and correctly located. Refer to Power and Grounding Component Views .
- Ensure that the vacuum hoses are not split, kinked and properly connected, as shown on the Vehicle Emission Control Information label. Refer to Emission Hose Routing Diagram. Refer to Evaporative Emissions Hose Routing Diagram .
- Ensure that the air filter is clean and free from restrictions.
- Ensure that there is no water intrusion in connectors terminals and components.
- Inspect the air intake ducts for the following conditions:
- Collapsed
- Damaged areas
- Looseness
- Incorrect installation
- Leaking
- Inspect for air leaks at the throttle body mounting area, the mass air flow (MAF) sensor and intake manifold sealing surfaces.
- Inspect the wiring harness for the following conditions:
- Poor connections
- Pinches
- Cuts
- Inspect for loose, damaged, unseated or missing sensors/components.
- Inspect the terminals for corrosion and correct contact.