Idle Mixture & Co Level
WARNING: This page does not describe the selected car, but rather 34 other vehicles, including the 2001 BMW Z8, 2001 BMW Z3, 2001 BMW X5, 2001 BMW M5, and 2001 BMW M3. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect oxygen sensor connector. Remove bolt from exhaust manifold and install CO Test Connector (13-0-090) with Adapter (13-0-100) on exhaust manifold. Connect CO meter and check idle mixture. Ensure CO level is within specification. See IDLE SPEED & CO LEVEL table.
- If CO level exceeds specification, check fuel injectors, fuel pressure and coolant temperature sensor. If CO level is less than specification, check idle speed control hoses and connections and check for air leaks. Reconnect oxygen sensor.