Monday, April 15, 2013
2003 BMW 525I 2.5 L check engine light fault codes stored in the vehicle is operating normally
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1. based on the secondary air system fault codes that are stored in, there is little or no secondary air motor. Typical causes of this problem have failed secondary air pumps and/or secondary air non-return valves. Secondary air pump tukemin, under normal circumstances, when the vehicle is first started to run the system test. The pump typically is heard, running in front of the right angle with the vehicle standing on. 2. the Secondary air pump is located in the engine compartment right front piece. Secondary air conditioning fuel pump relay is located in the glove box is controlled by the engine control unit and sends power to the secondary air pump. 3. the air pump from the computer and check the power supply and the Earth of the pump action is possible. 4. shut-off valve on the front of the cylinder to be involved in a vacuum and a Visual inspection, opening the valve. 5. the Vacuum line to the solenoid valve should be inspected for cracks, or unplug the works. The vacuum line on the right side of the monitor on the back of the cylinder head cylinder head intake secondary air solenoid in the filed below. 6. the Solenoid should give the vacuum flow shut-off valve of the vacuum pump during use. The solenoid is controlled directly from the engine control unit and receives the power key on the motor-off-period. Possible causes: Air check valve on the engine control module (ECM) engine control module for fault codes. Faulty secondary air pump secondary air supply hose from the second Air Pump relay broken vacuum line of the diagnostic codes: P0491, P0492 author: Robert Jacobs, on average reported mileage: 69066
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