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oldsmobile, intrigue gl 3.5L
CK FUSE TO PUMP & RELAY OK
FRONT O2 90.MV-800MV
if the relay is good..the problem may be the air pump itself....these will go bad sometimes...
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DESCRIPTION The control module activates the Secondary Air Injection (AIR) System by grounding both the pump relay and the vacuum control solenoid control circuits simultaneously. This energizes the AIR pump and the vacuum control solenoid. Vacuum is then applied, opening the valves. The pump then forces fresh air into the exhaust stream in order to accelerate catalyst operation. The control module will run up to 3 diagnostic tests using the pre-catalyst Heated Oxygen Sensor (HO2S) voltage and Short Term FT to diagnose the system. The system can be diagnosed during normal Secondary Air Injection operation or the control module can activate the system specifically for diagnostic purposes. If an air flow condition is detected, this DTC will set. When inactive, the system prevents air flow in either direction.CONDITIONS FOR RUNNING THE DTC
CONDITIONS FOR SETTING THE DTC
ACTION TAKEN WHEN THE DTC SETS
CONDITIONS FOR CLEARING THE MIL/DTC
DIAGNOSTIC AIDS If the DTC cannot be duplicated and is determined to be intermittent, reviewing the Failure Records can be useful in determining when the DTC was last set. Also refer to Testing for Intermittent and Poor Connections in Diagrams.A short to voltage in the pump relay control circuit can result in the AIR pump running continuously with the ignition OFF by backfeeding to ground. This will eventually result in pump failure.An AIR pump that had become inoperative and had shown indications of having exhaust gases in the outlet port would indicate check valve failure.TEST