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Technical Service Bulletin Subaru
Subaru Recall
NUMBER; WWF-89 DATE: 04/2002 APPl.lCABlLlTY: 2000-01 MY Subaru Legacy and Outback 4EAT 2000-02MY Impreza MT5 or 4EAT 2001 —O2MY Forester MT5 or 4EAT SUBJECT: Engine Control Module (ECM) Reprogrammlng
lNTRODUCTlON
Subaru of America, inc. (SOA) has determined that some affected vehicles listed below may require ECM reprogramming. The ECM logic for the air/fuel ratio circuit may not be broad enough to accept the signal parameters 01 the A/F ratio sensor.
Should the A/F ratio sensor signal repeatedly fluctuate beyond the parameters of the ECM logic, the CHECK ENGlNE warning light / Maltunction indicator Lamp (Mil.) will illuminate steadily while the engine is running, advising the driver of a malfunction and the need to seek repair service. Reprogramming the ECM will broaden the allowable A/F ratio signal parameters and correct this condition.
This condition is a software issue and has no impact on vehicle emissions or driveability. This service program will involve reprogramming the ECM on affected vehicles.
(*1) Legacy and Outback vehicles with the H6 engine or MT5 transmission are not affected. (*2) Impreza WRX models are not affected. * Various characters may occupy this position of the VIN.
Affected vehicles are identified in the VIN range chart.
NOTE: Prior to performing repairs, confirm coverage for potentially affected vehicles by using the Vehicle Coverage inquiry in the Dealer Communication System (DCS).