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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).

 


 
 

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Catalytic Converters dramatically reduce harmful exhaust emissions


Catalytic Converter
Catalytic converters typically consist of a ceramic or metal honeycombed monolith substrate that carries precious metal catalysts.