Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
WXV-79 Engine Control Module Service Program (TIPS 1100-07)
Reference number: TIPS 1100-07
WXV-79 ENGINE CONTROL MODULE SERVICE PROGRAM
TECHNICAL INFORMATION TIP - MANUFACTURER
| SUBARU: | 2000 Legacy, Outback |
| CATEGORY: | Subaru Tech T.I.P.S. 2000 |
| GROUP: | 11 - Emission Systems |
DESCRIPTION
(11) WXV-79 ENGINE CONTROL MODULE SERVICE PROGRAM
The WXV-79 Service Program involves the inspection and possible replacement of the engine control module on some 2000 MY Legacy/Outback models with manual transmission.
As indicated in the Service Program Bulletin, there is a very small possibility that the Front Oxygen (Air/Fuel Ratio) Sensor on affected vehicles may become inoperative when the vehicle has been in use for an extended period of time with a malfunctioning ECM.
The inspection process involves checking the ECM for trouble codes prior to replacement. Dealers should be reminded that the Front Oxygen (A/F) Sensor should ONLY be replaced when trouble codes P1130 or P1131 are present. Replaced sensors may be requested for return to SOA for testing.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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