2005 Subaru Impreza WRX 2.0L MIL Lamp on
replace cat with factory for po420,code returned in less than 1000 miles-i suspect the front air fuel ratio sensor may be the problem-but cant find a spec for its output voltage, thanks for your help.
FIX posted 5/6/2009
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Vehicle Data2005 Subaru Impreza WRX
Trouble Codes
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Vehicle Data
2005 Subaru Impreza WRX
VIN | JF4GG22645 |
Engine | 2.0 L / 4 cyl / GAS |
Trans | 5-speed Standard |
Delivery | FI |
Emissions | OBD-II Compliant |
Symptoms | MIL Lamp On |
Trouble Codes
P0420 | Catalyst Efficiency Below Threshold (Bank 1) |