Failed emissions test P0030 - Emission System for Subaru Forester

Check for broken wires as these codes are unrelated.

I means that the vehicle failed it's emissions test as it failed the digital trouble code reading test 3
the testing station tests the exhaust emissions and the onboard computer
Your computer failed the test

http://www.obd-codes.com/p0141 P0443 Evaporative Emission Control System Purge Control Valve Circuit P0036 HO2S Heater Control Circuit Bank 1 Sensor 2 P0030 HO2S Heater Control Circuit Bank 1 Sensor 1 http://www.obd-codes.com/p0135 http://www.obd-codes.com/p0102
It looks like you have two bad O2 sensors an a bad mass air flow sensor . Is your vehicle a 4 cylinder or 6 0r 8 cylinder ? Bank 1 sensor 1 an bank 1 sensor 2 heater circuits . plus you have a EVAP. emission purge control circuit problem ! I would go on you tube an enter your trouble codes to see videos on testing

Sounds more like O2 sensor heater circuit is grounded out

Bank 1, Sensor 1 Oxygen Sensor Electrical Heater not working.

Check the help link
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Vehicle smog test failed Due to NO MIL/check engine light?
http://schematicsdiagram.blogspot.com/2011/12/vehicle-smog-test-failed-due-to-no.html

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Front O2 sensor heater bad. Replace

Mine just failed emissions test garage said its burning oil what is the soulution

P2237 P2196 P2271 P0030 P0171

These are all O2 sensor trouble codes, except P0171 which is a fuel trim code,

You have a bad 02 sensor - up stream - Bank 1 Sensor 1.

Replace it, then road test. The engine computer has a 'default' fuel trim it uses when an O2 sensor fails so it can protect the catalytic converter. If this hasn't been going on too long, good chance simply replacing the O2 sensor will remedy your problem.

the computer needs to be reset by performing a code erase then drive 500 miles