Question about 2003 Mitsubishi Lancer
I took it to the auto parts store and they pulled two codes. 1 was the #1 spark plug was misfiring and the other was Emissions bank 1. I changed the spark plugs and the O2 sensor and the car was running alot better for about a day. Now the light is back on and is idling funny. Sometimes high and sometimes low.
You can't guess with this vehicle take it to Auto-Zone they will check the code for free and get back to me. Good Luck
Posted on Dec 20, 2008
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Posted on Jan 02, 2017
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The check engine light/service engine soon (yellow light) comes only when the computer control unit (called the PCM) senses a fault in the electronic controls of the engine and/or the emission system u will seldom feel the car engine run any different, there are about 200 possible faults that turn the light on, to know what has developed a problem you must have the system tested, this is called an OBD2 fault code test, Kragen and Autozone parts stores do this testing for free.
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