These codes indicate your accelerator position sensor has malfunctioned. The computer has gone into limp mode, which allows you to drive to safety without damaging the engine. The computer is unable to determine how far you are depressing the accelerator and doesn't want to over-rev the engine. You need a new sensor.
SOURCE: 2007 hyundai sonata with man. specific code of
Code P1295,P2106 are malfunction in electronic throttle control. P2135 is a fault in throttle pedal position.It might have a crack in the intake manifold. Check with dealer for possible warranty.
SOURCE: I have a hyundai sonata
TSB # 08-FL-004-1 CHECK ENGINE LIGHT P2135 DTC DIAGNOSIS....
there is a problem with the pedal assembly which has your throttle position sensor causing the codes, dealer only part you can install yourself with some know how
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