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The P0011 error code in a Kia Spectra points to a problem with the camshaft timing, specifically with "camshaft position A" being "over advanced" in Bank 1 of the engine. The Engine Control Module (ECM) detects an abnormal difference between the timing it commands and the actual movement of the camshaft. This code is triggered by data collected from the camshaft and crankshaft sensors. One possible cause of this fault is blockages in the passages from the oil control solenoid to the camshaft in Bank 1. This could be due to using the wrong oil viscosity or using old, thickened lubricants. Signs that the camshaft is over-advanced include difficult starting, a lit-up "check engine" indicator, reduced fuel efficiency, and rough idling or stalling.
P0011 is an acronym representing an issue with the timing of the camshaft, specifically indicating either an over-advanced position or system performance problem on Bank 1.