changed timing belt. marks ok. cranks,no start. 0335 code. changed sensor. same

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checked voltage. red 12.9. grn/yel 4.9. grd good on brn. cranked engine, volts fluctuate on signal wire. code reader shows 130 rpm crank speed.which wire is "A" circuit?notsure where to go from here. PCM? was told they don't fail. car was driven in