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Chevy s10 2002 p0302, p0457

\015 My 2002 chevy S10ls 4 door 4x4 4.3l started out with a intake manifold leak, mechanic changed Gasket. After this I got a p0302 code so he replaced spark plugs, wires dist. cap rotor code still there. he replaces complete disturber now code crankshaft sensor and misfire still there.he replaces crankshaft sensor back to cyl 2 Misfire. next injector was replaced still cyl 2 misfire and now evap.system leak. He checked compression electrical spark plug. He is telling me now that it needs to go to a dealership to have their analyzer marry the new sensors with my trucks computer. Anybody have an answer he has had my truck for 3 weeks.\015 Posted / edited by AnonymousUser on : 18-10-2021

Answers :

Code p0302 refers to cylinder 2 misfire detected===causes --engine mechanical fault--wiring---ignition/fuel system---injector--ECT/MAF sensor---ECM
code p0457 refers to evaporative emission system--leak detected (fuel cap loose/off) ==causes --mechanical fault--hose connections---EVAP pressure sensor
Replace faulty items. Use only genuine items as replacement
as non-genuine are not always compatible with the OEM fitted CPU units. This results in the fault codes not cancelling out. If possible you may be able to get the CPU reset to work with the non genuine items you already have.
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