P0400 recirculation exhaust gas flow egr system code troublecodes malfunction causes common Egr sensor recirculation exhaust p0404 gas valve carparts replacement Chevy silverado p0304: cylinder 4 → misfire detected
P0400 – Exhaust gas recirculation (EGR) system -flow malfunction
P0404 and p0420
P0404 and p0420
P0400 – exhaust gas recirculation (egr) system -flow malfunctionP0404 code: exhaust gas recirculation circuit range/performance problem Silverado chevy code p0121 p0442 p0171 p0304 misfire trouble common relatively detected cylinder stands.
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