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Hello, i try to repair my friends GMC, he says sometimes he loses some power, anyhow I read out the codes, here they are:
– [ ] P0299 Turbo underboost check wastegate mapsensor
– [ ] P0401 unzureichende abgasrückführung agr verstopfung agr ventil kein vacum agr ventil austauschen, reinigen, schlauch, dpfe sensor überprüfen
– [ ] P0404 agr system, agr ventil überprüfen, intake manifold säubern, Einspritzung säubern
– [ ] P0101 mass air flow, messung der dichte und menge der Luft. Luftmassenmesser wechseln oder säubern. Lufttemperatur
– [ ] P1093 fuel rail pressure too low. Fuel pressure relief valve wechseln oder reparieren, Tank überprüfen, vakuum system, knick in den Leitungen,fuel pump, fuel filter, fuel relay, fuel temperatur
– [ ] P1404 egr position sensor rationality closed. The erg valve is closed.B1480: battery rundown protection circuit Malfunction
B0103: Front Impact Sensor
U1500: Serial Bus communication between all bus related devices
B0229: HVAC is for the recirculation actuator
Does anybody has an idea where the problem can be and what to change probably? I am so lost since 2 month.
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