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Nice to meet you guys, I'm the owner of the 5th generation R32. Currently, I have the fault code P1545. I replaced all throttle body, MAF sensor, fuel pump, ignition coil, ignition plug, throttle body connector, but I still have P1545. When started, the idling condition is unstable and maintains 1000 rpm. The EPC and ABS warning lamps will then appear in the instrument cluster. However, it sometimes changes to P0122, P0222 code, not P1545. Is this an ECM issue?
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MkV R32
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Get a DIY subscription to AllData and get the wiring diagrams. You probably have an issue with power supply. There should be a relay in the main distribution block under the hood that powers all of that. I know in the MK4s that when you see all those faults you have a faulty fuel pump relay.
 
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