A4 Quattro Wagon L4-2.0L Turbo (BPG) (2005)
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Remove Engine Speed (RPM) Sensor G28 and check sensor wheel for proper seating, damage and run-out.
If the specification is obtained:
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Replace the Engine Control Module (ECM) J623.
Final procedures
After repair work, the following work steps must be performed in the mentioned sequence:
1. Check the DTC memory.
2. If necessary, erase the DTC memory.
3. If the DTC memory was erased, generate readiness code.
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End diagnosis and switch the ignition off.