A8 Quattro Sedan V8-4.2L (ABZ) (1998)
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Check wiring for open circuit or short circuit to B+ or Ground between 2-pin harness connector and ECM.
2-pin ECT sensor connector terminal
VAG1598/19 test box socket (ECM terminal)
1
A23
2
A19
If no wiring or sensor malfunctions are found:
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Replace ECM and generate new readiness code. Refer to "Monitors, Trips and/or Drive Cycle (Readiness Code)/Generating, Readiness Code"
See: Powertrain Management/Computers and Control Systems/Testing and Inspection