1994 Audi 90 CS QuattroFACTORY OEM SERVICE PROCEDURE

ECM "B"

Enter self-diagnostics. See ENTERING SELF-DIAGNOSTICS. Select function 07, ENCODE CONTROL MODULE. Input appropriate 3-digit code based on vehicle application. See ECM ENCODING APPLICATIONS table.

ECM ENCODING APPLICATIONS

Code Transmission Equipment
00 Manual (1) *
001 Automatic (AG4) (1) *
002 Automatic (HP18) (1) *
003 Manual (2) *
004 Automatic (AG4) (2) *
005 Automatic (HP18) (2) *
006 (3) (3) *
007 (3) (3) *
008 (3) (3) *
009 (4) Manual (5) *
010 (4) Automatic (AG4) (5) *
011 (4) Automatic (HP18) (5) *
(1) With oxygen sensor heaters, EVAP and without EGR.
(2) With California and Federal emissions, oxygen sensors, EVAP, EGR with EGR temperature sensor, and speed limiter.
(3) If ECM is encoded with this code, vehicle will exhibit poor driveability, increased fuel consumption, excessive emissions, decreased transmission life and false codes.
(4) On vehicles equipped with oxygen sensors, if ECM is encoded with this code, the oxygen sensor control, EVAP system and EGR system may not operate.
(5) Without oxygen sensors, EVAP and EGR.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.