Auto-Union OBD Trouble Code 28

Auto-Union Problems For OBD Code 28

Quad-driver module (computer) circuit #2 fault

Air leak

Main oxygen sensor fault (for ES300, SC300 and GS300 models)

No. 2 oxygen sensor/heater signal fault

EGR Vacuum Solenoid Valve

Check 28 OBD1 Code For All Auto-Union Models

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