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Home >> Audi >> 2000 >> A4 Base, 2.8 H, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - Introduction >> Retrieving Diagnostic Trouble Codes >> Visual Inspection
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Visual Inspection

Prior to retrieving Diagnostic Trouble Codes (DTCs), perform a comprehensive visual inspection of ground connections located on intake manifold, ensure battery negative cable is okay, and check ground cable between engine and vehicle body. Repair as necessary. Check vacuum hoses for breakage and blockage. Check electrical wiring and connectors for damage and corrosion. Repair as necessary.

NOTE: Manufacturer does not provide procedure for retrieving DTCs without scan tool. If using Volkswagen Audi Group (VAG) 1551 scan tool for diagnosis, follow manufacturer's instructions for operation. VAG 1551 is recommended for diagnosing DTCs.
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