Golf GLS L4-2.0L (AVH) (2002)
If catalytic converter is rattling:
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Visually inspect vehicle underbody to ensure that converter was not damaged from outside influence such as dented converter housing, etc.
If signs of external damage to catalytic converter exist:
The cost of replacement catalytic converter is NOT covered by warranty.
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Continue to Interrogating DTC memory (below).
Interrogating DTC Memory
Interrogate Diagnostic Trouble Code (DTC) memory (DO NOT erase DTCs).
Required Documentation
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For Analysis and Warranty purposes, you MUST make (and store) print-outs of the DTC memory, including:
Address 01 fault memory including ECM information.
"OBD" freeze-frame modes 2 and 6.
Tip:
For OBD, see ElsaWeb, Repair Manual - Fuel Injection & Ignition 2.0 Liter 4-Cyl. 2V Generic Scan Tool.
Steps for printing OBD" from the touch screen:
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Select "OBD".
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Select "mode 2".
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Select all PIDS displayed (use scroll bar if necessary)
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Select right arrow key to display results.
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Select "print", and then save result.
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Save results for modes 2 and 6.
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Print self diagnosis log.
Address 01 Measuring Value Block (MVB) 46.
Tip:
The DTC codes present will need to be erased before the test will run in MVB 46.
Is DTC P0420 (Catalyst System Efficiency Below Threshold, Bank 1) Stored?
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Check if DTC P0420 (Catalyst System Efficiency Below Threshold, Bank 1) is stored.