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P0420 and P2181

My Golf has fault codes in memory for catalytic converter being bad and cooling system malfunction. How much is the catalytic converter going to cost? I have replaced the temp sensor and waterpump and I still have the fault in memory. Any ideas?

—submitted by Jettacatfault on February 4th 2009 at 10:52am.


  • DannytheMechanic
  • Posts: 163

What year and engine does your Golf have? Some of the vehicles have a software update dealing with false p0420 cat faults that are addressed by the dealer updating your engine computer software. This would be considered a recall and covered for free by your local dealership.


  • Jettacatfault
  • Posts: 2

I have the 2.0 liter engine.


  • DannytheMechanic
  • Posts: 163

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