London Low Emission Zone - Feasiblility Study

Yes, the EGR is the most likely cause. Other causes are a bad catalytic converter, of a high operating temperature caused by a faulty thermostat, low coolant, or a cooling fan not working.

2 Responses

1. damaged110 Says:
   December 14th, 2009 at 11:56 am

   have the egr valve looked at. that is what controls nox emissions
   References :

2. tech Says:
   December 14th, 2009 at 12:44 pm

   Yes, the EGR is the most likely cause. Other causes are a bad catalytic converter, of a high operating temperature caused by a faulty thermostat, low coolant, or a cooling fan not working.
   References :

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