24 Jul 4 Comments Sue FL1 Tips & Advice, FL2 Tips & Advice ,

At Freelanderspecialist we rarely see a Freelander 2 fail an MOT on emissions, even when it has had a cracked exhaust manifold. We have seen Freelander 1’s fail MOT on emissions caused by failing catalytic converters and  misfires to name a couple. Has your Freelander ever failed an MOT on emissions? Let us know why.

The following is an excerpt from the Driver & Vehicle Standards Agency In service exhaust emission standards for road vehicles 19th edition:

The aim of Euro emissions standards is to reduce the levels of harmful exhaust emissions, chiefly:

  • Nitrogen oxides (NOx)
  • Carbon monoxide (CO) 
  • Hydrocarbons (HC)
  • Particulate matter (PM)

High emissions can be caused by:

  • A badly functioning catalytic converter – an engine’s exhaust gases enter a catalytic converter before exiting via the exhaust pipe. The catalytic converter’s role is to make the gases less harmful. If the catalytic converter isn’t doing its job properly, emission levels may be too high.
  • Engine damage – if components of an engine aren’t working properly, there may be excessive levels of certain chemicals in the exhaust emissions. Damaged head gaskets, pistons or cylinder rings can all result in excessive emissions.
  • Faulty control system – if the emissions control system isn’t working, the car engine may not receive the right blend of air and fuel. A reduction in airflow leads to high emissions.  Putting the Freelander on diagnostics may give you error codes to help identify the problem.