The following operating conditions:
Or operating faults such as:
as they may cause the catalytic converter to overheat and thus reduce its efficiency, or damage it irreparably and cause heat damage to the vehicle. If you notice any of the above operating faults, have the necessary repairs carried out as soon as possible by an approved Dealer. These faults may be avoided by regularly taking your vehicle to an approved Dealer at the intervals specified in the Maintenance document. Starting problems To avoid damaging the catalytic converter, do not keep trying to start the engine (using the start button, or by pushing or towing the vehicle) without having identified and corrected the starting fault. If the fault cannot be identified, do not keep trying to start the engine, but contact an approved Dealer.
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Renault Koleos Service Repair Manual > Antipollution: Oil vapour rebreathing
circuit: Operating diagram
2TR I - Under low loads, the oil vapour is rebreathed through the PCV valve Fresh air Oil vapour PCV valve Fresh air hose II - Under medium and heavy loads, the oil vapour is rebreathed through the PCV valve and the fresh air hose Oil vapour PCV valve Fresh air hose M9R Engine Oil separator Air filt ...