A YOUNG friend has a problem with a Nissan X-Trail where the motor will either cut out at suburban traffic speed, or run very rough and lose all power, which is extremely dangerous. Unfortunately it appears that it is beyond the Nissan dealer’s ability to fix it. Nissan dealers have had the vehicle on their diagnostic rigs and said it registers no electronic faults. We have done all of the other things, having the fuel tank and lines cleaned, replaced fuel filters, spark plugs and leads. The way the engine behaves when it restarts suggests it is not a fuel-related problem and it is now a case of possibly replacing the various sensors, anticipating that one of them is doing things that are not registering a fault on the diagnostic rig. It is very disappointing that Nissan dealers cannot fix their own cars and car owners are expected to go through the expensive process of replacing bits until they cure the fault. It raises serious questions about the use of diagnostic rigs to say there are no faults in an engine when there obviously are. This raises the question of whether the X-Trail should be subject to a safety recall when it could lead to a very serious accident. The young lady who owns the car is naturally at her wits’ end and any suggestions you can provide would be appreciated.
Trevor Bowley, email In Nissan’s defence, it can be difficult to isolate and fix a problem that occurs intermittently. If it doesn’t occur in their presence then it’s hard to criticise dealers and their mechanics. But your friend should go back to the dealer and call on Nissan’s help to sort the problem out. The dealer should provide a courtesy car while her car is off the road.
It sounds as if it is going into limp-home mode for some reason and by turning the engine off and restarting you are resetting the computer. It is probably a sensor playing up but because it only happens intermittently it’s hard to trace. Give the dealer as much information as possible to locate the cause. AXLE TO GRIND My 1997 EL Falcon had a droning sound coming from the back wheel, which was diagnosed as a faulty wheel bearing. I had it replaced with a Repco bearing but within 10km
Mystery: Apower loss is causing problems for an X-Trail driver