|2.0 TDi 140 and 170 engines with DPF filters – post 2008
||Check the DPF (Diesel Particulate Filter) warning light on the dash comes on with the ignition and goes off after a few seconds. Check that the engine management warning light is not on at the same time as the DPF warning light.
||The DPF is there to remove harmful particulates from the exhaust when the car is running. The DPF is not really suited to small runs and town driving/school runs in particular as the filter does not get hot enough to burn the particulates off and it gets clogged up. Running the car at 2500 rpm for 5/10 miles in 4th gear should allow the DPF to get hot enough to burn off the particulates clogged up inside. If doing this does not cause the DPF warning light to go out and/or the engine management is on at the same time as the DPF light it means either that the sensors on the DPF need to be replaced or the DPF itself needs to be replaced. If this fault is left unchecked it can cause major damage to the exhaust system.
||If either the DPF warning light or engine management warning light stay on (or the car goes into Limp Home mode) then have car inspected by a qualified mechanic.
||Test drive the car and look for loss of power/sluggishness or a very loud whistling sound from the top of the engine whilst it is running. All turbos whistle to some degree but you are looking for a very loud, ragged whine. Open the bonnet and listen to the top of the engine whilst it is being revved. When driving, check carefully for power trailing away after 4000rpm.
||These faults indicate the turbo may be blown.
||It may be fixed under warranty if the car is less than three years old (last year of warranty has a 60,000 mile limit). If there is any suspicion of the turbo being blown then it would be advisable to have the vehicle professionally inspected at the vendor’s expense. Otherwise try to negotiate at least £1000.00 off of the asking price or have the repair carried out as part of the deal. Make sure the EGR (Exhaust Gas Re-circulation) valve is replaced at the same time. This part can often be the cause of turbo problems on these engines.
||Check the paperwork to see if the cam belt has been changed on schedule. The 1.6 FSI petrol engine requires a cam belt change at 40,000 miles, 2.0TDi is at 95,000 miles or 4 years and 2.0 FSI petrol needs inspecting at 40,000 and changing at 80,000. The 1.9 TDi diesel is at around 60,000/70,000 miles.
||If the cam belt and associated parts (such as water pump and tensioner) have not been changed, and the mileage is over these boundaries, the cam belt is likely to fail soon. Usually the engine has to be replaced or at least re-built after a cam belt failure.
||Ensure that the cam belt is changed before the car is driven anywhere if it is coming close to its interval. Changing the belt will cost £200. It will cost £1,000+ to have the engine repaired if the belt fails.
|Engine (1.9/2.0 TDi turbo diesels)
||Test drive the car. At low speeds, especially in town. Check for the engine running roughly at idle. Check for the engine running hot and an engine smell entering the cabin. Also pay attention to any hesitation from the engine at low speeds.
||If you find any of these faults then there may be a problem with the EGR (Exhaust Gas Re-circulation) valves. These valves are there to use exhaust gas to regulate the temperature and running of the engine. If they get stuck open then you might expect to see the faults specified.
||If you find this fault try to negotiate a £400.00 discount off of the price of the car.
||The Octavia has the option of two servicing programmes - the initial choice of which is up to the first owner but a buyer of a second hand Octavia can swap from one to the other. The first option is “LongLife” servicing programme. One this option the servicing is up to 20,000 (petrol) or up to 30,000 miles (diesel). The other servicing option is “Time and Distance” servicing which is every 10,000 miles or every 12 months. If the car has been on "long life" servicing then it is crucial to check the the factory specifications for oil have been maintained.
||Check the mileage/servicing option to make sure there is no service due. Be aware that the “LongLife” servicing is mainly for high mileage users and the “Time and Distance” for lower mileage users. This can give an indication as to how the car has been used. It is crucial that the correct oil has been used because the sensor for the service indicator uses engine oil to dertermine when a service is due. The wrong oil can cause that sensor to malfunction.
||If there is a service due then negotiate £150.00/250.00 off of the price unless the car is on “LongLife” servicing and close to 60,000 miles – in this case try to bring the price down by £600.