LDV Problems

The coolant reservoir tank on your intercooler system works as an expansion tank, so it will have a high and low mark somewhere on it so you can keep the coolant at the correct level. It should be between the high and low marks when the engine is cold. Too high and coolant will be lost when the intercooler gets hot; too low and you won’t have enough coolant for the intercooler to work efficiently.

Modern engines are pretty coolant-specific these days, so you need to check your owner’s manual to see precisely what coolant is specified for the intercooler. It may be different to the one for the radiator because of the materials the intercooler is made from. That said, in the case of the LDV, I believe the correct coolant for the intercooler is the standard green type and is also used in the car’s engine cooling system.

There are plenty of things that can cause this, but being a petrol engine with no turbocharger, it shouldn’t be too tricky to diagnose. Any time an engine runs well when warm but struggles when cold, suspicions are drawn to the fuel/air mixture. A warm engine needs a very different mixture to a cold engine, so modern engines have sensors that monitor the engine temperature, the air/fuel ratio and how well that mixture is burning. If any of those sensors are not telling the computer everything it needs to know, poor running can be the result.

But it would also be worth looking at the air intake side of things. An air or vacuum leak into the intake manifold can also cause rough running and hard starting. The engine’s stepper motor (which controls the idle speed) could also be at fault, but could also be the victim of one of those non-working sensors.

On the face of it, there’s a lot wrong with the way you’re being treated here. For a start, if the car has already had the software upgrade for the accelerator calibration and it’s still playing up, I’d suggest there’s still something wrong with the throttle-by-wire system in place. So it needs to be looked at. Your car was sold new with a five-year/130,000km warranty, so this is really LDV’s problem to fix provided you’ve had the car serviced correctly and haven’t exceeded that mileage.

As such, the dealership should not be in a position to charge you an hourly rate to fix a warranty issue. As for the old 'they all do that’ nonsense, that’s an example of a dealership treating its customers like idiots. Cars do not die when you take off, regardless of how hard you accelerate, and to suggest that they do is an insult to your intelligence.

So give this dealer the flick and either try another one or – better yet – go straight to the top and contact LDV Australia’s customer service division. Australian Consumer Law is pretty unambiguous on this stuff.

Conventional wisdom suggests you’ve either had a major failure of the transmission which has torn the casing open and allowed the oil out, or you’ve run over something that has punched a hole in the gearbox and produced the same results. But depending on the size of the puddle under the car, you might simply have been losing transmission fluid through a breather or missing or loose fill-plug for some time and only just now noticed it when the vehicle rolled to a stop.

The reason the car will not go into gear or produce drive is that it requires fluid (oil) to do so. If that oil escapes (hence the puddle) then those gear selection and drive functions are lost.

Don’t be tempted to top up the gearbox and try to drive home. The unit could fail on you again at any time (depending on the size of the leak) and you risk damaging further a transmission that is low on fluid. This one sounds like a warranty (transmission failure) or insurance (smashed transmission housing) claim.

This is very likely to be an electronic problem based on the fact that if the transmission works properly in manual mode, there’s nothing internally wrong with it. But when you shift it back to automatic mode, there’s a stray or incorrect signal being sent to the on-board computer. In turn, that’s possibly throwing the operation into limp-home mode which is why you suddenly have a loss of power.

Limp-home mode is, as the name suggests, designed to get you home without doing further damage to the vehicle. As such, it can limit power, limit top speed and even lock you out of certain gears to ensure this happens. Have the vehicle scanned to see if any error codes are being thrown up by the computer.

The simplest cause of a problem like this is the little sensor that `knows’ when the gear selector is in park. If the sensor fails or is maladjusted, it can’t tell the computer that the vehicle is in park (or neutral) at which point the computer won’t allow the engine to start.

However, before you start replacing bits and pieces, consider that this is a pretty obvious warranty job and LDV is obliged to fix it at no cost to you. Provided you have had the vehicle serviced properly and haven’t exceeded 130,000km, LDV’s responsibilities are quite clear.

It’s probably trying to tell you that there’s a fault with the Lane Change Assist function which keeps an electronic eye on vehicles that are too close to you for you to change lanes safely. This system can be damaged if the cameras or sensors around the car are damaged or have been bumped or coated in mud or even dunked briefly in water.

While the LCA warning message is showing, you need to be extra careful when changing lanes as the car may not be able to give you all the information it once did when the system was working properly. By scanning the car electronically, the onboard computer should be able to pinpoint what’s wrong with the system. It may just need a recalibration, but this is usually a job for the dealership.

On most cars, you can disable beeps and buzzers that tell you the car has locked or unlocked. Many people choose to do so, too, out of consideration for their neighbours who don’t appreciate even a small toot of a car’s horn when you leave for work at 5am.

On newer LDVs, you can go to the touchscreen and hit Settings. Then touch 'Car' and then 'Comfort' and 'Convenience'. That will then offer a list of features, but the one you want to touch on is 'Locking Feedback'. That will then give you the choice of 'Lights and Horn', 'Lights Only' or 'Horn Only'. By touching on 'Lights Only', you should have disabled the horn beep when locking and unlocking. Your neighbours will thank you.

It would appear the vehicle has gone into limp-home mode. This limits how much power the engine produces and how fast the vehicle will go as a means of protecting the engine and transmission from damage due to whatever the root cause is. Often a low coolant or oil level or high temperature will force the car into limp-home mode, but there are many other reasons for this to happen. You need to take the car to a workshop which will be able to scan the vehicle electronically and gain a better idea of what’s going on.

Don’t forget, either, that provided you car is less than five years old and has travelled less than 130,000km, it should still be covered by the LDV factory warranty.

As for the colour of the oil, diesel engines are notoriously filthy things and nearly always turn their oil black in a very short space of time. In fact, even when topping up with new oil, by the time it has reached the sump and appears on the dipstick, it’s already black.