Common faults below

LDV Engine Carbon Cleaning

What we see most on LDV engines, what causes it, and which clean fixes it. Every job starts with a scan and a quote at our Kings Park workshop.

Free scanbefore any work
Kings ParkSydney workshop
20+ yrsMTA certified
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Which LDV do you have?

Most LDVs in Sydney are working vehicles, and that is the whole problem. A T60 on a building site, a G10 doing deliveries, a Deliver 9 running suburban drops — short trips, plenty of idling, stop-start all day, often with a load on. It is the hardest possible life for a diesel particulate filter.

The T60 arrived in 2017 with a 2.8-litre VM Motori turbo diesel, and later T60 Max models moved to a 2.0-litre bi-turbo. The V80 uses a 2.5-litre diesel, and the Deliver 9 a 2.0-litre turbo diesel. The G10 and D90 are the exception — both are sold with a 2.0-litre turbo petrol as well as a diesel, so which half of this page applies to you depends on which one you bought.

The pattern we see is nearly always the same: an engine light, then reduced power, then limp mode with the revs capped and the van barely able to climb a hill. That is usually a filter that has never been given the chance to clean itself — not a failed engine.

We scan the vehicle first and tell you what it will cost before we start. If it is something we cannot fix by cleaning, we will say so.

Common LDV carbon problems

What we see

If you drive a petrol LDV

Petrol

Carbon on the 2.0 Turbo Petrol (G10 and D90)

The petrol G10 and D90 use a direct-injected turbo four, so fuel goes straight into the cylinder and never washes the back of the intake valves.
Oil vapour from the breather bakes onto the valve and hardens.
A people mover or van doing city work builds this up faster than a car doing highway kilometres.

Lumpy idle, worst cold.
Hesitation off the line and weaker pull when loaded.
Misfire codes (P0300–P0304) with the ignition side checking out fine.

Walnut blasting once the deposits have hardened — the intake comes off and the ports are cleaned mechanically.
A hydrogen carbon clean will keep on top of it if you start before the crust forms.

Fixed by

Walnut Blasting

Quoted after the free scan

See the service →

If you drive a diesel LDV

Diesel

Engine Light, Reduced Power, Then Limp Mode

The particulate filter fills with soot and the vehicle protects itself by cutting power, holding the revs down so you cannot keep loading it up.
It gets to that point because regenerations never finish. A regeneration needs a decent uninterrupted run; a work van doing short drops between jobs never gets one.
A differential pressure sensor or exhaust temperature sensor reading incorrectly can also stop a regeneration starting at all, so the filter loads up with nothing to warn you until the light comes on.

Engine light, then noticeably less power, then limp mode with the revs capped.
The van struggling on hills or fully loaded when it was fine the week before.
Fuel consumption up, and a hot smell after parking.
Codes in the P2002, P2452–P2463 range.

Where we can, we clean the filter on the vehicle — it is not removed, cut open or replaced. If it has to come off, it gets a three-stage clean and new gaskets, quoted first.
LDV doesn’t publish a way to start a DPF burn yourself, so the T60 relies on doing it on its own during an uninterrupted run. When it can’t, we start the burn with a scan tool, which works as long as soot is the only problem. Forced burns can wash diesel into the oil on the T60 Max, so keep an eye on the dipstick.
We check whether a sensor or the fuel side is the reason it blocked, because cleaning a filter on a van that still cannot complete a regeneration only buys you a few months.
Nothing is removed or switched off. A van without its emissions equipment is not roadworthy in New South Wales, and it will not pass an inspection.

Fixed by

DPF Cleaning

From $715

See the service →

Diesel

Short Drops, Idling and Stop-Start All Day

A courier or trade van does the exact duty cycle a diesel likes least: cold starts, short runs, long idles at the kerb with the engine running.
The engine spends most of the day below the temperature at which it burns its own deposits off.
Soot accumulates faster than the vehicle can clear it, so the filter is fighting a losing battle from the start.

Regeneration cycles happening more and more often.
The van feeling flat and heavy even before any light appears.
Sootier exhaust tip and a smell of unburnt diesel.

A hydrogen carbon clean is the maintenance step here — nothing comes apart, and it deals with soft carbon before it hardens into a problem.
For a van that never gets a highway run, doing this on a schedule is far cheaper than the filter and intake work that follows if you do not.

Fixed by

Hydrogen Carbon Clean

$275

See the service →

Diesel

EGR and Intake Manifold Coking

The EGR valve routes sooty exhaust gas back into the intake, where it meets oil mist from the crankcase breather.
The two combine into a thick, greasy deposit that narrows the intake runners — on a hard-worked van this can build up surprisingly quickly.
Idling makes it worse, because the deposit never gets hot enough to burn away.

Poor throttle response, worst from low revs and when loaded.
Black smoke under acceleration.
Rough idle, and EGR flow codes (P0401, P0402, P0403).

We clean the EGR circuit and intake manifold so the airway is clear.
This is often what has been quietly strangling a van that everyone assumed was just slow.

Fixed by

EGR & Intake Manifold Cleaning

Quoted after the free scan

See the service →

Diesel

Injector Fouling and Hard Starting

Deposits build on the injector tips and spoil the spray pattern, so diesel arrives in droplets rather than a fine mist.
Incomplete combustion makes more soot, which loads the filter faster — the two problems feed each other.
Fuel quality and long periods parked between jobs both make it worse.

Hard starting, particularly first thing on a cold morning.
Rattly or uneven running at idle.
Smoke on start-up and a drop in fuel economy.
Fuel rail pressure codes (P0087, P0088, P008A).

We clean the whole fuel system on the vehicle, engine running — injectors, pump and rail — without removing injectors or sending them away for bench testing.
On a van that has also blocked its filter, this is the half of the job that stops it happening again.

Fixed by

Diesel Injector Cleaning

Quoted after the free scan

See the service →

If you drive a hybrid LDV

Applies to any LDV

Any LDV

The Light That Keeps Coming Back

A code gets cleared, the van drives well for a few weeks, and the light returns — usually because the reason it appeared was never dealt with.
On a hard-worked vehicle the intake, the filter and the fuel side all get dirty together, so fixing one and leaving the others just moves the problem along.

The same code returning after being cleared.
Several unrelated-looking faults appearing over a short period.
A vehicle that has been to more than one workshop without anything sticking.

A full engine carbon clean treats the intake side and the exhaust side together, which is the right scope when the whole engine is dirty rather than one part of it.
We scan first, tell you what we have found, and give you the cost before anything starts.

Fixed by

Full Engine Carbon Clean

From $715

See the service →

Keeping your LDV clean

Prevention

To keep a working LDV clean, deal with soft carbon before it hardens. A T60, Deliver 9 or diesel G10 doing short drops, idling and stop-start all day spends most of its time too cool to burn its own deposits. Its DPF burn (regeneration) never gets the uninterrupted run it needs to finish. On a van that never gets a highway run, a hydrogen carbon clean on a schedule is the maintenance step. The petrol G10 and D90 build carbon on the intake valves instead.

If your LDV is showing the engine light, has lost power or is in limp mode, book a time at our Kings Park workshop. We scan it free first, tell you what it needs, and quote before any work starts. If the filter is loaded, that may be an on-car DPF clean, with the sensors and fuel side checked so it does not block again.

NAS is a Professional and knows his work I was told by mechanic he will open send exhaust for cleaning NAS professional performed at a very reasonable price Plus gave guidance to do 1 hour drive a fortnight to clear Very honest operator.

Ram Kishor · Google review

Before any engine work on your LDV, search your VIN on the government vehicle recalls site. Recall repairs are free, so check there first.

Give the van a run between drops. Its filter only finishes a self-clean on an uninterrupted run. Nas’s rule of thumb is a steady run of about half an hour every week, or an hour every fortnight, which short drops and kerbside idling never give it.
Keep kerbside idling short. A long idle keeps the engine below the temperature where it burns its own deposits off.
Watch how often it self-cleans. Self-cleans coming more and more often, or a van that feels flat and heavy before any light appears, are early signs the soot is winning.
Keep up the servicing. Oil changes at the interval in your handbook keep oil vapour from feeding intake deposits.

Book your LDV in

Get a free quote

Tell us the model, the kilometres and what it is doing. We will scan it and tell you which clean it needs, and what it costs, before any work starts.

Get a Free Quote Call Nas — 0455 455 644