Common faults below

Toyota Engine Carbon Cleaning

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

Toyota engine carbon cleaning at Expert Carbon Cleaning, Kings Park Sydney
  • Free scanbefore any work
  • Kings ParkSydney workshop
  • 20+ yrsMTA certified
  • 4.9on Google

Which Toyota do you have?

If you own a diesel Hilux, Prado or Fortuner built between October 2015 and April 2020, read the first section below before you spend money anywhere. The Federal Court found the particulate filter on those vehicles defective, and there is a compensation process that has nothing to do with us.

For every other Toyota diesel — the LandCruiser, the later Hilux, the 4×4 range generally — a blocked filter is usually a duty-cycle problem rather than a design one, and it is fixable.

If you drive a hybrid — RAV4, Corolla, Camry, Kluger — you have a completely different issue. Toyota hybrids run high rates of exhaust gas recirculation for efficiency, and over time that circuit and the intake manifold silt up with carbon. A rattle on cold start is the classic sign.

Every job starts with a scan, and we tell you what it costs before we start.

Common Toyota carbon problems

What we see

If you drive a petrol Toyota

Petrol

Intake Valve Carbon on the Petrol Models

  • The direct-injection petrol engines spray fuel into the cylinder, so nothing washes the back of the intake valves.
  • Oil vapour from the breather bakes onto the hot valve and hardens.
  • Short suburban trips build it up faster than open-road kilometres.
  • Lumpy idle, worst when cold.
  • Hesitation off the line and softer throttle response.
  • Misfire codes (P0300–P0304) with the ignition side checking out fine.
  • Walnut blasting once the deposits have hardened — the intake comes off and each port is cleaned mechanically.
  • A hydrogen carbon clean will keep on top of it before the crust forms.

Fixed by

Walnut Blasting

Quoted after the free scan

See the service →

If you drive a diesel Toyota

Diesel

The Hilux, Prado and Fortuner Filter Problem

  • The Federal Court found that around 264,000 Hilux, Prado and Fortuner vehicles sold in Australia between October 2015 and April 2020, with the 2.8-litre 1GD-FTV or 2.4-litre 2GD-FTV engine, were not of acceptable quality because the particulate filter was not designed to work properly in normal use.
  • Clogging produced white smoke, poor performance and repeated warnings. Toyota lost its appeal, and a compensation process followed.
  • Toyota also issued a field fix in 2020, so what your vehicle has already had done matters.
  • Heavy white smoke, particularly after idling or in traffic.
  • DPF warnings and reduced power.
  • Repeated forced regenerations without lasting improvement.
  • Higher fuel use than the vehicle had when new.
  • Check where you stand with Toyota first. If your vehicle is in the affected group there is a compensation process and a field fix, and you should not be paying anyone to work around either.
  • Once that is settled, we can clean the filter on the vehicle if it is still loaded — nothing removed, cut open or replaced. If it has to come off, it gets a three-stage clean and new gaskets, quoted first.
  • If cleaning is not the right answer for your vehicle, we will tell you that.

Fixed by

DPF Cleaning

From $715

See the service →
Diesel

EGR and Intake Manifold Coking on the Diesel

  • The EGR valve routes sooty exhaust gas into the intake, where it meets oil mist from the breather.
  • The two form a thick, greasy deposit that narrows the runners — common on 4x4s that spend their lives towing, idling or crawling at low speed.
  • Dusty rural work makes it worse again, because the intake side is already working hard.
  • Flat throttle response, worst from low revs and under load.
  • Black smoke on acceleration.
  • Rough idle with EGR flow codes (P0401, P0402, P0403).
  • A vehicle that tows noticeably worse than it used to.
  • We clean the EGR circuit and the intake manifold so the airway is clear again.
  • Nothing is removed or disabled — a vehicle without its emissions equipment is not roadworthy in New South Wales.

Fixed by

EGR & Intake Manifold Cleaning

Quoted after the free scan

See the service →
Diesel

Injector Fouling on the Diesel

  • Deposits on the injector tips spoil the spray pattern, so diesel arrives as droplets rather than a fine mist.
  • Worse combustion means more soot, which loads the filter faster and starts the cycle again.
  • Long stretches parked between trips let deposits set on the tips.
  • Hard starting after the vehicle has sat for a week or more.
  • A clatter at idle that settles as it warms.
  • Smoke on start-up and worse economy on the same run.
  • Fuel rail pressure codes (P0087, P0088, P008A).
  • We clean the whole fuel system on the vehicle with the engine running — injectors, pump and rail — nothing removed or sent away.
  • On a 4×4 that has also blocked its filter, this is the half of the job that stops it recurring.

Fixed by

Diesel Injector Cleaning

Quoted after the free scan

See the service →

If you drive a hybrid Toyota

Hybrid

The Hybrid EGR Circuit and Intake Manifold

  • Toyota hybrids use high rates of exhaust gas recirculation to keep combustion temperatures and emissions down.
  • The intake manifold carries both fresh air and recirculated exhaust gas, so carbon and oil build up inside the manifold passages and the EGR cooler and valve.
  • The engine also runs at light load and stops frequently, so it rarely gets hot enough to burn any of it away.
  • A loud rattle from the engine on a cold start — the most recognisable sign of a silted-up manifold.
  • Rough running or a misfire in the first minute.
  • The petrol engine cutting in more often than it used to.
  • A hybrid that has quietly got thirstier.
  • The fix is cleaning the whole circuit — EGR cooler, EGR valve and intake manifold — rather than one part of it.
  • This is a maintenance job on a hybrid, not a failure. Caught in time it saves replacing a manifold.

Fixed by

EGR & Intake Manifold Cleaning

Quoted after the free scan

See the service →

Applies to any Toyota

Any Toyota

Short Trips and Suburban Kilometres

  • A Toyota used for school runs and shopping spends most of its time below the temperature at which it stays clean.
  • Soft carbon settles on valves, piston crowns and chamber walls before it can burn off.
  • It applies to the petrol, the diesel and the hybrid — just in different places.
  • A car that feels flat compared with how it drove a few years ago.
  • Idle that varies between starts.
  • Nothing stored on a scan to explain it.
  • A hydrogen carbon clean is the maintenance step for this. Nothing comes apart, and it targets soft carbon before it hardens.
  • On a car doing low, slow kilometres this is much cheaper than what follows if you leave it.

Fixed by

Hydrogen Carbon Clean

$275

See the service →

Watch us clean a Toyota

Real jobs from our Kings Park workshop — the same work we would do on yours.

Keeping your Toyota clean

Prevention

To keep a Toyota clean, look after the side that loads up. A diesel Hilux, Prado, Fortuner or LandCruiser loads up on the exhaust side, in the particulate filter and the EGR circuit. The hybrids silt up on the intake side, because the engine spends so much of its time running gently. A hydrogen carbon clean is the maintenance step before deposits harden.

If your Hilux, Prado or Fortuner was built between October 2015 and April 2020, check where you stand with Toyota first. Those vehicles were part of a Federal Court ruling on the particulate filter, with a compensation process and a 2020 field fix. For everything else, book a time at our Kings Park workshop. We scan it free first, tell you what it needs, and quote before any work starts. That may be an on-car DPF clean or an EGR and intake clean.

I hired Nas to perform an EGR & intake 2 stage carbon clean to prepare my HiAce for a major performance install & dyno ECU tune. I've installed an oil catch can & use fuel additives so I was initially sceptical & thought my van's engine was clean. After the cleaning service I noticed that the BOV is louder plus van cruises up hills more easily & the engine is 5 to 10 Celsius cooler. It feels like the engine runs smoother & cleaner. I would recommend Nas & would go back for another carbon cleaning service again.

Peter Knagge, Toyota HiAce · Google review

I have done this service on my 79 series Land Cruiser and noticeably more power smother engine also got better fuel efficiency and highly recommend.

Pedram Razi · Google review

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

  • Give the diesel a run on the open road. A Hilux or Prado that only does short trips never lets the particulate filter finish its self-clean. Nas’s rule of thumb, a steady run of about half an hour every week, or an hour every fortnight, gives it the chance.
  • Let the filter’s self-clean finish. If it has started, let it finish before switching off. A self-clean cut short leaves soot in the filter, and the warnings come closer together.
  • Expect faster build-up if you tow or idle a lot. Towing, idling and low-speed four-wheel driving all coke up the EGR circuit and intake faster. At idle and crawling speeds the deposit never gets hot enough to burn off.
  • Scan early. A warning light caught early is usually a clean, not a replacement.

Book your Toyota 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 QuoteCall Nas — 0455 455 644

Tell Nas about your car

What are you driving, and what is it doing? Nas will call you back to talk it through — we scan the car at the workshop first, and nothing starts without your OK.

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