Vauxhall Mokka 1.6 CDTi Engine Problems

 I’ve always admired the Vauxhall Mokka 1.6 CDTi. Its compact design and great fuel efficiency allow for a great ride. However, just like any other vehicle, the Mokka 1.6 CDTi does have its share of challenges.

Navigating these challenges can be daunting, especially when they concern the heart of your vehicle – the engine. I’ve compiled this guide to enlighten Vauxhall Mokka 1.6 CDTi owners on the most common engine problems that they’re likely to face. 

Engine Issue Symptoms

Vauxhall Mokka Engine

One of the first and most daunting signs of engine trouble in the Vauxhall Mokka 1.6 CDTi is the  check engine light coming on. When this light comes onto your mokka’s dashboard, it’s essential not to ignore it. Symptoms that might accompany the check engine light include the engine misfiring or going into limp mode.

Engine misfires are a fairly common symptom when your check engine light is on.  They often manifest through a juddering sensation while driving or when the car is idle. Various factors can cause engine misfires, including:

  • Problems with fuel injectors
  • An aged or faulty EGR Valve
  • Engine knock or rattle
  • Issues with your turbocharger

An apparent lack of power or loss of power is another symptom that could accompany the check engine light with the Vauxhall Mokka 1.6 CDTi. You might notice this if your vehicle struggles uphill, takes longer to speed up, or there’s a noticeable drop in acceleration. This issue can be due to turbocharger faults, engine failure, or problems with your fuel injector system.

One of the most obvious signs of engine problems is excessive smoke coming from under your Mokka’s bonnet or from the exhaust pipe. This could be caused by DPF problems or problems with the engine coolant system. White or blue smoke can indicate high fuel consumption while black smoke from the exhaust could be a sign of a blocked DPF. The presence of a DPF warning light on your dashboard along with the smoke is a clear indication that the DPF is blocked.

Another cause of excessive smoke, particularly blue or white smoke, can be oil leaks or oil contamination leading to oil sludge in your system. It’s critical to monitor this closely as this can escalate to serious Vauxhall Mokka 1.6 CDTi engine problems if not addressed promptly.

Turbocharger Faults

Vauxhall Mokka Turbocharger

The common symptoms of Vauxhall Mokka 1.6 CDTi turbocharger faults include:

  • Unusual engine noise or rattling noise coming from the engine bay
  • Excessive smoke coming from the exhaust
  • Check Engine light on the dashboard
  • A significant increase in oil consumption
  • A decrease in fuel efficiency, leading to high fuel consumption

When dealing with these symptoms, I’ve discovered that pinpointing the root cause is vital. A proper diagnosis can indicate possible issues like turbocharger wear or even the presence of oil leaks within the system.

If you identify a turbocharger fault as the cause of your car’s problems, you may have to consider a turbocharger replacement. Although this process can be quite costly, it may be necessary to restore your vehicle’s performance and prevent any further damage to the engine.

It’s important to keep in mind that, in some cases, the root issue may lie in a clogged air intake or faulty sensors. Addressing these issues before resorting to a complete turbocharger replacement will not only save you money but avoid further complications. In any case, seeking professional assistance is the best course of action for diagnosing and resolving turbocharger faults effectively.

Diesel Particulate Filter (DPF) Problems

Diesel Particulate Filters (DPFs) are essential components in diesel vehicles that trap soot and harmful particles in the exhaust. However, DPFs can often face issues, mostly from clogging due to failed regeneration.

Signs that a DPF needs attention include:

  • The DPF warning light illuminating
  • The vehicle juddering whilst driving
  • Increased fuel usage
  • The vehicle going into limp mode
  • Excess smoke from the exhaust
  • Suddenly losing power

DPF clogging typically happens due to short trips where the engine does not get hot enough for regeneration. Regeneration burns off the built-up soot and fixes the DPF.

If DPF regeneration continues to fail, the DPF warning light may come on. In this case, replacing the DPF may be required to protect the engine.

It is critical not to ignore a DPF warning light or other symptoms. A blocked DPF can damage the filter and even cause engine failure in the worst case. If there are possible DPF problems, always have a mechanic check to diagnose the issue correctly and replace the DPF if necessary.

EGR Valve Issues

The Exhaust Gas Recirculation (EGR) valve has an important job in increasing engine efficiency, and reducing fuel consumption by sending some exhaust gas back into the engine. However, over time, the EGR valve can break down. I have seen many problems caused by a broken EGR valve, from small issues with how the engine runs to the EGR valve completely failing.

There are some signs that show your EGR valve might require maintenance; these include:

  • The engine not running well, like stalling or hesitating
  • Using more fuel
  • The engine warning light coming on
  • Strange engine noises or knocking
  • Smoke coming from the exhaust

Looking out for these signs can stop expensive repairs to the EGR valve later. Fixing issues early keeps your vehicle running well and your engine healthy.

If you think the EGR valve needs fixing, I strongly recommend taking the vehicle to a mechanic. They can check the problem and replace the EGR valve if needed to get your Vauxhall Mokka 1.6 CDTi running right and keeping emissions in check. Regular servicing, like cleaning the EGR valve, also helps it last longer and keeps your vehicle in good shape.

Fuel Injector Problems

Fuel injectors are crucial in delivering the proper amount of fuel to an engine for the best performance. However, injector issues can appear over time, causing an engine to lose power and possibly leading to high-cost repairs.

If you notice these signs, it’s time to address them as they could indicate fuel injector problems.

  • Too much smoke from the exhaust
  • Engine misfires that disrupt smooth running
  • Higher fuel usage impacting efficiency
  • Engine warning lights on the dashboard
  • Noticeably less power when accelerating

If these happen, it’s important to have a mechanic check the cause. Ignoring them can lead to more damage, even possible engine failure.

Sometimes, the mechanic may suggest replacing injectors if problems continue or if the injectors are badly damaged. Though replacing fuel injectors can cost quite a bit, it’s worth it to restore performance and prevent harm to other engine parts.

It’s also important to note that regular maintenance like fuel injector cleaning helps injectors last longer and keeps engines running well. Always address fuel injector problems quickly to protect vehicle performance and your peace of mind.

Oil Leaks and Contamination

Oil leaks and contamination are serious issues that can damage your engine if left unaddressed. Dark stains under the car, low oil levels, a burning smell, or murky oil are signs there may be a problem. It’s important to maintain your vehicle’s oil health to prevent costly repairs.

I’ve seen many cars, like the Vauxhall Mokka 1.6 CDTi, struggle with oil leaks. These leaks can hurt how the engine runs and even ruin it completely. Oil contamination, which is when the oil gets dark and muddy, causes trouble too.

You must fix oil issues right away. Look for:

  • Dark spots or puddles under the parked car
  • Low oil level on the dipstick
  • Strong burning oil smell
  • Milky, muddy oil
  • A lit up engine warning light

To keep the engine in top shape, follow the guidelines for oil changes and checkups. For the Vauxhall Mokka 1.6 CDTi, always use the oil type and thickness listed in the manual. Regular oil and filter changes prevent leaks and contamination, help the engine last longer, and keep the car running well.

If there are any signs of oil leaks or contamination, take the car to a mechanic immediately. They can find the leak or contamination source and fix the problem. Quick action is key to avoiding expensive damage.

Gearbox-Related Issues

Gearbox problems are some of the most concerning mechanical issues for drivers. Whether strange noises when changing gears, difficulty shifting, or the engine warning light turning on, these signs point to potential gearbox troubles.

Here are common signs of gearbox issues:

  • Difficulty changing gears.
  • Unusual sounds when shifting.
  • Bad shaking or grinding while driving.
  • The vehicle popped out of gear.
  • An unresponsive or jumpy clutch pedal.
  • The engine or gearbox warning light is on.

If you notice any of these, have a mechanic check the vehicle immediately. Ignoring the symptoms could lead to bigger issues and an expensive gearbox replacement.

Brake and Suspension Problems

A vehicle’s brake and suspension systems are critical for safe and comfortable driving. If either system develops issues, it can seriously affect a Vauxhall Mokka’s performance.

Signs of brake problems may include:

  • A spongy feeling when braking
  • Noises such as squealing or grinding when braking
  • Longer stopping distances
  • The brake warning light coming on
  • Suspension problems can show through:
  • A bumpy, shaky ride
  • Trouble controlling the vehicle when turning
  • Uneven tyre wear
  • Leaning to one side when parked or driving

If any of these signs appear, it’s vital to get professional help. Faults in these systems impact not only a car’s performance but also safety. Regular service and checks of the brake and suspension systems are key to ensuring a Vauxhall Mokka 1.6 CDTi’s performance and safety. Ignoring these issues can lead to higher repair costs and unsafe driving conditions.


The Vauxhall Mokka 1.6 CDTi may experience some common issues, including problems with the diesel particulate filter, fuel injectors, oil leaks, gearbox, brakes and suspension. It’s important for drivers to understand these potential problems to keep the vehicle running well in to the future.

The health of the Vauxhall Mokka 1.6 CDTi engine is key to how it drives. Look out for signs of trouble, check it often, and fix any issues quickly.

Remember, ignoring Vauxhall Mokka 1.6 CDTi Engine Problems usually makes it worse, but fixing it right away can stop big damage and save time and money. Stay informed and watch out for your vehicle, and you’ll have a safer, better drive.


What are some common Vauxhall Mokka 1.6 CDTi engine problems?

Some common Vauxhall Mokka 1.6 CDTi engine problems include issues with the Diesel Particulate Filter (DPF), fuel injectors, oil leaks, gearbox problems, and brake and suspension systems. Regular maintenance can help prevent these issues and ensure the smooth running of your vehicle.

What causes the Diesel Particulate Filter (DPF) problems in Vauxhall Mokka 1.6 CDTi?

DPF problems in the Vauxhall Mokka 1.6 CDTi are typically caused due to the filter becoming clogged with soot. This often results from frequent short journeys as the vehicle doesn’t get a chance to heat up sufficiently for DPF regeneration.

What are the signs of gearbox problems in a Vauxhall Mokka 1.6 CDTi?

The signs of gearbox problems in a Vauxhall Mokka 1.6 CDTi may be signalled by difficulty in shifting gears, unexplained noises when changing gears, persistent grinding or shaking while driving, or the vehicle slipping out of gear. If these signs appear, it’s recommended to seek professional assistance.

How can I reduce fuel consumption on my Vauxhall Mokka 1.6 CDTi?

Regular servicing of the vehicle, keeping an eye on tire pressure, minimising heavy loads, and practicing good driving habits can help reduce your Vauxhall Mokka’s fuel consumption.

What can cause brake issues in a Vauxhall Mokka 1.6 CDTi?

Brake issues in a Vauxhall Mokka 1.6 CDTi can be caused by wear and tear over time, fluid leakages, faulty brake discs or pads.. Regular maintenance is important to prevent these issues.

What could be causing engine misfires in a Vauxhall Mokka 1.6 CDTi?

Engine misfires in a Vauxhall Mokka 1.6 CDTi could be caused by spark plugs, fuel injectors, or lack of compression issues. Seek professional help to accurately diagnose and fix the problem.

What is the solution for suspension problems in a Vauxhall Mokka 1.6 CDTi?

Solutions for suspension problems in a Vauxhall Mokka 1.6 CDTi include replacing worn-out components such as bushes, shocks, or struts. Always consult with a professional mechanic for accurate diagnosis and treatment.

Dave Marlow
Dave Marlow
Dave has been a petrohead since he can remember. He worked as a mechanic for 12 years before transitioning into automotive content writing. His dream car is a classic Red Ferrari 458.

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