Fiat 1.6 MultiJet II and 2.0 MultiJet IIParticulate filter (DPF/FAP)InjectorsEngine sensors
Injector faults and DPF particulate sensor failure on the 1.6 and 2.0 MultiJet II
Why this rating?
Medium severity: It can leave you stranded or get worse if ignored, without destroying the engine.
Frequency occasional: The source documenting the fault in the Jeep Compass expressly describes it as something that happens «in some batches» of the engine, not as a widespread problem; the Fiat Doblò adds injector wear as a further cause of power and fuel consumption problems, without quantifying how many units are affected.[1][2]
Symptoms
- Engine fault warning light on due to a fault in the injection system or the DPF particulate sensor.[1]Engine warning light: other faults that cause it · Garage soon
- Black smoke when accelerating when an injector loses precision in atomising the fuel.[2]Black smoke: other faults that cause it · Garage soon
- Increased fuel consumption associated with injectors that have lost atomisation.[2]Uses more fuel: other faults that cause it · Monitor
Why it happens
Wear or loss of atomisation in an injector alters the fuel and air mixture in the affected cylinder.[2]
In some batches, the DPF particulate sensor itself can fail and generate a warning that is mistaken for an injection problem.[1]
If it is not repaired: A faulty injector worsens fuel consumption and emissions and can leave the engine running less smoothly, without necessarily implying greater damage if corrected in time.[2]
Affected cars and years
The Multijet common-rail injection system is common to both displacements; the sources consulted document the problem in the Jeep Compass (1.6) and the Fiat Doblò (1.6).[1][2]
| Version | Years | Codes |
|---|---|---|
| 1.6 MultiJet II (90-130 hp, 2006-2024) | since 2006 | |
| 2.0 MultiJet II (120-170 hp, 2008-2024) | since 2008 |
Models fitted with the affected versions
Alfa Romeo
- Alfa Romeo Giulietta2010–2020
- Alfa Romeo MiTo2010–2018
- Alfa Romeo Tonalesince 2022
Fiat
- Fiat Bravo2007–2014
- Fiat Doblò II2010–2022
- Fiat Tiposince 2015
- Fiat 500L2012–2022
- Fiat 500Xsince 2014
- Fiat Freemont2011–2015
Jeep
- Jeep Renegadesince 2014
- Jeep Compass MPsince 2017
How much it costs to repair
Includes: Diagnosis of the injection system and replacement of the affected injector or particulate sensor.[1]
We have not found a published price in Spain specific to this engine for an injector or for the DPF particulate sensor.
Prices in Spain, including VAT. A workshop hour costs on average €38–66 at independent garages and €77–134 at dealerships in Spain, depending on the region and the brand. How we calculate costs
How to check for it before buying a used car
- Ask for a fault code read-out: a rail pressure fault or a cylinder with an abnormal contribution can point to a specific injector.[1]
- Watch the smoke under full acceleration: persistent black smoke on an engine with a healthy particulate filter is a reason to check the injectors.[2]
- Compare the claimed fuel consumption with the real figure over several fill-ups before buying.
Parts needed
The part or kit that fixes this fault, according to the sources.
- Buy part at Autodoc (affiliate link, opens in a new tab)
Common-rail injector
Replaced or reconditioned when it sprays fuel poorly.
Affiliate links to Autodoc: if you buy, MotorFiable may receive a commission at no cost to you. Check compatibility using the registration number or the VIN before ordering. More information
How to prevent it
- Fill up at trusted stations and avoid nearly empty tanks, which make it easier to draw in sediment from the bottom.
- Change the fuel filter within the intervals set by the manufacturer to trap impurities before they reach the injectors.
Recalls, campaigns and claims
As of 27 September 2026, we have no record of recalls, campaigns or extended manufacturer warranties for this fault. Check with an official dealer using the chassis (VIN) number: they will tell you whether the car has any outstanding campaign.
What owners say
Frequently asked questions
What symptoms does a faulty injector cause on this engine?
Black smoke when accelerating, higher fuel consumption and a noticeable loss of power in the affected cylinder, as documented for the Fiat Doblò.[2]
Does it affect all units or only some?
The source documenting this fault in the Jeep Compass expressly describes it as something that happens in some batches of the engine, not across all production.[1]
Does the engine warning light always mean an injector fault?
Not necessarily: in some cases the origin is the DPF particulate sensor, which can generate a similar warning without the injectors being damaged.[1]
What can you do now?
We will put you in touch with a partner only if you authorise it in the form.
Other 1.6 and 2.0 MultiJet II faults
- High severityFrequency: CommonEmissions controlSaturated diesel particulate filter (DPF) from incomplete regenerationsIn urban use with short journeys, the particulate filter does not manage to complete its regeneration and becomes saturated; garages recommend a weekly motorway run to avoid it. The filter itself is among the weak points flagged in the 1.6 and 2.0 MultiJet II after a certain mileage.
- Critical severityFrequency: OccasionalTimingEarly tensioner wear and risk of timing belt failureYes: the tensioner can lose tension before the official 120,000 km interval, with a flapping noise that, if ignored, can end in the belt snapping and the valves hitting the pistons. Several garages recommend bringing the change forward to around 90,000 km in mixed use.Repair (garage): €420–€550Appears at around 90,000 km
- Medium severityFrequency: CommonEmissions controlEGR valve blocked by soot in urban useYes: the EGR valve builds up soot with urban use and short journeys, which causes loss of power and turns on the engine fault warning light. It is one of the most frequently cited faults of this engine in both the Jeep Renegade and the Fiat Doblò.Repair (garage): €200–€500
- Medium severityFrequency: OccasionalClutchDual-mass flywheel wear in manual versionsThe dual-mass flywheel on manual versions is one of the weak points flagged in the 1.6 and 2.0 MultiJet II after a certain mileage. When it wears it causes vibrations and metallic noises at idle and when using the clutch, and replacing it is not cheap.
More faults with the particulate filter on other engines and cars
- High severityFrequency: Very frequentOM651EGR and particulate filter clogging, and emissions software updatesThe particulate filter and EGR clog up with short journeys, as on any diesel with these systems. In addition, Germany's KBA required software updates on several models with this engine between 2018 and 2021 because of a function that reduced EGR outside a temperature range.Repair (garage): €800–€2,500
- High severityFrequency: Common1.3 MultijetIncomplete particulate filter regenerations and oil dilutionIn heavy urban use, with short journeys that do not let the particulate filter regeneration finish, unburnt diesel passes into the sump and dilutes the oil; the level can rise on the dipstick and the oil loses its ability to lubricate. Repeated many times, it speeds up engine wear.
- High severityFrequency: Common2.0 HDiDPF clogging on additive-type systems (Eolys/cerine)The additive-type diesel particulate filter (DPF) of the 2.0 HDi clogs relatively easily on short journeys, especially on the 107/110 and 136-140 hp versions. The anti-pollution warning light comes on and, if ignored, the car loses power and may end up needing a new DPF.
- High severityFrequency: Common2.0 Ingenium diéselFuel dilution of the oil linked to particulate filter regenerationsYes: on short trips and in urban use, the Ingenium diesel's particulate filter does not always complete regeneration, and some of the diesel injected to burn off the soot ends up mixing with the engine oil, which reduces its ability to lubricate.
- High severityFrequency: CommonMZR-CDOil dilution from leaking injector seals and DPF regenerationsOn the 2.0 and 2.2 MZR-CD, injector seals that age badly and incomplete particulate filter regenerations on short journeys can let unburnt diesel into the sump, diluting the oil and leaving the engine with less lubrication.
- High severityFrequency: CommonSkyactiv-DOil dilution with diesel during DPF regenerationsOn the Skyactiv-D (1.5, 1.8 and 2.2), particulate filter regenerations can let diesel into the sump and raise the oil level. Mazda accepts some dilution as normal, but on short urban journeys the expected margin can be exceeded and harm the lubrication of the turbo and the camshaft.
Have you had this fault? Your case helps other owners know when it appears and how much it costs. Report your fault in 2 minutes.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- Jeep Compass: problemas, fallos y averías más frecuentesTotalrenting · Other source · consulted 27 September 2026 · in Spanish
- Fiat Doblò: problemas, fallos y averías más frecuentesTotalrenting · Other source · consulted 27 September 2026 · in Spanish