Fiat 940A5000 1.6 MultiJet Injector Problems: Symptoms & Repair (UK)
Updated for 2026 diagnostics & repair guidance
Shared across Fiat, Alfa Romeo, and Jeep brands.
The 1.6 MultiJet II is Fiat Group's mid-range diesel, found in the Alfa Giulietta, Fiat Tipo/Bravo, and Jeep Renegade. Uses Bosch solenoid injectors. A refined engine but requires injector attention at higher mileage.
- OEM Tested
- 12-Month Warranty
- Free UK Delivery
Drivers also ask
Quick Diagnosis
If your 940A5000 engine shows:
- rough idle
- hard starting
- white or black smoke
- knocking or ticking noise
- reduced fuel economy
A faulty injector may be the cause. Continue below to confirm symptoms and solutions.
Can You Drive With This Problem?
Driving short distances may be possible, but continued use can cause:
- piston damage
- turbo contamination
- fuel dilution of engine oil
- catalytic converter damage
Prolonged driving may lead to major engine failure.
Typical Repair Costs (UK)
Average costs for injector-related repairs:
£180 - £350
Per Injector
£700 - £1,200
Full Set (4)
£120 - £300
Labour
Early replacement prevents costly engine damage.
Common Injector Failure Symptoms
Owners frequently report:
Rough idle
Injector imbalance causes uneven running.
DPF regeneration problems
Poor combustion overloads the DPF.
Engine management light
Injector and emissions fault codes.
Fault Codes Linked to Injector Issues
Common diagnostic codes include:
How to Diagnose 940A5000 Injector Faults
Follow this step-by-step testing approach to identify the faulty injector:
- 1
Read fault codes
Connect an OBD-II scanner and note any injector-related codes (P0201–P0204, P2146, P2149). This identifies which cylinder is affected.
- 2
Perform a leak-off test
Disconnect the fuel return pipes and route into measuring containers. Run the engine at idle for 60 seconds. Compare volumes per cylinder against manufacturer spec.
- 3
Listen for injector tick
Use a mechanic's stethoscope on each injector body. A dead or irregular tick indicates a stuck or failing solenoid.
- 4
Check fuel rail pressure
Monitor live fuel rail pressure data via diagnostic tool. Low pressure can mimic injector symptoms and may indicate a fuel pump issue instead.
- 5
Inspect for external leaks
Check around injector seals for signs of fuel or combustion gas leakage. Black carbon deposits indicate a blown seal.
- 6
Cylinder balance test
Use diagnostic software to run a cylinder contribution test. This electronically disables each injector in turn to measure its effect on engine speed.
Why 940A5000 Injectors Fail
Common causes include:
- fuel contamination
- high-pressure wear cycles
- carbon buildup
- poor fuel quality
- internal valve wear
Professional remanufacturing restores spray pattern and pressure accuracy.
When Replacement Is Required
Injector replacement is recommended if:
- leak-off test fails
- misfire persists after coding
- excessive return flow detected
- spray pattern fails testing
- vehicle enters limp mode
940A5000 Repair Advice
Uses Bosch solenoid injectors with IMA coding via MultiECUScan or compatible FCA diagnostic tool.
Remanufactured (Recommended)
OEM-spec rebuild with new nozzles, seals, and solenoids. Full flow testing. 12-month warranty. 40–60% less than new.
Brand New OEM
Factory-fresh from Bosch, Delphi, or Siemens. Highest cost but zero previous wear. Best for low-mileage vehicles.
Vehicles Using the 940A5000 Engine
This engine is commonly found in:
Professional Installation Tip
Always:
- replace copper sealing washers
- torque injectors to manufacturer specification
- clean injector seats before installation
- code injectors after installation (if required)
Compatible Injector Part Numbers for 940A5000
The following injector part numbers are commonly associated with 940A5000 engines:
940A5000 Injectors — Shop Now
In-stock injectors listed first for fastest delivery:
FIAT BRAVO ( Bravo Sport MultiJet 150 198) 1.9L 2007-2010 Diesel Injector
£100.00FIAT BRAVO ( Bravo Dynamic MultiJet 120 198) 1.9L 2007-2010 Diesel Injector
£100.00FIAT BRAVO ( Bravo Sport MultiJet 165 198) 2L 2008-2011 Diesel Injector
£100.00FIAT BRAVO ( Bravo Active MultiJet 120 198) 1.9L 2007-2009 Diesel Injector
£100.00FIAT BRAVO ( Bravo Dynamic MultiJet 165 198) 2L 2008-2010 Diesel Injector
£100.00FIAT BRAVO ( Bravo Dynamic MultiJet 150 198) 1.9L 2007-2010 Diesel Injector
£100.00FIAT 500L ( 500L Trekking MultiJet 351) 1.6L 2013-2016 Diesel Injector
£179.90FIAT 500L ( 500L Lounge MultiJet 351) 1.6L 2013-2015 Diesel Injector
£179.90These injectors are commonly used with the 940A5000 engine. Confirm compatibility using your engine code or registration lookup before ordering. Our team can verify the correct part for your specific vehicle.
Helpful Guides
Find Your Exact 940A5000 Injector
Three quick ways to confirm the right part:
Not sure which injector? Call us on 020 3355 6581.
Frequently Asked Questions
Related Guides
Injector Symptoms
Spot the warning signs of a failing diesel injector
Injector Fault Codes
P0201–P0204 injector circuit codes explained
Smoke Diagnosis
White & blue smoke causes and fixes
Injector Testing
Leak-off & bench testing methods
Replacement Cost
UK parts + labour cost breakdown
Misfire Diagnosis
Why injectors cause rough running & misfires
Related Engine Problems
Other Engine Guides
OM651
Mercedes-Benz
N47
BMW
B47
BMW
Transit 2.2 TDCi
Ford
DW10C
PSA Group (Peugeot/Citroen)
CAYC
Volkswagen Group (VW/Audi/SEAT/Skoda)
OM642
Mercedes-Benz
OM611
Mercedes-Benz
OM654
Mercedes-Benz
OM646
Mercedes-Benz
M47
BMW
M57
BMW
N57
BMW
B57
BMW
BKD
Volkswagen Group
CBAB
Volkswagen Group
CFFB
Volkswagen Group
CLHA
Volkswagen Group
BXE
Volkswagen Group
QYBA
Ford
TXDB
Ford
UFDB
Ford
DV6TED4
PSA Group
DV6C
PSA Group
DW12
PSA Group
K9K700
Renault/Nissan
R9M
Renault/Nissan
M9R
Renault/Nissan
2AD-FTV
Toyota
1CD-FTV
Toyota
2GD-FTV
Toyota
Z19DTH
Vauxhall/Opel
A20DTH
Vauxhall/Opel
224DT
Land Rover
306DT
Land Rover/Jaguar
204DTA
Jaguar Land Rover
D4FB
Hyundai/Kia
D4HA
Hyundai/Kia
199A3000
Fiat