22 · Diagnostics

Excessive exhaust fumes

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Emissions › Excessive exhaust fumes

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Fault diagnosisExcessive exhaust fumes

EXCESSIVE EXHAUST FUMES

1.3 Multijet

High exhaust fume levels are noted, with dense fumes and more particulate than specified

0		All OK	Problems encountered	Operation
		Test results
	Check engine oil level. Check air filter condition.	Move on to Step 1	Excessive oil level	Restore correct oil level
	Check engine oil level. Check air filter condition.	Move on to Step 1	Filter element dirty or damaged	Replace the filter element Op. 1048A14 AIR CLEANER FILTER ELEMENT - REPLACE.
1		All OK	Problems encountered	Operation
	Connect the diagnostic equipment (Examiner or other instruments) to the diagnostic socket and check that there are no errors present in the engine management control unit.	Move on to Step 2	Error detected.	Continue following the instructions given by the diagnostic equipment.
		Move on to Step 2	No dialogue with the engine management control unit.	Restore the correct connection between the engine management control unit and the diagnostic socket See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT
2	BLOW-BY CIRCUIT CHECK	All OK	Problems encountered	Operation
	Check the condition of the blow-by gas intake circuit. In particular check that there are no obstructions in the separator or in the pipes.	Move on to Step 3	Fault detected in the blow-by circuit	Restore circuit to working order: replace the pipes if necessary
		Move on to Step 3	Fault in the separator.	Replace the separator Op. 1080D34 ENGINE OIL VAPOUR SEPARATOR - R + R
3		All OK	Problems encountered	Operation
	Check the condition and seal of the air intake circuit: in particular, check for oil in the pipes.	Move on to Step 4	Circuit component damaged	Replace the damaged component
		Move on to Step 4	Oil in the intake pipes.	Clean the pipes (check source of oil)
4		All OK	Problems encountered	Operation
	Check EGR valve operation	Move on to Step 5	EGR valve operation faulty.	Replace the EGR valve Op. 1080C24 E.G.R. SYSTEM SOLENOID - R + R
5		All OK	Problems encountered	Operation
	Carry out cylinder compression test	Move on to Step 7	Cylinder compression insufficient.	Move on to Step 6
6	CHECK ON CAUSE OF INSUFFICIENT COMPRESSION	All OK	Problems encountered	Operation
	R.R. head to check the valve seal Check condition of cylinders/piston rings	Move on to Step 7	Valve seal insufficient.	Overhaul the head Op. 1016E10 SINGLE CYLINDER HEAD, REMOVED - OVERHAUL
7	CORRECT OPERATION CHECK	All OK	Problems encountered	Operation
	Check that the fault is no longer present.	End of diagnosis	The fault persists.	Contact technical service for further information on the problem.

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Parts & tools for this job For 2007 Fiat 500

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