22 · Diagnostics

Catalyzer error

Make: Fiat
Model: Stilo Factory Service Manual
Year: 2001–2007
Section: Examiner › Catalyzer error

‹ Prev Misfire error in one cylinder Next › Upstream lambda sensor signal error

Fault diagnosisCatalyzer error

CATALYZER ERROR

1.2 16v, 1.6 16v, 1.8 16v, 2.4 20v

The diagnostic equipment signals the following error: Catalyzer

0	PRELIMINARY CHECKS	All OK	Problems met	Operation
		Results of the tests
	Connect the tester (Examiner or Examiner Plus) and transcribe the errors and environmental parameters Check for the 'Catalyzer' error only	End of diagnosis	'Upstream lambda probe' error present	See table Z56
			'Upstream lambda probe' error present	See table Z50
			'Upstream lambda probe' error present	See table Z53
			'Upstream lambda probe' error present	See table Z58
			'Upstream lambda probe' error present	Continue to Step 1
			'Upstream lambda probe' error present	Identify and eliminate the cause of the anomaly. Continue to Step 5
1	EXHAUST SYSTEM LEAKS CHECK	All OK	Problems met	Operation
	Look and listen to check the exhaust system from the cylinder head outlet to the downstream lambda probe. Check that there are no leaks	Continue to Step 2	There are leaks	Restore the exhaust system seal and replace the affected parts if necessary Continue to Step 5
2	ROAD TEST TO CHECK MIXTURE STRENGTH	All OK	Problems met	Operation
1.2 16v 1.6 16v 2.4 20v	Road test the vehicle and check the mixture strength in the 1st and 2nd closed loops using the diagnostic equipment. Check that the activation is correct	Continue to Step 3	The 1st closed loop activation is not correct	See table Z56
1.2 16v 1.6 16v 2.4 20v		Continue to Step 3	The 1st closed loop activation is not correct	See table Z58
1.8 16v	Road test the vehicle and check the mixture strength in the 1st and 2nd closed loops using the diagnostic equipment. Check that the activation is correct	Continue to Step 3	The activation is not correct	See table Z56
3	CHECKING INLET AND EXHAUST SYSTEM SEAL	All OK	Problems met	Operation
	Check the exhaust system visually and by listening, to check that there are no leaks from the cylinder head outlet to the upstream lambda sensor	Continue to Step 4	Seal not correct	Restore system seal and replace the affected parts if necessary Continue to Step 5
4	REPLACING THE CATALYZER	All OK	Problems met	Operation
	Replace the catalyzer Op. 1080B62	Continue to Step 5
5	DELETING AND CHECKING ERROR	All OK	Problems met	Operation
	Use a tester to cancel the errors in the control unit. Carry out a road test and ensure the error does not recur	Continue to Step 6	The fault persists, it is the first time that this step has been reached and the catalyzer has not yet been replaced	Continue to Step 0
		Continue to Step 6	The fault persists, it is the first time that this step has been reached and the catalyzer has not yet been replaced	Contact Technical Support for further information on the problem
6	CHECKING CORRECT OPERATION	All OK	Problems met	Operation
	Check that the fault is no longer present	End of diagnosis

‹ Prev Misfire error in one cylinder Next › Upstream lambda sensor signal error

Parts & tools for this job For 2001 Fiat Stilo

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