3233223 - Z55 CATALYZER ERROR

The diagnostic equipment signals the following error: Catalyzer
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instruments) and transcribe the errors and environmental parameters.Check for the 'Catalyzer' error onlyEnd of diagnosis'Upstream lambda probe' error present See table   Z56  UPSTREAM LAMBDA SENSOR SIGNAL ERROR
'Mixture concentration' error present See table   Z50  MIXTURE STRENGTH ERROR
The 'Misfire' error is present See table   Z53  MISFIRE ERROR
The 'Downstream Lambda signal' error is present See table   Z58  DOWNSTREAM LAMBDA SENSOR SIGNAL ERROR
The 'Catalyzer' error only is present Continue to Step 1
Other errors presentIdentify and eliminate the cause of the problem Continue to Step 5
1EXHAUST SYSTEM LEAKS CHECKAll OKProblems metOperation
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 leaksEliminate the leaks from the exhaust system, if necessary, replace the components involved Continue to Step 5
2ROAD TEST TO CHECK MIXTURE STRENGTHAll OKProblems metOperation
Road test the vehicle and check with the diagnostic equipment the status of the mixture strength check in 1st and 2nd loop in closed loop. Check that the activation is correct Continue to Step 3 Correct activation does not take place in 1st loop See table   Z56  UPSTREAM LAMBDA SENSOR SIGNAL ERROR
Correct activation does not take place in 2nd loop See table   Z58  DOWNSTREAM LAMBDA SENSOR SIGNAL ERROR
3CHECKING INLET AND EXHAUST SYSTEM SEALAll OKProblems metOperation
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 correctRestore the correct seal for the exhaust system, if necessary, replace the components involved Continue to Step 5
4REPLACING THE CATALYZERAll OKProblems metOperation
Replace the catalyzer Continue to Step 5 -
5DELETING AND CHECKING ERRORAll OKProblems metOperation
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
The fault persists, but it is the second time that this step has been reached or the catalyzer has already been replacedContact Technical Support for further information on the problem
6CHECKING CORRECT OPERATIONAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosisFault persistsSearch for the fault starting from another symptom'