2751145 - 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 Examiner Plus) and record the errors and environmental parameters.Check for the 'Catalyzer' error onlyEnd of diagnosisThe 'Upstream Lambda signal' error is presentSee table   Z56 
The 'Mixture strength' error is presentSee table   Z50 
'Misfire' error presentIdentify and eliminate the cause of the problem.See table   Z53 
The 'Downstream Lambda signal' error is presentSee table   Z58 
The 'Catalyzer' error only is present Continue to Step 1
Other errors are presentIdentify and eliminate the cause of the problem.Continue to Step 5
1EXHAUST SYSTEM LEAKS CHECKAll OKProblems metOperation
Check the exhaust system, visually and by listening, from the cylinder head outlet to the downstream Lambda sensor. Check that there are no leaksContinue to Step 2There are leaksRestore the correct seal for 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 in closed loop. Check that the activation is correctContinue to Step 3The 1st closed loop activation is not correctSee table   Z56 
The 1st closed loop activation is not correctSee table   Z58 
3CHECKING INTAKE 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 4Seal not correctRestore the correct seal for the system, if necessary, replace the components involved. Continue to Step 5
4REPLACING THE CATALYZERAll OKProblems metOperation
Replace the catalyzer Op.   1080B62  Continue to Step 5
5ERROR CANCELLING AND CHECKINGAll OKProblems metOperation
Use a tester to cancel the errors in the control unit.Road test the vehicle and check that the error does not occur againContinue to Step 6The 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 replaced Contact Technical Support for further information on the problem
6Continue as instructed by the testerAll OKProblems metOperation
Check that the fault is no longer presentEnd of diagnosis