3233218 - Z50 MIXTURE STRENGTH ERROR

The diagnostic equipment signals the following error: Mixture strength
Results of the tests
0PRELIMINARY CHECKSAll OKProblems metOperation
Connect the diagnostic equipment (Examiner or other instrument) and transcribe the errors and environmental parameters.Check for the 'Mixture strength' error onlyEnd of diagnosis'Upstream lambda probe' error present See table   Z56  UPSTREAM LAMBDA SENSOR SIGNAL ERROR
Only the 'Mixture strength', 'Misfire', 'Catalyzer' and/or 'Downstream Lambda signal' errors are present Continue to Step 1
Other errors presentIdentify and eliminate the cause of the problem
1CHECKING SIGNAL PLAUSIBILITYAll OKProblems metOperation
Checking the plausibility of the flow meter signal See Test   1056BX  MAP/flow meter signal plausibility Continue to Step 2 The signal is not plausible Replace the flowmeter Op.   1056B09 
2ERROR DETAIL CHECKAll OKProblems metOperation
Check the detail of the 'Mixture strength' errorEnd of diagnosisThe detail is 'Above the upper limit' See table   Z52  LEAN FUEL SYSTEM Search for the fault starting from another symptom'
The detail is 'Air leaks downstream of flow meter' See table   Z52  LEAN FUEL SYSTEM Search for the fault starting from another symptom'
The detail is 'Below lower limit' See table   Z51  RICH FUEL SYSTEM Search for the fault starting from another symptom'