Quote:
17549 - Load Calculation Cross Check: Implausible Value
P1141 - 35-00 - -
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This would normally be MAF, throttle body or vaccum leak.
In your case when fault affects one side of engine I would suggest valve timing issue with one side getting considerably more air then other. Check measuring blocks for lambda control, difference between banks should not be more then 4%. If it's something like +10% one side and -10% other side then it's definitely valve timing issue.