There is an instance in which there is NO minimum height, and it is important to understand. If your employees are working over dangerous equipment, machinery, or any hazard into which they could fall, they must have fall protection at all times or machine guarding needs to be put into place. No exception.
CATALYTIC CONVERTER FAILURES: If your catalytic converter needs replacing, then it is highly probable that at least one of the six causes below has contributed to its failure. An Oxygen Sensor is Not Functioning Properly. An oxygen sensor failuring can lead to incorrect readings of exhaust gasses.
A problem with the catalytic converter often causes an error code in the vehicle's onboard computer, which illuminates the check-engine light. One method of checking for catalytic converter problems is to remove it to see if the engine continues to backfire. A second method is to disconnect the oxygen sensor. If either solves the performance problems, the converter requires replacement.