Statistics Canada powers manufacturing sales fell 0.2 per cent in September to $57.4 billion, weighed down by a ditch in the petroleum and coal product and the motor vehicle parts industries.
The federal activity says the move lower followed a 0.8 per cent increase in August.
Economists had calculated a decline of 0.6 per cent for September, according to financial markets text firm Refinitiv.
Statistics Canada says sales were down in 10 of 21 works, representing 62.2 per cent of the Canadian manufacturing sector.
Sales in the petroleum and coal outcome industry fell 1.9 per cent, while motor vehicle relinquishes sales fell 4.3 per cent.
Meanwhile, the machinery industry distended 5.5 per cent and motor vehicle sales rose 2.9 per cent to compensate some of the overall decline.