The order in this regard had been issued by the Vigilance Director on the complaint filed by CPI-M MLA V Sivankutty accusing Jacob of indulging in corruption and irregularities in appointments in the state civil supplies corporation.
Sivankutty had alleged that the minister had indulged in corruption to a tune of Rs 36.5 crore.
Jacob is the latest UDF minister to come under the Vigilance probe over corruption charges.
A Vigilance court in Thrissur had ordered similar probes against Chief Minister Oommen Chandy, Power Minister Arayadan Muhammed, State Excise Minister K Babu, Cooperation Minister C N Balakrishnan and former Finance Minister K M Mani over various allegations including in the solar and bar bribery scams.