Short answer. Arresto menor, or a fine of two thousand to twenty thousand pesos. Article 151 sets that lighter penalty specifically for disobedience to an agent of a person in authority that is not of a serious nature, distinct from the arresto mayor and larger fine reserved for resisting or seriously disobeying.
What the law says
The penalty of arresto mayor and a fine not exceeding One hundred thousand pesos (₱100,000) shall be imposed upon any person who not being included in the provisions of the preceding articles shall resist or seriously disobey any person in authority, or the agents of such person, while engaged in the performance of official duties.
Revised Penal Code, Article 151 — Resistance And Disobedience To Authority. Read the full provision →
What the law says
When the disobedience to an agent of a person in authority is not of a serious nature, the penalty of arresto menor or a fine ranging from Two thousand pesos (₱2,000) to Twenty thousand pesos (₱20,000) shall be imposed upon the offender.
Revised Penal Code, Article 151 — Resistance And Disobedience To Authority. Read the full provision →
The serious offense first
Article 151 begins with the more serious version of this offense. It states that the penalty of arresto mayor and a fine not exceeding One hundred thousand pesos (₱100,000) shall be imposed upon any person who not being included in the provisions of the preceding articles shall resist or seriously disobey any person in authority, or the agents of such person, while engaged in the performance of official duties. This is the baseline penalty for resisting, or seriously disobeying, either a person in authority or that person's agents while they are performing official duties.
The lighter penalty for minor disobedience to an agent
The article then carves out a lighter penalty for exactly your situation. It provides that when the disobedience to an agent of a person in authority is not of a serious nature, the penalty of arresto menor or a fine ranging from Two thousand pesos (₱2,000) to Twenty thousand pesos (₱20,000) shall be imposed upon the offender. So disobedience that falls short of being serious, directed at an agent specifically, draws this reduced penalty instead of the heavier arresto mayor bracket.
The difference between an agent and a person in authority
Notice that this reduced penalty is worded specifically around disobedience to an agent of a person in authority — a police officer typically falls into this category as someone acting on behalf of, or enforcing the authority of, a person in authority. The article does not extend this same lighter treatment to non-serious disobedience directed at a person in authority themselves, only to their agent.
Why the peso figures reflect RA 10951
The peso figures in this article — the ₱100,000 fine ceiling for the serious offense, and the ₱2,000 to ₱20,000 range for minor disobedience — reflect Republic Act No. 10951, enacted in 2017, which revised the fines throughout the Revised Penal Code. Older reproductions of the Code may still show the original, much smaller 1930 figures, so it is worth confirming that any source you consult reflects these current, RA 10951 amounts.