Más vale que no pisemos el pedal de control.

Más vale que is a fixed expression meaning something like it’s better that..., we’d better..., or it’s best that....

In this sentence, it introduces a recommendation or warning:

• Más vale que no pisemos... = We’d better not step on...

A useful way to think about it is:

• más vale + infinitive → more general
• más vale que + subjunctive → more specific, often aimed at a particular person or group

So here, más vale que sets up the idea that what follows is the advisable thing to do.

Because más vale que is normally followed by the subjunctive.

• pisamos = present indicative (we step / we are stepping)
• pisemos = present subjunctive (that we step)

After expressions of advice, preference, warning, or evaluation like más vale que, Spanish uses the subjunctive because the action is not being presented as a simple fact. It is being presented as something desirable or advisable.

So:

• Más vale que no pisemos el pedal de control.
  = We’d better not step on the control pedal.

Pisemos is the 1st person plural present subjunctive of pisar.

From pisar:

• yo pise
• tú pises
• él/ella pise
• nosotros pisemos
• vosotros piséis
• ellos pisen

Here it means we step in a subjunctive sense, so in context:

• que no pisemos = that we not step on it / that we’d better not step on it

In Spanish, no normally goes directly before the conjugated verb.

So:

• no pisemos = let’s not step / that we not step

That is why the negative part appears here:

• Más vale que no pisemos...

not after the verb.

This is very standard Spanish word order.

Because Spanish often leaves out subject pronouns when the verb ending already makes the subject clear.

• pisemos already tells you the subject is we
• so nosotros is unnecessary

You could say:

• Más vale que nosotros no pisemos el pedal de control

but that would usually sound more marked or emphatic, as if you were contrasting we with someone else.

In normal speech, Spanish prefers:

• Más vale que no pisemos el pedal de control

Pisar literally means to step on or to tread on.

With things like pedals, it is a very natural verb in Spanish:

• pisar el freno = step on the brake
• pisar el acelerador = step on the accelerator

So pisar el pedal de control means physically pressing it with the foot by stepping on it.

Depending on context, English might say press instead of step on, but in Spanish pisar is a normal and idiomatic choice for pedals.

Yes, you can.

• Más vale no pisar el pedal de control
• Más vale que no pisemos el pedal de control

Both are possible, but they are structured differently.

Más vale + infinitive

• more general
• less tied to a specific subject
• similar to It’s better not to step on the control pedal

Más vale que + subjunctive

• more explicitly directed at a person or group
• here, specifically we
• similar to We’d better not step on the control pedal

So the original sentence is more personal and specific because it includes pisemos = we.

Not usually in this expression.

Más vale is a set phrase. It commonly means it’s better or it’s best in warnings and advice:

• Más vale que esperemos.
• Más vale callarse.

If you say vale más, it can sometimes be understood literally as is worth more, which is a different idea.

So for this kind of advice/warning expression, learners should treat más vale as the normal form.

Not exactly a direct command, but it is close to a warning or strong advice.

Compare:

• No pisemos el pedal de control.
  = Let’s not step on the control pedal.
• Más vale que no pisemos el pedal de control.
  = We’d better not step on the control pedal.

Adding más vale que makes it sound like there could be a bad consequence if you do it. So it carries more caution than a simple suggestion.

Because pedal de control is a specific noun phrase, and Spanish often uses the definite article where English may or may not use one.

• el pedal de control = the control pedal

In context, this usually refers to a particular pedal already known in the situation.

Also, after verbs like pisar, using the definite article is very common with concrete objects:

• pisar el freno
• pisar el acelerador
• pisar el pedal

You would change the subjunctive form depending on who you is.

For informal singular you:

• Más vale que no pises el pedal de control.

For formal singular you:

• Más vale que no pise el pedal de control.

For plural you in Spain (vosotros):

• Más vale que no piséis el pedal de control.

For plural you in a formal sense:

• Más vale que no pisen el pedal de control.

The structure stays the same; only the subjunctive verb changes.