P059F: Active grille air shutter system fault: the movable shutters behind the grille are not moving or reporting as expected

Active Grille Air Shutter System Performance

Severity: Inspect soon

The shutters close to save fuel and open to cool the engine, so a shutter stuck closed can raise engine temperature. GM says the cause is often ice, snow or an obstruction and not a failed part, but it is worth checking soon.

It gets more serious if:

Stop: Stop driving if the temperature gauge climbs or the engine overheats, since a shutter stuck closed can block airflow to the radiator.

Source: how we rate severity

P059F in short

P059F means the computer found a fault in the active grille shutter system, the motorized louvers behind the front grille. GM and Ford bulletins point to ice or snow in the shutters, water in the connector, or a rubbed harness before a failed actuator. Check the temperature gauge, since stuck-closed shutters can cause overheating.

Some vehicles have motorized shutters behind the grille. They close at highway speed to cut drag and open when the engine or air conditioning needs cooling air. The computer commands them and watches for position feedback.

P059F sets when the shutters do not move or report as commanded. GM tells technicians on the 2015 Colorado and Canyon not to replace parts for P059F first, because it is often an obstruction such as ice or snow. Other bulletins name a misplaced baffle (2013 ATS), water in connectors (2017 C-MAX) and a harness rubbing the shutter assembly (2014 Spark).

Because a shutter stuck closed can restrict cooling airflow, watch the temperature gauge until it is fixed.

Most likely causes

Cause 1: Ice, snow, debris or a misplaced baffle blocking the shutters
Supported by vehicle data
Why it ranks here
GM PIT5364 says P059F on the 2015 Colorado and Canyon is often an obstruction such as ice or snow, and GM PIC5765 covers a close-out baffle that needed repositioning on the 2013 ATS.
What would change this
Rises if the code appears in freezing weather or after the front end was worked on, and clears once the shutters move freely. Falls if the shutters are clear and still do not move.
Cause 2: Water in the shutter actuator or harness connector
Supported by vehicle data
Why it ranks here
Ford SSM 46857 names water in connector C1651 and the shutter actuator connector on the 2017 C-MAX.
What would change this
Rises if the connector is wet or corroded. Falls if connectors are clean and dry.
Cause 3: Harness rubbing or damaged on the shutter assembly
Supported by vehicle data
Why it ranks here
GM PI1032 describes the harness rubbing on the air shutter assembly on the 2014 Spark, and PIC5765 tells technicians to check the forward harness on the ATS.
What would change this
Rises if the insulation is worn through. Falls if the harness is intact and clear of moving parts.
Cause 4: Failed shutter actuator or control module
Possible — needs testing
Why it ranks here
KBB lists a damaged shutter, actuator or control module as generic causes, but the bulletins above point to simpler causes first.
What would change this
Rises only after obstruction, connectors and harness all check out.

What to test first

Start at step 1. Each result tells you what it means and where to go next.

Step 1: With the engine off, look through the grille at the shutters for ice, snow, leaves, road debris or a bent baffle, and try to move them gently by hand only if the vehicle is off and cool.
Low risk
- IfIce, debris or a displaced baffle is found
  It meansClear it, clear the code and see if it returns.
  Points to: Ice, snow, debris or a misplaced baffle blocking the shutters
- IfThe shutters are clear
  It meansCheck the connectors and harness.
  Go to step 2
Step 2: Inspect the shutter actuator connector and the harness nearby for water, corrosion, rubbing or cuts.
Low risk
- IfWater or corrosion is found
  It meansThe connector is the likely cause.
  Points to: Water in the shutter actuator or harness connector
- IfInsulation is worn through where it touches the shutter
  It meansThe harness is the likely cause.
  Points to: Harness rubbing or damaged on the shutter assembly
- IfConnector and harness are fine
  It meansHave the actuator tested with a scan tool.
  Go to step 3
Step 3: Command the shutters open and closed with a bidirectional scan tool and watch whether they move and report back.
Best left to a shopTool: bidirectional scan tool
Warning:Keep hands and tools clear of the shutters and cooling fan while commanding them with the engine on.
- IfThe shutters do not move or report position
  It meansThe actuator or its control is suspect.
  Points to: Failed shutter actuator or control module
- IfThey move normally
  It meansThe fault may be intermittent; recheck obstruction and connectors.
  Go to step 1

Symptoms

Check engine light on
Poorer highway fuel economy
Higher than normal temperature gauge reading Gets more serious: stop and have it checked.

How to fix

Step 1: With the engine off and cool, look through the grille for ice, snow or debris blocking the shutters and clear it.
Step 2: Watch the temperature gauge, and have the shutter system checked if the engine runs hot.

Parts and cost context

Engine control module (ECM / PCM):Bulletins point to obstruction, connectors and wiring before the actuator, so confirm the cause first. Labor varies; get a quote.

Labor varies by vehicle and shop; get a quote before you approve a repair.

Compare used part prices on PartPriceGuide

On your vehicle

Chevrolet

2014–2015 · Colorado
Supported by vehicle data
GM bulletins name ice or snow in the shutters (2015 Colorado) and a harness rubbing on the air shutter assembly (2014 Spark). Whether they are still current is not verified.

PIT5364Status unverified
P059F: do not replace parts, often an obstruction such as ice or snow
2015colorado · NHTSA 10095358
GM tells technicians not to replace parts for P059F; the code is often an indicator of an obstruction in the shutter such as ice or snow.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.
PI1032Status unverified
P059F: harness rubbing on the air shutter assembly
2014spark · NHTSA 10052824
The harness rubs on the air shutter assembly; the NHTSA summary does not give the repair steps.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Cadillac

2013 · ATS
Supported by vehicle data
GM PIC5765 covers P059F on the 2013 ATS: reposition the upper close-out baffle and check the forward harness. Whether it is still current is not verified.

PIC5765Status unverified
P059F: reposition the upper close-out baffle and check the forward harness
2013ats · NHTSA 10112499
Reposition the upper close-out baffle and check the forward harness. The NHTSA summary is short.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Ford

2017 · C-Max
Supported by vehicle data
Ford SSM 46857 covers P059F on the 2017 C-MAX with water in the actuator connectors. Whether it is still current is not verified.

SSM 46857Status unverified
P059F: water in connector C1651 and the shutter actuator connector
2017c-max · NHTSA 10125076
Water in the connectors is the suspected cause; the NHTSA summary does not give the full repair.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

Nissan

2014 · Versa
Supported by vehicle data
Nissan bulletin NTB14-009 covers a MIL with P059F on the 2014 Versa. Whether it is still current is not verified.

NTB14-009Status unverified
MIL with P059F
2014versa · NHTSA 10054917
Nissan bulletin for a malfunction indicator lamp with P059F stored. The NHTSA summary does not give the repair.
We couldn't confirm whether this bulletin is still current, so it doesn't count as confirmation.

No curated relationships for P059F yet.

All Engine cooling (thermostat) codes

P059F questions

Can snow really set P059F?

Yes. GM says the code is often caused by an obstruction such as ice or snow in the shutters on the 2015 Colorado and Canyon. Clear the front end and see if the code returns.

Is it safe to drive with P059F?

Usually for a short time, but watch the temperature gauge. Shutters stuck closed can reduce cooling airflow, so stop if the engine runs hot.

Sources and review

P059F Code: Active Grille Air Shutter System — Kelley Blue Book
GM PIT5364: P059F on 2015 Colorado and Canyon (do not replace parts; check the grille shutter for ice, snow or obstruction) — General Motors / NHTSA
GM PIC5765: P059F on 2013 Cadillac ATS (reposition upper close-out baffle, check forward harness) — General Motors / NHTSA
Ford SSM 46857: P059F on 2017 C-MAX (water in connector C1651 and the shutter actuator connector) — Ford Motor Company / NHTSA
GM PI1032: P059F on 2014 Spark (harness rubbing on the air shutter assembly) — General Motors / NHTSA
Nissan NTB14-009: MIL with P059F on 2014 Versa — Nissan / NHTSA

Last reviewed: October 15, 2026
Written by: Saurabh K.
Editorial review: Pending
Technician review: Technician review pending

This page explains what a code usually means; it is not a substitute for a professional inspection. How we source and review · Report an error

Severity: Inspect soon

Most likely causes

Cause 1: Ice, snow, debris or a misplaced baffle blocking the shutters

Cause 2: Water in the shutter actuator or harness connector

Cause 3: Harness rubbing or damaged on the shutter assembly

Cause 4: Failed shutter actuator or control module

What to test first

Step 1: With the engine off, look through the grille at the shutters for ice, snow, leaves, road debris or a bent baffle, and try to move them gently by hand only if the vehicle is off and cool.

Step 2: Inspect the shutter actuator connector and the harness nearby for water, corrosion, rubbing or cuts.

Step 3: Command the shutters open and closed with a bidirectional scan tool and watch whether they move and report back.

Symptoms

How to fix

Parts and cost context

On your vehicle

ChevroletYour car

CadillacYour car

FordYour car

NissanYour car

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