Fault Family System: Powertrain (P-Codes) 27 SAE Codes

Active Grille Shutter Actuator Circuit

Diagnostic & Technical Explanation

Code P059F (Active Grille Air Shutter A Performance/Stuck Off) sets when the ECM detects an open circuit, out-of-range voltage, a stuck-on/stuck-off condition, or an over-temperature fault while driving an active grille air shutter (AGS) motor or its supply voltage feed. Causes are a seized shutter motor, ice/debris mechanically jamming the louvers, a blown fuse or failed relay, or damaged control/supply wiring.

These 27 diagnostic trouble codes share one detection mechanism and one repair path, which is why MechanicDB groups them into a single authored fault family rather than repeating the same explanation 27 times.

Codes in this family (27)

Code	Definition	Repair coverage
P059F	Active Grille Air Shutter A Performance/Stuck Off	4 ranked fixes
P05A0	Active Grille Air Shutter A Stuck On	4 ranked fixes
P05A2	Active Grille Air Shutter A Control Circuit/Open	4 ranked fixes
P05A3	Active Grille Air Shutter A Control Circuit Range/Performance	4 ranked fixes
P05A4	Active Grille Air Shutter A Control Circuit High	4 ranked fixes
P05A5	Active Grille Air Shutter A Control Circuit Low	4 ranked fixes
P05A6	Active Grille Air Shutter A Supply Voltage Circuit/Open	4 ranked fixes
P05A7	Active Grille Air Shutter A Supply Voltage Circuit Low	4 ranked fixes
P05A8	Active Grille Air Shutter A Supply Voltage Circuit High	4 ranked fixes
P05AE	Active Grille Air Shutter B Performance/Stuck Off	4 ranked fixes
P05AF	Active Grille Air Shutter B Stuck On	4 ranked fixes
P05B1	Active Grille Air Shutter B Control Circuit/Open	4 ranked fixes
P05B2	Active Grille Air Shutter B Control Circuit Range/Performance	4 ranked fixes
P05B3	Active Grille Air Shutter B Control Circuit High	4 ranked fixes
P05B4	Active Grille Air Shutter B Control Circuit Low	4 ranked fixes
P05B5	Active Grille Air Shutter B Supply Voltage Circuit/Open	4 ranked fixes
P05B6	Active Grille Air Shutter B Supply Voltage Circuit Low	4 ranked fixes
P05B7	Active Grille Air Shutter B Supply Voltage Circuit High	4 ranked fixes
P05C0	Active Grille Air Shutter Module A Over Temperature	4 ranked fixes
P05C1	Active Grille Air Shutter Module B Over Temperature	4 ranked fixes
P05FE	Active Grille Air Shutter C Performance/Stuck Off	4 ranked fixes
P2C73	Active Grille Air Shutter C Stuck On	4 ranked fixes
P2C74	Active Grille Air Shutter C Control Circuit Range/Performance	4 ranked fixes
P2C75	Active Grille Air Shutter Module C Over Temperature	4 ranked fixes
P2C76	Active Grille Air Shutter D Stuck On	4 ranked fixes
P2C77	Active Grille Air Shutter D Control Circuit Range/Performance	4 ranked fixes
P2C78	Active Grille Air Shutter Module D Over Temperature	4 ranked fixes

What this page does not show

This page publishes the fault mechanism and the code index. The licensed dataset adds, for every one of the 15,886 codes, the full authored repair set (56,729 procedures in total) with the fields deliberately withheld here:

Procedures 2..n after the first-listed procedure
Aftermarket parts cost ranges in USD (est_parts_cost_min/max_usd)
Professional labor-hour estimates (est_labor_hours)
Step-by-step diagnostic and repair instructions
Replacement-part mappings and catalog lookups
6,637 manufacturer-specific OEM codes across 32 makes ($149 tier)

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