Jeep Grand Cherokee 2021–2025 — technical service bulletin

Bulletin 9100502 · NHTSA communication 11015309 · issued Mar 4, 2025

Technical service bulletin

communication type

Structure

component

2021–2025

model years

vehicle entries

Official summary

LOWER ACTIVE GRILL SHUTTER If the upper or lower AGS seems to be inop please make sure you CLEAR the DTCs BEFORE swapping the old AGS for a new one, and test if the error code returns. Very often the wiring harness presents corrosion, so make sure to check it for any damage BEFORE swapping the AGS. Corrosion in the harness disrupts communication with the AGS, which sets up the DTCs for AGS performance and lights the CEL. If the AGS is inop and it will be replaced and sent back to Stellantis also send back the wiring harness with it. Make sure to fully perform the PRE-DIAGNOSTIC TROUBLESHOOTING

Vehicles covered

What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.