Understanding every symbol on the Ram 2500-3500 dash saves time, money, and, most of all, keeps you and your load safe. A red icon means stop now, amber means visit the workshop soon, and green simply confirms a feature is on. Scan the lists below whenever a new light pops up.
Quick Navigation
Red (Stop Immediately)
Engine Oil Pressure
Red oil can means oil pressure vanished; pull over, shut off, check level, call a tow if still lit.
Engine Coolant Temperature
Thermometer in waves signals overheating; kill the A/C, park, let it cool, top coolant.
Battery Charge
Little battery shows charging system failed; turn off extras and drive straight to service.
Brake System
“BRAKE” stays on when fluid is low or parking brake stuck; park safely and inspect brakes.
Airbag/SRS Fault
Person with circle means bags may not fire; schedule immediate diagnostics.
Seat Belt Reminder
Icon of belted passenger warns belt unlatched while moving; buckle up at once.
Electronic Throttle Control
Lightning bolt signals throttle fault; cycle ignition, then limp to shop if it returns.
Transmission Overheat
Thermometer in gear shows fluid too hot; stop, idle in Neutral, seek repair.
Power Steering Fault
Steering wheel + “!” means assist lost; steering will go heavy—get service fast.
Service 4WD
“SERV 4WD” means transfer-case fault; avoid rough terrain and book repair.
Forward Collision Alert
Red car icon flashes when crash is imminent or sensor fails; brake hard, then inspect.
Hood Ajar
Open-hood symbol glows if latch isn’t secure; stop and shut firmly.
Door Ajar
Car with open door lights up when any door isn’t latched; pull over and close it .
Diesel Particulate Filter Full
Solid DPF icon warns filter clogged; start regen or visit dealer. (*Common on Cummins diesels; not in supplied docs.)
DEF Empty
Red DEF gauge shows fluid depleted; truck may limit power—refill immediately. (*Diesel feature; not in supplied docs.)
Yellow / Amber (Action Required Soon)
Check Engine (MIL)
Engine outline flags emissions or sensor issues; schedule scan soon.
ABS
“ABS” inside circle notes anti-lock fault; brakes work but may lock on a skid, see tech.
Tire Pressure (TPMS)
Horseshoe + “!” means at least one tyre low; inflate to spec.
Traction Control Active
Car with squiggles blinks during wheel slip; if steady, system fault—inspect.
ESC Fault
ESC light stays on when stability control is disabled or failed; drive with care, repair.
Air Suspension Fault
Truck + “!” appears when air bags fail; ride height may drop—service soon.
LaneSense Service
Lane icon lights if camera or software glitches; system off until fixed.
Glow Plug Preheat
Coil symbol shows plugs warming; wait for it to vanish before starting.
Rain/Light Sensor Fault
Windshield icon means auto wipers or lights offline; switch to manual control.
ParkSense Fault
“P” with cones signals parking sensors blocked or faulty; clean or service.
Auto Stop/Start Not Ready
A with arrow, struck out, shows system disabled by load or temp; no action needed unless persistent.
Trailer Brake Fault
Trailer + “!” means controller lost connection; inspect plug and wiring.
Green / Blue (Information Only)
Adaptive Cruise On
Radar speedometer confirms system active and matching traffic.
ECO Mode
Leaf icon shows fuel-saving maps engaged.
Front Fog Lights
Lamp with wavy line tells fogs are lit.
4WD Auto Engaged
“4WD AUTO” confirms automatic four-wheel drive in use.
High Beam
Blue headlamp icon signals brights on—dim for oncoming traffic.
Low Beam
Green lamp icon means dipped beams selected.
Left/Right Turn
Arrow flashes with indicators; rapid blink hints blown bulb .
Hazard Flasher
Both arrows blink when hazards engaged; use when stopped roadside.
Tow/Haul Mode
“Tow/Haul” reminds shift logic optimised for heavy loads.
Cruise Control Set
Speedometer + arrow shows constant speed locked.
Hill Descent Control
Truck on slope icon lights when downhill speed assist is ready
Headlights Auto
“A” inside headlamp shows automatic high-beam or auto-light mode enabled.
