A light comes on in the cluster, it is a colour you would describe as somewhere between yellow and orange, and it is shaped like something. An engine, maybe. A horseshoe with an exclamation point in it. A little car with squiggly lines behind it. The only question that matters in that moment is whether you can keep driving to where you were going, or whether you need to pull over.

The colour answers most of that before you even work out the symbol. This is the plain guide to the lamps on a Ram or Jeep, with every meaning taken from the owner's manual rather than a forum. When a lamp stays on and you want someone to read the code properly, you can book a diagnostic visit online and we will tell you what it is before we touch anything.

Key Takeaways

• The colour is the first answer. Red means a condition that can damage the vehicle or affect safe driving. Yellow or amber means a fault or advisory that needs service. Green, white and blue lamps are just telling you a system is on.
• The engine light on a Ram or Jeep is amber, never red. Solid means book it in. Flashing means a serious condition, and the manual says to have it serviced as soon as possible.
• Three red lamps mean stop soon: oil pressure, engine coolant temperature and the brake warning light. The charging system lamp means get to a shop promptly.
• The exclamation point family is tire pressure (the horseshoe) and the brake system (the circle). They mean very different things.
• On a cold start several lamps light briefly as a check and should go out within seconds. The one that often stays on after a cold night is tire pressure.

Why the Colour Matters More Than the Shape

Ram's owner's manual groups the cluster lamps by colour, and the colour tells you the urgency.

Red lamps are the critical warnings. Something is happening now that can hurt the engine, the brakes or you.

Yellow lamps, which most people call orange or amber, are faults and advisories. Something has been detected and needs to be looked at, but in most cases the truck is safe to drive to a shop.

Green, white and blue lamps are indicators. Your headlights are on, cruise is set, four wheel drive is engaged. Nothing is wrong.

That is why the most searched question about this, "is a yellow check engine light serious," has a calm answer most of the time and an urgent one only when the light is flashing.

The Amber Engine Light

The engine shaped lamp is the Malfunction Indicator Light, usually called the check engine light. On Ram and Jeep vehicles it sits in the yellow group, so it is amber when it lights. A red lamp on these trucks is always one of the stop now warnings below, never the engine light.

Solid amber. The engine computer has stored a fault. It can be as small as a loose fuel cap or as real as a failing sensor. The manual's guidance is that the vehicle should be serviced if the light stays on through several typical drives. You can keep driving, and you should book it in. Our post on what the check engine light means walks through the common causes.

Flashing amber. This is different. The manual says the light may flash to alert serious conditions, and that the vehicle should be serviced by an authorized dealer as soon as possible. A flashing engine light usually means a misfire bad enough to send unburned fuel into the exhaust, which can damage the catalytic converter quickly. Ease off, avoid heavy throttle and towing, and get it to a shop.

A code reader from the parts store will tell you a code, not a cause. We explain the difference in code reader versus dealer diagnosis.

The Red Lamps: Pull Over or Head Straight In

Oil pressure. The oil can shaped lamp. The manual says that if the light and chime come on while driving, safely stop the vehicle and turn off the engine as soon as possible. If it comes back on after a restart, shut it off and call for help. An engine running without oil pressure can be ruined in minutes. This is the one lamp you never drive home on.

Engine coolant temperature. The thermometer in liquid. The manual says to safely pull over and stop, turn off the air conditioning if it is on, and turn the engine off if the temperature does not come back to normal. Do not open a hot radiator or coolant cap.

Brake warning light. The circle with an exclamation point inside it. The manual says it can mean the parking brake is applied, the brake fluid level is low, or there is a problem with the brake system, and that driving with the red brake light on is dangerous. Check the parking brake first. If it is fully released and the lamp stays on, have the truck checked immediately. If the ABS lamp comes on together with it, the manual notes that can point to a brake force distribution fault, which is also an immediate repair.

Charging system. The battery shaped lamp. The manual says it lights when the battery is not charging properly, and that the vehicle should go to an authorized dealer as soon as possible. The truck is now running on what is left in the battery, so skip the errands and drive straight in, with as few electrical loads on as you can manage.

The Exclamation Point Family

Two different lamps share the exclamation point, and people mix them up constantly.

The horseshoe with an exclamation point is tire pressure. It is amber. Solid means at least one tire is below its recommended pressure, and the manual says to stop and check your tires as soon as possible. If it flashes for about a minute at startup and then stays on, the system itself has a fault, often a sensor, rather than a low tire.

The circle with an exclamation point is the brake system, and it is red. See above. They are not interchangeable, and if you are not sure which one you are looking at, treat it as the brake lamp until you know otherwise.

Traction and Stability Lamps

The car with squiggly lines behind it is the Electronic Stability Control lamp. It lights with the ignition as a check, and it flickers while ESC is actively working, which on a snowy corner or a gravel shoulder is exactly what you want it doing. If the ESC lamp stays on continuously with the engine running, the manual says a malfunction has been detected in the system. A separate ESC OFF lamp simply means the system has been switched off, and on these trucks it turns itself back on each time the ignition is cycled.

When the ESC lamp and the engine light come on together, book one visit rather than two. A single fault can light more than one lamp, and the scan tells us which one started it.

Lights on a Minus 30 Start

Turn the key on a cold January morning and the cluster lights up like a Christmas tree for a moment. That is normal. The manual lists several lamps, including the airbag, brake and engine lamps, that come on briefly at start as a bulb check. They should all go out within a few seconds.

The ones worth noticing on a cold morning:

Tire pressure staying on. Very common after the first hard cold snap. Cold air shrinks, pressure drops, and a tire that was right in September can be under the line in November. Set them cold, to the placard on the door jamb, and the lamp goes out.

A charging lamp that lingers. A battery that is struggling in the cold can take its time recovering after a hard start. If the lamp stays on after the engine settles, get the battery and charging system tested. Cold is where a weak battery gives up first.

Anything red that stays on. Cold does not excuse a red lamp. Oil pressure in particular should come up within seconds even at minus 30.

The Message That Is Not a Warning Light

Oil change reminders on current Ram and Jeep vehicles show up as a message in the cluster display, not as the engine lamp. It is a maintenance reminder and nothing is wrong. Our guide to resetting the oil change indicator on a Ram or Jeep covers what it means and how to clear it after the service.

FAQs

Is a yellow check engine light serious?

A solid amber engine light means a fault is stored and the vehicle should be serviced if it stays on through several drives. It is usually safe to drive to a shop. A flashing engine light is serious: the manual says to have it serviced as soon as possible, and continuing to drive hard can damage the catalytic converter.

Why is my check engine light orange and not red?

Because it sits in the yellow group of warning lamps on Ram and Jeep vehicles. Amber means a fault that needs service, not an emergency stop. Red is reserved for conditions like low oil pressure, overheating and brake system faults.

What does the orange exclamation point light mean?

If it sits inside a horseshoe shape, it is the tire pressure lamp. Check your pressures as soon as you can. If it flashes for about a minute and then stays on, the monitoring system has a fault. A red exclamation point in a circle is the brake warning light, which is different and more urgent.

Which dash lights mean I should stop driving?

The red oil pressure lamp and the red engine coolant temperature lamp mean pull over safely and shut the engine off. The red brake lamp, with the parking brake released, means have the truck checked immediately. A flashing amber engine light means ease off and get to a shop as soon as possible.

Why do all my dash lights come on when I start the truck?

It is a bulb check. Several lamps, including the airbag, brake and engine lamps, light briefly at start to show they work and then go out. A lamp that stays on after the engine settles is the one to pay attention to.

Why does my tire pressure light come on when it gets cold?

Cold air takes up less space, so tire pressure drops as the temperature falls. Top the tires up to the pressure on the door jamb placard, checked cold, and the lamp should go out after a short drive.

The Bottom Line

Read the colour first. Red means stop or head straight in. Amber means book it. Green, white and blue mean a system is doing its job. The engine lamp on a Ram or Jeep is amber, and it only becomes urgent when it flashes.

If a lamp is on and you want it read properly, book a diagnostic visit and our service centre will pull the codes, find the cause and tell you what it costs before any work starts. If the fix is a part you would rather install yourself, our parts department will match it to your VIN. And if the lamps are telling you it is time for a different truck, our new Ram 1500 inventory and new Jeep Wrangler inventory are online.

Tyler Dunn, Dunn Ram Trucks, Portage la Prairie