The International semi truck instrument cluster provides critical real-time feedback for safe and efficient operation. Designed for durability, these indicators help drivers monitor engine health, emissions systems, and braking performance.
International semi truck Warning Light Symbols
| Symbol | Name | Color | What it means | What to do |
|---|---|---|---|---|
| Check Engine (MIL) | AMBER | The engine control module has detected a fault that may affect emissions or performance on your International. | Have the engine scanned with a diagnostic tool as soon as possible. | |
| Engine Oil Pressure | RED | Low oil pressure detected in your International's engine, risking critical component damage. | Stop the engine immediately and check oil level; if okay, do not restart. | |
| Battery / Charging | RED | The charging system is not supplying proper voltage to the International's battery. | Check alternator belt and connections; have electrical system inspected. | |
| Coolant Temperature | RED | Engine coolant temperature in your International has exceeded safe limits. | Pull over and let engine cool; check coolant level and fan operation. | |
| Brake System | RED | A fault in the brake system of your International, such as low air pressure or hydraulic failure. | Stop safely and do not drive until brakes are inspected. | |
| ABS | AMBER | The anti-lock brake system on your International has a malfunction and may not prevent wheel lock-up. | Service the ABS as soon as possible; standard brakes still work. | |
| Parking Brake | RED | The parking brake is engaged or not fully released on your International. | Release the parking brake fully before moving. | |
| Tire Pressure (TPMS) | AMBER | One or more tires on your International are significantly under-inflated. | Check tire pressures at nearest safe stop; inflate to recommended psi. | |
| DPF / Regeneration | AMBER | The diesel particulate filter on your International requires active regeneration to clean accumulated soot. | Drive at highway speed or perform stationary regen per operator manual. | |
| DEF / AdBlue | AMBER | DEF level is low or quality issue detected in your International's aftertreatment system. | Refill DEF tank with approved fluid; if light persists, check system. | |
| Water in Fuel | AMBER | Water has accumulated in your International's fuel filter/water separator. | Drain the water separator as soon as possible to prevent injector damage. | |
| Low Fuel | AMBER | Fuel level in your International is low; refuel soon to avoid running out. | Refuel at the nearest station. | |
| High Beam | BLUE | The high beam headlights are activated on your International. | Dim when approaching oncoming traffic as required by law. | |
| Reduced Power (Limp Mode) | AMBER | Engine power is limited due to a detected fault to prevent further damage in your International. | Reduce speed and have the vehicle serviced immediately. | |
| Air Filter | AMBER | The engine air filter on your International is restricted and needs replacement. | Replace air filter at earliest convenience. | |
| Service / Hour Meter | AMBER | Scheduled maintenance is due based on engine hours on your International. | Perform required service per maintenance schedule. | |
| Air Brake Pressure (Low) | RED | Air brake system pressure in your International has dropped below safe operating level. | Stop immediately; allow air pressure to build before moving. | |
| Engine / Exhaust Brake | GREEN | The auxiliary braking system (retarder) is active on your International, assisting in slowing down. | No action required; system is operating normally. | |
| Trailer | GREEN | A trailer is properly connected and its electrical system is functioning on your International. | Ensure the trailer is securely coupled before driving. | |
| Door Open | RED | A cab door on your International is not fully closed. | Stop and close all doors securely before moving. |
20 symbols shown. Icons follow ISO 2575 dashboard standards; exact graphics vary by model year.
Most Important Warning Lights
Engine Overheating
Common causes
- Low coolant
- Faulty thermostat
- Clogged radiator
What to do
On your International, pull over immediately, let engine idle with heater on high to aid cooling, then check coolant level and look for leaks. Do not open hot radiator cap.
Low Oil Pressure
Common causes
- Low oil level
- Oil pump failure
- Worn bearings
What to do
Stop the International engine right away. Check dipstick; if low, add oil. If pressure remains low, do not restart; call for service.
Air Brake Failure
Common causes
- Air leak
- Compressor failure
- Brake line damage
What to do
In your International, if low air pressure warning comes on, stop safely while brakes still hold. Wait for pressure to build; if not, do not drive. Inspect for audible leaks.
DEF System Malfunction
Common causes
- Empty DEF tank
- Poor quality DEF
- Faulty DEF pump
What to do
Refill with approved DEF; if light stays on, your International may limit speed. Have the aftertreatment system diagnosed to prevent emissions non-compliance.
Frequently Asked Questions
How do I perform a parked regeneration on my International truck?
Park the truck on a level surface away from combustibles, ensure parking brake is set, engine at idle, then press and hold the regen switch until the DPF light starts flashing. The process takes about 20-40 minutes.
What does the 'Reduced Power' light mean on my International?
It means the engine control module has detected a fault and is limiting power to protect the engine. Common causes include high exhaust temps, fuel system issues, or sensor failures.
Why is my 'Check Engine' light on after refueling?
This can happen if the fuel cap is not tightened properly, causing an evaporative leak. On International trucks, ensure the cap clicks 3-4 times. If light persists, have it scanned.
How often should I drain the water separator on my International?
It is recommended to drain the water separator during every oil change or when the 'Water in Fuel' light comes on. Regular draining prevents injector damage.
What should I do if the ABS light stays on?
The standard brakes still work, but the anti-lock system is impaired. For an International, have the wheel speed sensors and wiring inspected at your earliest convenience to ensure safe braking.
Can I drive with the 'DPF Regen' light flashing?
Yes, but you should drive at highway speeds (above 40 mph) to allow passive regeneration. If the light stays solid, you may need to perform a parked regen. Ignoring it could lead to a clogged filter.