Complete Dashboard Warning Lights Guide: All Brands Explained

By the CarsDailyHub Editorial Team | Automotive writers; every article fact-checked against manufacturer owner’s manuals and OEM service documentation | Updated June 2026

Quick Answer: All vehicle dashboard warning lights follow the same three-tier color system: red means stop driving immediately, amber/yellow means diagnose soon, and green/blue means informational. This guide covers dashboard symbols for Caterpillar equipment, Nissan Titan, Ford Edge/Explorer/Fusion, Toyota Hilux/Corolla, Mazda 6, Suzuki Swift, and general Ford and Nissan symbols. Always check your owner’s manual for model-specific details.

This guide covers dashboard warning symbols across multiple vehicle brands and equipment types. Last reviewed: June 2026.

Universal Color Logic (Applies to All Brands)
Caterpillar Warning Symbols
Nissan Dashboard Symbols (Titan, General)
Ford Dashboard Symbols (Edge, Explorer, Fusion, General)
Toyota Dashboard Symbols (Hilux, Corolla)
Mazda 6 Dashboard Symbols
Suzuki Swift Dashboard Symbols
What to Do When a Light Comes On (All Brands)
Cost to Diagnose Dashboard Lights
Frequently Asked Questions
Sources & References

Universal Color Logic (Applies to All Brands)

Every vehicle manufacturer uses the same three-tier color system:

Red = danger. Something is actively failing or about to cause damage. Pull over safely and stop the engine.
Amber/Yellow = caution. A system needs attention but the vehicle is still drivable. Schedule diagnosis within a few days.
Green/Blue = informational. A feature is switched on. No action needed.

A flashing amber light is more urgent than a steady one. A flashing check engine light means an active misfire that can damage the catalytic converter in minutes.

Caterpillar Warning Symbols

Caterpillar equipment (dump trucks, excavators, loaders) uses a different symbol set than passenger vehicles. Key symbols:

Symbol	Name	Color	Meaning	Action
Engine icon	Engine System	Red/Amber	Engine fault	Red: stop. Amber: diagnose
Oil can	Engine Oil Pressure	Red	Low oil pressure	Stop immediately
Thermometer	Coolant Temperature	Red	Overheating	Stop, let cool
Battery	Charging System	Red	Alternator failure	Stop, check belts
DEF fluid	DEF Low	Amber	Diesel exhaust fluid low	Refill DEF
Emission fault	Emission System	Amber	Emissions system fault	Diagnose soon
Brake icon	Brake System	Red	Brake fault or low pressure	Stop, check brake fluid
Hydraulic icon	Hydraulic System	Red/Amber	Hydraulic pressure fault	Red: stop. Amber: diagnose
Parking brake	Parking Brake	Red	Parking brake engaged	Release
Filter icon	Filter Restriction	Amber	Air filter or oil filter clogged	Check and replace filter

Caterpillar-specific note: Caterpillar equipment often has multiple warning levels. Level 1 (amber) means service soon. Level 2 (red, flashing) means stop operating immediately to prevent damage. Level 3 (red, solid with alarm) means shut down the engine now.

Nissan Dashboard Symbols (Titan, General)

Nissan uses standard automotive symbols across all models (Titan, Rogue, Qashqai, Altima). Key symbols:

Symbol	Name	Color	Meaning	Action
Engine icon	Engine Malfunction	Red/Amber	Engine fault	Red: stop. Amber: diagnose
Oil can	Oil Pressure	Red	Low oil pressure	Stop immediately
(!) circle	Brake System	Red	Brake fault	Check fluid, tow if needed
Battery	Charging System	Red	Alternator failure	Drive to shop
ABS	Anti-Lock Brakes	Amber	ABS disabled	Drive carefully to shop
Tire !	TPMS	Amber	Low tire pressure	Check tires
Airbag	SRS	Amber	Airbag fault	Schedule dealer diagnosis
Key icon	Key System	Amber	Key not detected	Replace key battery
AWD icon	AWD Warning	Amber	AWD coupling overheating	Stop, let cool
Thermometer	Coolant Temp	Red	Overheating	Stop, let cool

Nissan-specific notes:
– The Nissan Titan (2017+) has a “Shift to Park” warning that can appear even when in Park due to a faulty shift position sensor.
– Nissan models with AWD can trigger an AWD high-temperature warning during challenging conditions. Stop and let cool for 15-20 minutes.
– The 19 Nissan dashboard symbols guide covers the same symbols as the general Nissan guide. All Nissan models use the same symbol set.

Nissan Titan Dashboard Symbols and Meaning Explained

Ford Dashboard Symbols (Edge, Explorer, Fusion, General)

Ford uses standard automotive symbols across all models (Edge, Explorer, Fusion, Escape, F-150). Key symbols:

Symbol	Name	Color	Meaning	Action
Engine icon	Check Engine	Amber	Emissions/powertrain fault	Tighten fuel cap, scan codes
Wrench	Powertrain Warning	Amber	Throttle body or powertrain issue	Diagnose soon
Oil can	Oil Pressure	Red	Low oil pressure	Stop immediately
(!) circle	Brake System	Red	Brake fault	Check fluid, tow if needed
Battery	Charging System	Red	Alternator failure	Drive to shop
ABS	Anti-Lock Brakes	Amber	ABS disabled	Drive carefully to shop
Tire !	TPMS	Amber	Low tire pressure	Check tires
Airbag	SRS	Amber	Airbag fault	Schedule dealer diagnosis
Thermometer	Coolant Temp	Red	Overheating	Stop, let cool
Door ajar	Door Open	Red	Door not latched	Stop, close doors

Ford-specific notes:
– The wrench light is Ford-specific and indicates a powertrain or throttle body issue. On 2013-2016 Ford Escape and Fusion, this is a known issue with the electronic throttle body. Ford issued TSBs for this.
– The check engine light and wrench light appearing together on Ford Escapes (2013-2019) almost always points to the throttle body.
– The Ford Edge (2015+) and Ford Explorer (2017+) use the same symbol set as the Fusion and Escape.
– The Ford Fusion (2017) dashboard symbols are identical to other Ford models of the same era.

Toyota Dashboard Symbols (Hilux, Corolla)

Toyota uses standard automotive symbols across all models. The Hilux and Corolla use the same symbols as the Camry, RAV4, and Tacoma. Key symbols:

Symbol	Name	Color	Meaning	Action
Engine icon	Check Engine	Amber	Emissions/powertrain fault	Tighten fuel cap, scan codes
Wrench	Maintenance Required	Amber	Mileage service reminder	Schedule oil change
Oil can	Oil Pressure	Red	Low oil pressure	Stop immediately
(!) circle	Brake System	Red	Brake fault	Check fluid, tow if needed
Battery	Charging System	Red	Alternator failure	Drive to shop
ABS	Anti-Lock Brakes	Amber	ABS disabled	Drive carefully to shop
Tire !	TPMS	Amber	Low tire pressure	Check tires
TRAC OFF	Traction Control Off	Amber	TRAC disabled (by engine fault or manually)	If with check engine: fix engine code
VSC OFF	Stability Control Off	Amber	VSC disabled	If with check engine: fix engine code
4H/4L	4WD Indicator	Green	4WD mode engaged	Normal on 4WD models
Thermometer	Coolant Temp	Red	Overheating	Stop, let cool

Toyota-specific notes:
– The Toyota Hilux (2016+) has 4WD indicator lights (4H and 4L) that show which four-wheel drive mode is engaged. These are informational, not warnings.
– The Toyota Corolla (2014+) uses the same symbol set as all other Toyotas. The maintenance required light (wrench) is a mileage reminder, not a fault.
– When the check engine light comes on, the TRAC OFF and VSC OFF lights illuminate simultaneously. This is normal Toyota behavior. Fix the engine code and all three lights clear.

Mazda 6 Dashboard Symbols

Mazda uses standard automotive symbols with a few Mazda-specific additions:

Symbol	Name	Color	Meaning	Action
Engine icon	Check Engine	Amber	Emissions/powertrain fault	Tighten fuel cap, scan codes
Oil can	Oil Pressure	Red	Low oil pressure	Stop immediately
(!) circle	Brake System	Red	Brake fault	Check fluid, tow if needed
Battery	Charging System	Red	Alternator failure	Drive to shop
ABS	Anti-Lock Brakes	Amber	ABS disabled	Drive carefully to shop
Tire !	TPMS	Amber	Low tire pressure	Check tires
BSM	Blind Spot Monitor	Amber	BSM system fault	Diagnose if stays on
DRSS	Distance Recognition	Amber	Radar cruise fault	Diagnose if stays on
Glow plug	Glow Plugs	Amber (diesel)	Glow plugs active	Wait for light to turn off before starting
Thermometer	Coolant Temp	Red	Overheating	Stop, let cool

Mazda-specific notes:
– The Mazda 6 (2014+) has a Blind Spot Monitoring (BSM) system with its own warning light. If the BSM light stays on when no vehicle is in the blind spot, the radar sensor may be blocked or faulty.
– The Distance Recognition Support System (DRSS) is Mazda’s adaptive cruise control. If the DRSS light is amber, the radar sensor may be blocked by dirt, snow, or a misaligned front grille.
– Mazda diesel models have a glow plug indicator that should turn off before starting the engine. Wait for it to extinguish, then start.

Suzuki Swift Dashboard Symbols

Suzuki uses standard automotive symbols. The Swift has a simpler dashboard than larger vehicles:

Symbol	Name	Color	Meaning	Action
Engine icon	Check Engine	Amber	Engine fault	Scan codes
Oil can	Oil Pressure	Red	Low oil pressure	Stop immediately
(!) circle	Brake System	Red	Brake fault	Check fluid, tow if needed
Battery	Charging System	Red	Alternator failure	Drive to shop
ABS	Anti-Lock Brakes	Amber	ABS disabled	Drive carefully to shop
Tire !	TPMS	Amber	Low tire pressure	Check tires
Airbag	SRS	Amber	Airbag fault	Schedule dealer diagnosis
Thermometer	Coolant Temp	Red	Overheating	Stop, let cool
ESP	Electronic Stability	Amber	ESP disabled or active	If flashing: normal. If steady: diagnose

Suzuki-specific notes:
– The Suzuki Swift (2017+) has an Electronic Stability Program (ESP) indicator. If it flashes amber during cornering, the system is actively preventing a skid (normal). If it stays on steadily, the ESP system has a fault.
– The Suzuki Swift dashboard is simpler than larger vehicles and may not have all the symbols found on luxury vehicles. Check your owner’s manual for the complete symbol list for your specific trim and year.

Complete Dashboard Warning Lights Guide: All Brands Explained

What to Do When a Light Comes On (All Brands)

Use this universal sequence for any vehicle:

Is it red? Pull over safely within the next minute. Stop the engine. Check fluid levels once cool. Do not drive if a red light returns after topping up.
Is it amber and flashing? Reduce speed and load immediately. Drive to the nearest shop. A flashing amber is treated like a red.
Is it amber and steady? Note the symbol. Tighten the fuel cap if it is the check engine light. Schedule diagnosis within the week.
Is it green or blue? No action. It is informational. Confirm the feature is one you intended to switch on.

The one mistake mechanics see most often: ignoring an amber light because “the car feels fine.” What starts as a minor issue (loose fuel cap, degraded fluid, worn sensor) can become a major repair (catalytic converter, transmission, engine) if ignored. The amber light is your cheap early warning. Use it.

Cost to Diagnose Dashboard Lights

Service	DIY Cost	Shop Cost (US avg)	Time
OBD2 code scan	$25-40 (scanner)	Free at auto parts stores; $80-150 at shop	5-15 min
Fuel cap replacement	$12-25	$25-60	2 min
Wheel speed sensor	$25-60 (part)	$120-220	30-45 min
Coolant leak diagnosis	–	$80-150	30-60 min
Oil pressure diagnosis	–	$80-150	30-90 min
Brake fluid top-up	$6 (fluid)	$20-40	5 min
Key fob battery	$3-5 (battery)	$15-30	2 min

Frequently Asked Questions

Q: What do the colors on my dashboard mean?
A: Red means stop driving immediately. Something is actively failing or about to cause damage. Amber/yellow means caution, a system needs attention but the vehicle is still drivable. Green/blue means informational, a feature is switched on. This color system is universal across all vehicle brands including Ford, Toyota, Nissan, Mazda, Suzuki, and Caterpillar.

Q: What does the wrench light mean on a Ford?
A: The wrench light is Ford-specific and indicates a powertrain or throttle body issue. On 2013-2016 Ford Escape and Fusion, this is a known issue with the electronic throttle body. Ford issued technical service bulletins for it. If the wrench light and check engine light appear together, the throttle body is the first component to inspect.

Q: What does the TRAC OFF light mean on a Toyota?
A: The TRAC OFF light means traction control is disabled. On Toyotas, this almost always happens because the check engine light came on and the engine computer disabled traction control as a precaution. Fix the engine code (most commonly a loose fuel cap) and the TRAC OFF light clears automatically. Do not diagnose the TRAC OFF light separately.

Q: What do Caterpillar warning symbols mean?
A: Caterpillar equipment uses a different symbol set than passenger vehicles. Key symbols include DEF fluid (amber, refill DEF), emission fault (amber, diagnose), hydraulic system (red, stop), and filter restriction (amber, check filter). Caterpillar has three warning levels: Level 1 (amber, service soon), Level 2 (red flashing, stop operating), and Level 3 (red solid with alarm, shut down immediately).

Q: Why does my maintenance required light come on?
A: The maintenance required light (wrench icon on Toyota, or “MAINT REQD” on some models) is a mileage-based service reminder. It illuminates at preset intervals (usually every 5,000 miles) to remind you that an oil change or scheduled service is due. It is not a fault indicator. Reset it with a button sequence after service. Do not confuse it with the check engine light, which means something is actually wrong.

Q: Can I drive with an amber warning light on?
A: Yes, but with caution and only for a short time. The vehicle is drivable, but the underlying issue will not fix itself. Schedule diagnosis within a week. If the light is flashing, that means a more urgent issue (usually an engine misfire). Reduce speed and get to a shop the same day. Do not ignore an amber light for weeks, as minor issues can become major repairs.