Vehicle Warning Indicators
Oil Pressure Warning
If this light stays lit it indicates loss of oil pressure. Immediately check oil level and pressure.
Coolant Temp Warning
Indicates temperature has exceeded normal limits. Check coolant level, fan operation, radiator cap, coolant leaks.
Battery / Charging Alert
Indicates voltage level is below normal and the vehicle's charging system is not functioning properly. Check battery terminals, alternator belt, and battery condition.
Reduced Power Warning
Indicates Engine Computer has limited engine power output. The ECM has many levels of reduced power depending on what component has failed in its control system. Usually requires diagnostic with a professional scan tool.
Indicates that the cruise control system is engaged while the vehicle is driving.
Traction Control or ESP
Illuminates when the vehicle's traction control/anti-skid or electronic stability system is in use. Usually an indicator that conditions are slippery.
Oil Change Reminder
Indicates that oil life has expired. This is monitored by the ECM; the interval can be mileage or a combination of readings taken by the ECM. The reset procedure is listed in the owners manual.
If the light stays illuminated after starting it indicates that the vehicle has found a fault in the airbag system and the computer has set a code. Professional repair of the supplemental restraint system is recommended.
TPMS (Tire Pressure Monitoring System)
Indicates the tire pressure monitoring system has found tire with low air pressure or a sensor with a dead battery or malfunction. Check tire pressure. Some vehicles will allow manual reset of TPMS light, refer to owner's manual.
Indicates that there is a problem with the vehicle's traction control/anti-skid or electronic stability system.
This symbol indicates that the vehicle's overdrive system has been manually turned off. Typically the overdrive system is controlled by an on/off switch.
Indicates one of three possible conditions: parking brake is on, problem with the braking system/brake fluid is low, or ABS problem. Check brake fluid, make sure parking brake is fully released.
Service Vehicle Soon
Typically indicates a lighting or other electrical problem that is controlled by the BCM (body control module). Check all lights, headlights, turn signals, brake lights, and hazard lights. This may also warn drivers of a traction control problem.
Indicates that the Anti-lock Brake computer has set a code and needs professional diagnostic.
If the symbol lights momentarily it may mean the ignition switch is locked and will need the transponder-equipped key to re-start. If the symbol is visible when vehicle is on, it typically means a malfunction in the security system.
The check gas cap light indicates that the gas cap is not tightened properly. If not addressed, quite often the Check Engine light will also illuminate.
Indicates a door is not closed. Open and close all doors, including hood and trunk. If vehicle is left in this condition overnight it can drain the battery.
Indicates that there is an exterior light on the vehicle that is not functioning properly.
Transmission is operating at higher than optimum temperature as transmission fluid is hotter than normal. Check transmission fluid level and engine coolant level.
Glow Plug (Diesel)
On diesel vehicles this light indicates that the engine's glow plugs are warming up and the engine should not be started until light goes out.
Washer Fluid Reminder
Indicates washer fluid is low. Fill washer fluid reservoir. The cap has a symbol that looks like a windshield. Some vehicles have separate reservoirs for front and rear window washers.
Indicates that the vehicle's front fog lamps are illuminated.