Priority order when multiple lights are on
Always address red oil, brake, and coolant warnings before scanning amber codes. Low system voltage alone can trigger 2–4 lights at once — battery + electric power steering + ABS is a common trio on many 2010+ cars, and treating each amber light as a separate repair often wastes money when one charging fault is the root cause.
Check engine + traction control
An engine fault can disable traction or stability control. Scan engine codes first before chasing the traction light alone.
ABS + brake warning
More serious than ABS alone. Check brake fluid level and pedal feel. Stop if braking feels weak or the pedal goes soft.
Battery + power steering
Low system voltage can affect electric power steering. Inspect the alternator, drive belt, and battery connections urgently.
Oil pressure + engine noise
Stop the engine immediately. Driving with low oil pressure and engine noise can cause severe damage.
Coolant temperature + steam
Pull over and shut off the engine. Let it cool before opening the coolant system.
Tyre pressure + steering pull
One tyre may be very low or damaged. Slow down and inspect all tyre pressures as soon as safe.
What to do first
- Note which lights are red vs amber.
- Check whether the car feels, sounds, or smells unusual.
- Address any red brake, oil, or temperature warnings before continuing.
- Scan for fault codes if you have access to OBD-II diagnostics.
FAQ
Two dashboard lights are on together — is that one problem or two?
Often one root cause: low voltage can light battery + power steering + ABS together; an engine fault can trigger check engine + traction control; low brake fluid can trigger both brake and ABS warnings. Start with the highest-severity color, then look for shared systems before replacing parts for each light separately.
Which combination is most urgent?
Oil pressure + any other red light, brake + ABS together with a soft pedal, or coolant temperature + steam. These combinations should be treated as stop-now events, not drive-to-the-shop situations.
I checked basics but both lights are still on — why?
Shared wiring, low voltage after a battery disconnect, or one stored fault disabling another system are common. An OBD-II scan plus a charging-system test often explains paired amber lights better than visual checks alone.
What does Service Vehicle Soon mean with ABS or traction control?
Service Vehicle Soon (or a similar wrench/chassis message) is a general alert that something in the brake, stability, suspension, or drivetrain network needs diagnosis — it is not one specific part. With ABS or traction control, one underlying fault often disables related systems: low voltage can store multiple chassis codes; a wheel-speed sensor fault can trigger ABS and traction together; brake fluid or hydraulic issues can pair brake and ABS warnings. Scan all modules, fix the root cause, then clear codes — do not replace ABS and traction parts separately without testing.
Related symbol guides
More scenarios
This scenario guide is general information only. Confirm warnings with your owner's manual. Read full disclaimer.