After a collision, even a minor one. You might see dashboard warning lights that weren’t there before. Some are expected. Some are urgent. All of them mean something, and ignoring them can be dangerous. If you’ve just been in an accident, follow the steps to take after a collision in Sherwood Park first, then deal with the warning lights.

Here’s what Sherwood Park drivers should know about post-collision warning lights and why modern vehicles need proper scanning after any impact.

Why warning lights appear after a collision

Modern vehicles have dozens of electronic modules, sensors, and cameras connected to safety and driving systems. A collision can trigger warning lights in several ways:

  • Physical damage to a sensor, camera, or wiring harness
  • Misalignment of a radar unit or camera housing, even slightly
  • A module storing a fault code from the impact force itself (the vehicle detected something abnormal)
  • A disconnected connector that came loose during impact
  • Fluid level changes (coolant, oil, brake fluid) from a cracked reservoir or line

Even a parking lot fender bender can jostle a sensor enough to throw a code.

Common post-collision warning lights

Airbag / SRS light

Urgency: High. The supplemental restraint system detected an issue. This could mean:

  • An airbag deployed (obvious)
  • An airbag connector was disturbed
  • A crash sensor stored a code from the impact
  • A seatbelt pretensioner fired

Do not ignore this light. Your airbags may not deploy in a subsequent collision until the system is properly diagnosed and reset.

Check engine light

Urgency: Medium to high. The engine management system found a fault. Post-collision causes include:

  • Damaged oxygen sensor, MAF sensor, or wiring
  • EVAP system damage (charcoal canister, fuel filler neck)
  • Catalytic converter impact damage
  • Loose or cracked intake components

A check engine light needs a diagnostic scan to identify the specific code.

ABS / traction control / stability control

Urgency: High. These systems share wheel speed sensors and a common control module. Post-collision causes:

  • Damaged wheel speed sensor (common in front-end and side impacts)
  • Bent tone ring on a hub assembly
  • ABS module fault from impact
  • Steering angle sensor needs recalibration after wheel alignment work

If ABS, traction control, and stability control lights are all on together, the vehicle has likely lost electronic stability assistance. Drive carefully until it’s diagnosed.

ADAS warnings (lane departure, forward collision, blind spot)

Urgency: High. These systems use cameras and radar that are extremely sensitive to alignment:

  • A front camera behind the windshield can be knocked out of calibration by an impact anywhere on the front end
  • Front radar (usually behind the grille or bumper) can be misaligned by a bumper replacement
  • Blind spot radar in the rear bumper can be affected by rear-end impacts
  • Any of these systems can throw a warning if they detect their own misalignment

ADAS warnings mean the system has either shut itself off or is operating inaccurately. Both are dangerous, a lane-keeping system that’s slightly off can steer you into traffic rather than away from it. See our full ADAS recalibration guide.

Tire pressure (TPMS)

Urgency: Medium. A collision can:

  • Damage a TPMS sensor in the wheel
  • Cause a slow leak from rim damage
  • Break a valve stem

Check your tire pressures manually. If they’re correct and the light persists, a sensor likely needs replacement.

Power steering warning

Urgency: Medium to high. Electric power steering systems can throw codes from:

  • A damaged steering rack or column
  • A disturbed steering angle sensor
  • Wiring damage in the steering system

If the steering feels heavy or unresponsive, do not drive the vehicle until it’s inspected.

Pre-scan and post-scan: why both matter

A proper collision repair includes two diagnostic scans:

Pre-scan (before repair begins):

  • Documents every fault code stored at the time of the collision
  • Creates a baseline so the shop knows what needs to be addressed
  • Required by most OEM repair procedures

Post-scan (after repair is complete):

  • Confirms all fault codes have been cleared and don’t return
  • Verifies ADAS calibrations were completed successfully
  • Documents that the vehicle’s electronic systems are functioning correctly

If your shop doesn’t mention scanning, ask about it. It’s not optional on modern vehicles. It’s part of a complete repair. A vehicle that leaves the shop with active fault codes isn’t fully repaired.

What if warning lights appear after you pick up your vehicle?

If you see new warning lights after your repair is complete:

  1. Contact your shop immediately: a reputable shop will want to know
  2. Note which lights are on: take a photo of the cluster
  3. Don’t assume it’s unrelated: post-repair warning lights are often connected to the work that was done
  4. Check your warranty: quality shops warranty their work and will re-scan at no charge

A shop with a lifetime warranty and proper post-scan procedures will address this without issue. That’s one reason choosing the right shop matters.

The bottom line

Dashboard warning lights after a collision aren’t just annoyances. They’re your vehicle telling you something is wrong. Modern vehicles are packed with safety systems that depend on precise calibration and intact wiring. A proper collision repair addresses every stored fault code, recalibrates every affected system, and confirms everything with a clean post-scan.

If your shop hands you the keys and says “don’t worry about that light,” worry about that shop.

This guide is educational. Always follow your vehicle manufacturer’s recommendations and confirm repair procedures with your chosen shop.