# Warning Lights On After an Accident? | DG Collision > Triage by light: airbag = inspect before trusting the car, ABS = braking help degraded, flashing = stop now. And no lights doesn't mean no damage — scan both. - Canonical page: https://dgcollision.com/answers/warning-lights-on-after-accident/ - This file: Markdown twin of the page above (clean text for AI assistants and crawlers) - Business: DG Collision Center, 693 Metro Park Cir #20, Lewisville, TX 75057 — (972) 219-0864 (text: 817-907-2822) — since 1978 - Hours: Mon–Fri 8:30am–5:30pm, Sat 10am–1pm, closed Sunday · 24/7 towing · 4.9/5 on 500+ Google reviews - Full site index for assistants: https://dgcollision.com/llms.txt - Last generated: 2026-08-14 --- # WARNING LIGHTS ON AFTER AN ACCIDENT? Quick Answer Dashboard lights after a crash are the car filing its own damage report — read them by severity. An airbag light means the restraint system has a fault and may not protect you in the next crash: inspect before relying on the car. ABS or brake lights mean braking help may be degraded — same urgency. A check-engine light with flashing, or temperature/oil warnings, mean stop driving now. And the reverse is just as important: no lights doesn’t mean no damage — plenty of crash faults log silently as codes without lighting the dash, which is why a pre-repair diagnostic scan is standard practice at DG (free to you: billed to insurance on covered repairs, on us for estimate-only visits). Every light traced to the crash is claim damage, and the scan report is the document that proves it. Get a Free Written Estimate By [Shah Jiwani](https://dgcollision.com/about/shah-jiwani/) · Owner, DG Collision Center Updated September 29, 2026 4 min read I-CAR Gold Class · PPG Certified The Longer Answer ## WHAT EACH LIGHT MEANS AFTER A CRASH — AND WHAT THE SCAN SEES Triage by light. The airbag light is the one you never gamble on: it means the restraint system found a fault — a triggered sensor, a wiring problem, a module error — and until it’s diagnosed, you should assume the bags may not deploy when needed. If bags did deploy, the car has bigger decisions pending anyway ([that math has its own guide](https://dgcollision.com/guides/airbags-deployed-is-my-car-totaled/)); if they didn’t but the light is on, the crash likely disturbed a sensor or connector, and everything in that system is repaired to one standard here: genuine parts, always, per the manufacturer’s procedure. ABS and brake-system lights after impact suggest a wheel-speed sensor, tone ring, or harness casualty — the car still brakes, but its anti-lock and stability help may be offline exactly when a panic stop needs them. Flashing check-engine, temperature, or oil pressure: park it — those protect the engine from becoming the crash’s most expensive casualty, and driving through them can turn a claimable repair into an argument. Now the quieter half of the story. Modern cars log faults constantly, and a crash can set dozens of codes — sensor disconnects, module resets, out-of-range readings — of which only the serious few light the dash. That’s why the industry standard, and ours, is the pre-repair scan: before work begins, every module gets read, and the fault list becomes part of the estimate — evidence of electronic damage the eye can’t see, documented while the connection to the crash is fresh. After repair, the post-repair scan proves the systems woke up clean, and on anything that disturbed a camera or radar, [calibration](https://dgcollision.com/answers/is-adas-calibration-necessary/) finishes the job through our specialist partners with the printed report verified before delivery. Both scans are free to you — billed to insurance on covered repairs, on us if you’re only here for an estimate. The claims logic writes itself from there: lights and codes traced to the crash are crash damage — sensors, harnesses, modules, and the labor to diagnose them belong on the claim, entering through the estimate or the supplement like any hidden damage. What weakens that position is time and silence: driving months on an airbag light, then trying to attach it to the claim, invites the “pre-existing” argument. The strong move costs nothing — scan early, document the fault list, report symptoms promptly. If a light came on with your crash, send us a photo of the dash along with the damage; it genuinely helps the first look. Related Questions ## ASKED ALONGSIDE THIS ONE The light went off by itself. Is the problem gone? + A: Not necessarily — many faults set a light only while the condition is active, then extinguish it and keep the code in memory. An intermittent fault is still a fault, and after a crash it’s still evidence. The scan reads stored history precisely so a light that “went away” can’t take the record with it. Can a shop just clear the codes so the lights turn off? + A: Anyone can clear codes — that’s erasing the report, not fixing the fault, and on unrepaired problems the light returns while the documentation trail is now gone. Clearing codes as a “repair” is the electronic version of bending a striker so the door closes. Codes get cleared here after the cause is fixed and verified, with before-and-after reports in the file. The scan found codes but no lights were ever on. Does insurance really pay for that? + A: Crash-caused faults are crash damage whether or not they lit the dash — what carriers reasonably ask for is documentation, which is exactly what the pre-repair scan report is: fault, module, and the diagnosis connecting it to the loss. Scan-documented electronic damage entering through supplements is routine claim work, not a stretch. My car needs the battery disconnected for repair. Will that cause more lights? + A: It can — many systems want relearn or initialization procedures after power loss (windows, steering-angle sensors, some radios), and lights from that are normal and expected mid-repair. It’s also exactly why the post-repair scan exists: the car leaves with the relearns done and the module list verified clean, not with “those will probably go off eventually.” Go Deeper [Airbags deployed — now what?](https://dgcollision.com/guides/airbags-deployed-is-my-car-totaled/) · [Can I drive it? The triage guide](https://dgcollision.com/guides/can-i-drive-my-car-after-an-accident/) · [Pre- & post-repair scans](https://dgcollision.com/glossary/#scan) · [All quick answers](https://dgcollision.com/answers/)