Car Warning Lights Dashboard Symbols Guide – What Every Light Means & What to Do

This orange warning light on your dashboard means your alternator is not generating enough power to keep the battery charged. Once the battery drains completely, your car stops running — often without warning. A charge system fault is not something you can safely postpone. Visit our workshop for a full charging system diagnostic, and our technicians will identify and replace the failed component before the fault leaves you stranded on the road.

This vehicle warning indicator signals a fault in your electronic throttle system, which directly controls engine power output. Your car may enter limp mode, restricting acceleration to protect the drivetrain. While limp mode allows you to drive slowly to safety, the underlying fault must be resolved with a proper car warning light diagnosis — our technicians will scan the system, identify the stored fault code, and restore your engine's full performance.

The glow plug light is a diesel-specific car dashboard symbol indicating that one or more glow plugs have failed. These plugs heat the combustion chamber before startup, making them essential for reliable cold-start performance. A faulty glow plug causes hard starting, rough idling, increased fuel consumption, and higher emissions. Bring your vehicle to our workshop, and our diesel specialists will replace the faulty plugs and restore smooth, reliable starting.

The Electronic Stability Control system actively prevents skidding by applying targeted braking to individual wheels. When this orange warning light is active and you did not manually switch it off, ESC has developed a fault and is no longer protecting you. Without ESC, the risk of losing control during sudden manoeuvres or slippery road conditions increases significantly. Our team will use an OBD2 scanner to identify the fault and restore your stability system to full operation.

The traction control light (TC/ESP) signals that wheel-spin protection is no longer active. In sandy, wet, or slippery conditions, traction control prevents uncontrolled wheelspin during acceleration — without it, the risk of losing directional control increases considerably. If you did not turn it off manually, a fault in a wheel speed sensor or the stability control module is likely. Our technicians will run a full car warning light diagnosis and restore the system to its correct working state.

Stability control is one of the most important active safety systems in a modern vehicle. A fault means the system that prevents rollovers and spin-outs is disabled, leaving you significantly more exposed in emergency situations. This is a high-priority automobile warning light that warrants professional attention as soon as possible. Our team will carry out a full car warning light diagnostic, identify the exact fault, and repair the system so you can drive with full confidence again.

This dashboard warning light signals a fault in your Lane Departure Warning system — a camera-based safety feature that alerts you when your vehicle drifts out of its lane without indicating. The fault is often a dirty, misaligned, or obstructed forward-facing camera, or a software glitch in the ADAS module. Our technicians will inspect and recalibrate the system to factory accuracy so that it protects you reliably on every journey.

Blind spot monitoring uses rear-facing radar sensors to detect vehicles in your side blind zones and alert you before lane changes. When this vehicle warning indicator illuminates, those real-time alerts are no longer functioning, which means you could change lanes directly into another vehicle without any warning. Our specialists will inspect the radar sensors, identify the fault, and restore the system so that every lane change is backed by full blind spot protection.

Forward Collision Warning uses radar or camera technology to detect vehicles and obstacles ahead, alerting you to potential impacts in real time. When this car dashboard symbol is active, you have lost that automated early warning — a significant safety gap at motorway speeds. Our team uses specialist ADAS diagnostic tools to inspect the system, identify the fault, and recalibrate the sensors so that your collision warning system works accurately every time.

Most electric vehicles display this vehicle warning indicator when around 20 to 50 kilometres of range remain, depending on the model, driving speed, and temperature. Repeatedly depleting the battery to critically low levels accelerates cell degradation over time. If your available range is dropping faster than it should between charges, or if charging is taking significantly longer than normal, visit our workshop so our EV specialists can carry out a battery health check and report on your vehicle's true capacity.

This is the most urgent battery dashboard indicator light your EV will display — it means very little range remains, often just five to fifteen kilometres. Driving past this warning risks a complete battery depletion, which can trigger a deep discharge condition damaging to some battery chemistries. If your vehicle reaches this point earlier than your driving habits would suggest, bring it to our workshop so our team can carry out a full battery inspection and charging system assessment.

The PLUG IN reminder on a plug-in hybrid (PHEV) indicates that the battery needs charging from an external power source to maintain its electric driving range. If you are charging regularly but this warning light symbol on the dashboard keeps appearing, there may be a fault with the onboard charger, the charging port, or the battery's ability to hold a full charge. Bring your vehicle to our workshop, and our technicians will scan the system and identify the exact cause.

The SECURITY warning light typically indicates a fault in your vehicle's immobiliser or anti-theft system. In some cases it means the key has not been recognised, but it can also point to a deeper fault in the immobiliser control unit. A persistent security light should be investigated with a car computer diagnostic scan. Our technicians will identify the exact fault, recode the key or repair the immobiliser module, and confirm that your vehicle is both fully secure and starting reliably.

An active immobiliser warning means the anti-theft system is preventing the engine from starting because it has not recognised the key transponder. Common causes include a flat key battery, a damaged transponder chip, or a fault in the immobiliser ECU. This vehicle warning indicator should not be confused with a dead battery or a starter fault — the engine will not crank at all when the immobiliser is active. Our technicians will recode the transponder or repair the ECU and restore normal, reliable starting.

The DPF warning light (Diesel Particulate Filter) means your filter has accumulated more soot than it can burn off through its normal passive regeneration cycle. In some cases, a sustained motorway drive will trigger an active regeneration and clear the warning. However, if the warning light will not turn off after driving, the DPF requires a forced regeneration, a professional clean, or in severe cases, replacement. Visit our workshop and our diesel specialists will restore the filter to full working condition.

A fully blocked particulate filter forces exhaust gases back through the engine, causing progressive damage to turbochargers, EGR valves, and engine oil that becomes contaminated with soot. What begins as a straightforward dashboard warning light check can escalate into a multi-component repair if left unattended. Act now, and let our technicians carry out a professional DPF clean to remove the blockage completely and protect the rest of your engine from further damage.

The EGR (Exhaust Gas Recirculation) valve controls the recirculation of exhaust gases back into the intake to reduce emissions. Over time, carbon deposits accumulate on the valve, causing it to stick open or closed — leading to rough idling, reduced power, increased fuel consumption, and a failed emissions test. Our technicians will use an OBD2 scanner to confirm whether cleaning or full valve replacement is the right course of action, and they will carry out the work to restore your engine's correct operation.

Hill Descent Control (HDC) manages your vehicle's speed automatically when descending steep slopes, using the ABS and traction control systems to prevent wheel lockup. A HDC FAULT warning means this system has deactivated — typically due to a wheel speed sensor fault, an ABS module error, or a software issue. Is it safe to drive with this warning light on? On flat roads, yes — but avoid any steep or off-road terrain until the fault is resolved. Visit our workshop and our technicians will identify and fix the issue correctly.