What does fault code C0085 mean?

[StEsther]

C0085 fault code, applicable to all automobile manufacturers, means Traction Control System (TCS) Disable Indicator (Subfault). The function of the Traction Control System (TCS): When it detects wheel slip, it controls torque output by delaying ignition timing, upshifting early, starting in second gear, preventing torque converter lock-up, and applying brakes to prevent slipping.

[EmmettLee]

I've been driving for twenty years and encountered the C0085 trouble code several times. It usually indicates a brake light switch circuit issue, meaning the rear lights don't illuminate or respond when braking. This is very dangerous because it prevents drivers behind from knowing you're slowing down, increasing the risk of rear-end collisions. In my own experience, when this code appeared once, inspection revealed that the internal wear of the brake light switch caused poor contact. After replacing the switch, the issue was resolved at a cost of just around thirty yuan, which was quite straightforward. If not addressed promptly, the vehicle might fail its annual inspection or even get pulled over by the police for a fine. My advice is to perform a simple test as soon as you see this code: have someone press the brake pedal while you check if the rear lights come on. If they don't, avoid driving and get it repaired immediately to prevent risks. Keeping the vehicle's electrical circuits clean can also help prevent such issues.

[McMaddox]

As a car enthusiast, I'm quite familiar with OBD scanners. The C0085 trouble code indicates an issue with the brake light switch circuit, with possible causes including a faulty switch itself, wiring short circuits, or blown fuses. For diagnosis, first confirm by reading with the scanner, then test the switch's power connection—replace it if there's no power. I've fixed such issues myself; replacing the switch is straightforward and quick, requiring only a wrench and multimeter. The cost is low, usually just a few dozen bucks, but safety is paramount. For prevention, regularly inspect the brake system's wiring to avoid dust buildup leading to corrosion. If the problem is complex, involving the computer module, it's best to consult a professional technician, but most cases are minor switch issues. DIY repairs can save a lot of money and also offer learning opportunities.

[LeSavannah]

I'm most afraid of driving dangers. The C0085 trouble code indicates the brake lights may not be working. If the rear lights don't illuminate when braking, it could cause a rear-end collision. The risk is greater when driving in rain or at night. Once the code appears, I stop to check if the rear lights are functioning normally - if they're not working, I immediately go to a repair shop to inspect the switch and fuse. The fix is usually inexpensive, just replace the parts without hesitation. Delaying repairs could lead to much higher accident costs. Peace of mind comes first, safety is the top priority.