Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC C1247: Low Brake Fluid Detected
2000 Buick Century CustomSECTION DTC C1247: Low Brake Fluid Detected
- Perform diagnostic system check. See DIAGNOSTIC SYSTEM CHECK under DIAGNOSIS & TESTING. After performing diagnostic system check, go to next step.
- Check brake fluid level. If brake fluid is at proper level, go to next step. If brake fluid level is low, check brake system for leaks.
- Install a scan tool. Turn ignition on, with engine off. Using scan tool, observe brake fluid level parameter in ABS data list. If scan tool indicates that brake fluid level is normal, problem is intermittent. See INTERMITTENTS & POOR CONNECTIONS under DIAGNOSIS & TESTING. If scan tool indicates that brake fluid level is not normal, go to next step.
- Turn ignition off. Disconnect brake fluid level indicator switch. Turn ignition on, with engine off. Using scan tool, observe brake fluid level parameter in ABS data list. If scan tool indicates that brake fluid level is normal, go to step 6 . If scan tool does not indicate that brake fluid level is not normal, go to next step.
- Check signal circuit of brake fluid level indicator switch for short to ground. Repair as necessary. After repairs, go to step 10 . If circuit is okay, go to step 7 .
- Check for poor connections at brake fluid level indicator switch harness connector. Repair as necessary. After repairs, go to step 10 . If connections are okay, go to step 8 .
- Check for poor connections instrument panel harness connector. Repair as necessary. After repairs, go to step 10 . If connections are okay, go to step 9 .
- Check for poor connections at instrument panel harness connector. Repair as necessary. After repairs, go to next step.
- Replace instrument panel. After replacing instrument panel, go to next step.
- Using scan tool, clear DTCs. Turn ignition on. Recheck DTCs. If DTC resets, go to step 2 . If DTC does not reset, system is okay.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.