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.
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HOMESERVICE MANUALSBUICK1990REGAL CUSTOM, 3.8 L, 4T60/ME9REPAIR AND DIAGNOSISBRAKESTRACTION CONTROLANTI-LOCK BRAKE SYSTEMDIAGNOSIS & TESTINGCODE A059: LOW BRAKE PRESSURE DURING ABS STOP
1990 Buick Regal Custom, 3.8 L, 4T60/ME9
Code A059: Low Brake Pressure During Abs Stop
1990 Buick Regal Custom, 3.8 L, 4T60/ME9SECTION Code A059: Low Brake Pressure During Abs Stop
To set Code A059, the following conditions must occur.
- Vehicle must be in anti-lock brake stop.
- Pump on input senses voltage (pump running).
- Anti-lock brake controller senses voltage at low pressure input for more than 10 seconds during anti-lock brake stop.
NOTE:
Test number refers to test numbers on diagnostic chart.
- If Code A035 has set, service this code before proceeding. If Code A059 is the only code set, problem is in the hydraulic system. Check for fluid leakage or pump failure.
NOTE:
INTERMITTENTS is located under DIAGNOSIS & TESTING.
RENDER: 1.0x
NO RELATED
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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.