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.
1995 Buick LeSabre CustomFACTORY OEM SERVICE PROCEDURE
Anti-Lock Brake System DTCS
ANTI-LOCK BRAKE SYSTEM DTCS
| OEM Code | Description |
|---|---|
| 21 | FRONT WHEEL SPEED SENSOR CIRCUIT TEST |
| 22 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 23 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 25 | FRONT WHEEL SPEED SENSOR CIRCUIT TEST |
| 26 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 27 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 31 | REAR WHEEL SPEED SENSOR CIRCUIT OPEN OR SHORTED |
| 32 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 33 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 35 | REAR WHEEL SPEED SENSOR CIRCUIT OPEN OR SHORTED |
| 36 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 37 | WHEEL SPEED SENSOR SIGNAL ERRATIC OR MISSING |
| 41 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 42 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 44 | ISOLATION VALVE CIRCUIT OPEN OR SHORTED |
| 45 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 45 | POWER INTERRUPTION |
| 46 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 48 | ISOLATION VALVE CIRCUIT OPEN OR SHORTED |
| 51 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 52 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 55 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 56 | INLET/OUTLET VALVE OPEN OR SHORTED |
| 61 | PUMP MOTOR CIRCUIT TEST |
| 62 | LOW BRAKE PEDAL DURING ABS STOP |
| 71 | EBCM/EBTCM INTERNAL MALFUNCTION |
| 72 | BRAKE SWITCH OPEN OR SHORTED |
| 73 | FLUID LEVEL SWITCH CIRCUIT OPEN OR SHORTED |
| 74 | PRESSURE MODULATOR VALVE (PMV) PRESSURE SWITCH CIRCUIT OPEN OR SHORTED |
| 75 | PCM REQUESTED TCS TO BE DISABLED |
| 76 | DATA LINE SIGNAL OR CIRCUIT MALFUNCTION |
| 77 | DELIVERED TORQUE CIRCUIT FAULT |
Factory Service Tools
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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.