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 MANUALSBUICK1995REGAL CUSTOM, 4D SEDAN, 3.8 LREPAIR AND DIAGNOSISGENERAL INFORMATIONDTC INDEXENGINE PERFORMANCE DTCS (3.1L)
1995 Buick Regal Custom, 4D Sedan, 3.8 L
Engine Performance DTCS (3.1L)
1995 Buick Regal Custom, 4D Sedan, 3.8 LSECTION Engine Performance DTCS (3.1L)
ENGINE PERFORMANCE DTCS (3.1L)
| OEM Code | Description |
|---|---|
| 13 | OPEN OXYGEN SENSOR CIRCUIT |
| 14 | COOLANT TEMP SENS SGNL VLTGE LOW (HI TEMP INDICATED) |
| 15 | COOLANT TEMP SENSOR SIGNAL VOLTAGE LOW |
| 16 | SYSTEM VOLTAGE LOW |
| 17 | CAMSHAFT SENSOR ERROR |
| 21 | THROTTLE POSITION SENSOR SIGNAL VOLTAGE HIGH |
| 22 | THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW |
| 23 | IAT SENSOR SIGNAL VOLTAGE HIGH (LOW TEMP INDICATED) |
| 24 | VEHICLE SPEED SENSOR |
| 25 | IAT SENSOR SIGNAL VOLTAGE LOW (HIGH TEMP INDICATED) |
| 28 | TRANS. RANGE PRESSURE SWITCH |
| 33 | MAP SENSOR SIGNAL VOLTAGE HIGH |
| 34 | MAP SENSOR SIGNAL VOLTAGE LOW |
| 35 | IAC IDLE SPEED ERROR |
| 36 | 24X SIGNAL ERROR |
| 37 | TCC BRAKE SWITCH ERROR |
| 41 | CYLINDER SELECT ERROR |
| 42 | IC CIRCUIT OPEN/GROUNDED |
| 43 | KNOCK SENSOR ERROR |
| 44 | LEAN EXHAUST INDICATION |
| 45 | RICH EXHAUST INDICATION |
| 46 | PASS-KEY CIRCUIT |
| 51 | FAULTY PROM/MEM-CAL |
| 52 | FAULTY CAL-PAK |
| 53 | SYSTEM VOLTAGE HIGH |
| 54 | FUEL PUMP VOLTAGE LOW |
| 55 | PCM ERROR |
| 58 | TRANS TEMPERATURE SENSOR HIGH TEMPERATURE |
| 59 | TRANS. TEMPERATURE SENSOR LOW TEMPERATURE |
| 66 | LOW A/C CHARGE |
| 70 | HIGH A/C PRESSURE |
| 72 | VEHICLE SPEED SENSOR CIRCUIT |
| 79 | TRANSMISSION FLUID OVERTEMP |
| 80 | TRANSAXLE COMPONENT SLIPPING |
| 82 | 3X SIGNAL ERROR |
| 85 | PROM ERROR |
| 86 | ANALOG/DIGITAL ERROR |
| 87 | EEPROM ERROR |
| 90 | TRANSAXLE COMPONENT SLIPPING |
| 96 | TRANSMISSION VOLTAGE LOW |
| 98 | INVALID PCM PROGRAM |
| 99 | INVALID PCM PROGRAM |
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.