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.
1994 Buick LeSabre CustomFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- ECM/Pcm Code Charts
- Notes
- Code P0101, MAF Sensor Circuit
- Code P0112, IAT Sensor Circuit (Low Temperature Indicated)
- Code P0113, IAT Sensor Circuit (High Temperature Indicated)
- Code P0117, Coolant Temp Sensor Low Temp Indicated
- Code P0118, Coolant Temp Sensor High Temperature Indicated
- Code P0122, Throttle Position Sensor Signal Voltage Low
- Code P0123, Throttle Position Sensor Signal Voltage High
- Code P0131, Heated Oxygen Sensor Low Signal Voltage (Lean)
- Code P0132, Heated Oxygen Sensor High Signal Voltage (Rich)
- Code P0134, Heated Oxygen Sensor Open Circuit
- Code P0171, Fuel Trim Lean
- Code P0172, Fuel Trim Rich
- Code P0321, Spark Reference Circuit
- Code P0325, Knock Sensor Error
- Code P0341, Cam/Crank Error
- Code P0342, Cam Signal Circuit
- Code P0401, (EGR) Flow Test Failure
- Codes P0501/P0502, VSS Circuit
- Code P0703, TCC Brake Switch Input
- Code P0705, Transaxle Range Switch
- Code P0712, Transaxle Temp Sensor Low Temp Indicated
- Code P0713, Transaxle Temp Sensor High Temp Indicated
- Code P0740, Torque Converter Clutch
- Code P0755, Transmission Shift Solenoid "B"
- Codes P1350/P1361, Ic Circuit
- Code P1406, EGR Valve Pintle Position (1 Of 2)
- Code P1406, EGR Valve Pintle Position (2 Of 2)
- Code P1530, A/C Head Pressure Switch
- Code P1558, Cruise System Problem SPS Indicated Low
- Code P1561, Cruise Vent Solenoid
- Code P1562, Cruise Vacuum Solenoid
- Code P1565, Cruise Servo Position
- Code P1567, Cruise Switches Circuit
- Code P1568, Cruise System Problem (SPS Indicated High)
- Code P1571, Traction Control Desired Torque Out Of Range
- Code P1573, Traction CNTRL Fault Loss Of Abs/TCS Serial Data
- Code P1599, Cruise Power Management
- Code P1619, Engine Oil Life Monitor Reset Circuit
- Code P1623, Prom Error
- Codes P1626/1629, Pass-Key II Fuel Enable Circuit
- Code P1630, System Voltage High/Low
- Code P1640, QDM No. 1 Circuit
- Code P1650, QDM No. 2
- Code P1670, QDM No. 4
- Summary
- Wiring Diagrams
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.
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