Automotive Repair

Automotive Diagnostic Codes of Buick Car of Year - 1993


Buick Diagnostic Trouble Codes - 1993


 13  Open Oxygen Sensor Circuit.
 14  Coolant Temperature Sensor (High Temp Indicated).
 15  Coolant Temperature Sensor (Low Temp Indicated).
 16  System Voltage High.
 17  Spark Reference Circuit.
 18  Cam/Crank Error.
 21  Throttle Position Sensor (Signal Voltage High).
 22  Throttle Position Sensor (Signal Voltage Low).
 23  Intake Air Temp (IAT) Sensor (Low Temp Indicated).
 24  Vehicle Speed Sensor (VSS) Circuit.
 25  Intake Air Temp (IAT) Sensor (High Temp Indicated).
 26  Quad-Driver (QDM) Circuit.
 31  Park/Neutral Switch Circuit.
 34  Mass Air Flow Sensor (MAF) (GM/SEC Low).
 36  Transaxle Shift Control Problem.
 38  TCC Brake Input Circuit.
 39  Torque Converter Clutch (TCC) Circuit.
 41  Cam Sensor Circuit.
 42  Electronic Spark Timing (EST) Circuit.
 43  Electronic Spark Control (ESC) Circuit.
 44  Oxygen Sensor Circuit (Lean Exhaust Indicated).
 45  Oxygen Sensor Circuit (Rich Exhaust Indicated).
 51  Mem-Cal Error.
 53 
 54 
 55 
Exhaust Gas Recirculation (EGR) Fault.
 56  Quad-Driver "B" (QDM) Fault.
 61  Cruise - Vent Solenoid Circuit.
 62  Cruise - Vacuum Solenoid Circuit.
 63  Cruise Control Circuit.
 65  Cruise - Servo Position Circuit.
 66  Low A/C Refrigerant Charge.
 67  Cruise Switches Circuit.
 68  Cruise System Problem.
 69  A/C Head Pressure Switch Circuit.
 99  Power Management.





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