Section 10 (Engine Controls - Tests W/Codes - 3.8L)
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 1993 Pontiac Bonneville, 1993 Oldsmobile Ninety-Eight, 1993 Oldsmobile Eighty-Eight, 1993 Buick Riviera, and 1993 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- ECM/Pcm Code Charts
- Notes
- Code 13 - Open Oxygen Sensor Circuit
- Code 14 - Coolant Temperature Sensor (Signal Voltage Low)
- Code 15 - Coolant Temperature Sensor (Signal Voltage High)
- Code 16 - System Voltage High/Low (3.8L)
- Code 17 - Rpm Signal Problem (3.8L)
- Code 18 - Cam/Crank Error (3.8L "C", "H" & "W" Bodies)
- Code 21 - Throttle Position Sensor (Signal Voltage High)
- Code 22 - Throttle Position Sensor (Signal Voltage Low)
- Code 23 - Mat Sensor (Signal Voltage High)
- Code 24 - Vehicle Speed Sensor (3.8L "W" Body)
- Code 24 - Vehicle Speed Sensor (3.8L "C", "E" & "H" Bodies)
- Code 25 - Mat Sensor (Signal Voltage Low)
- Code 26 - Quad-Driver "A" (3.8L "C" & "H" Bodies) (1 Of 3)
- Code 26 - Quad-Driver "A" (3.8L "C" & "H" Bodies) (2 Of 3)
- Code 26 - Quad-Driver "A" (3.8L "C" & "H" Bodies)(3 Of 3)
- Code 26 - Quad-Driver Error (3.8L "E" Body)(1 Of 3)
- Code 26 - Quad-Driver Error (3.8L "E" Body)(2 Of 3)
- Code 26 - Quad-Driver Error (3.8L "E" Body)(3 Of 3)
- Code 26 - Quad-Driver "A" Error (3.8L "W" Body) (1 Of 4)
- Code 26 - Quad-Driver "A" Error (3.8L "W" Body)(2 Of 4)
- Code 26 - Quad-Driver "A" Error (3.8L "W" Body)(3 Of 4)
- Code 26 - Quad-Driver "A" Error (3.8L "W" Body)(4 Of 4)
- Code 31 - Park/Neutral Switch Circuit
- Code 34 - MAF Sensor (Signal Voltage Low)
- Code 35 - IAC Idle Speed Error Without Tech 1
- Code 35 - IAC Idle Speed Error Using Tech I
- Code 36 - Shift Problem (3.8L "C" & "H" Bodies)
- Code 36 - Shift Problem (3.8L "E" & "W" Bodies)
- Code 38 - Brake Switch
- Code 39 - TCC Circuit W/O Tech 1 (3.8L W/4T60 Trans)
- Code 39 - TCC Circuit Using Tech 1 (3.8L W/4T60 Trans)
- Code 41 - Cam Sensor Circuit (3.8L "C", "E" & "H" Bodies)
- Code 41 - Cam Sensor Circuit (Type II, "C", "E", "H" & "W" Body)
- Code 42 - Est Circuit Open Or Grounded
- Code 43 - ESC Error (Without ESC Module)
- Code 44 - Lean Exhaust Indication
- Code 45 - Rich Exhaust Indication
- Code 48 - Misfire Diagnosis
- Code 51 - Faulty Prom/Mem-Cal
- Code 52 - Faulty Cal-PAK
- Codes 53, 54 & 55 - EGR Fault (3.8L (VIN L) Except "E" Body)
- Codes 54 & 55 - EGR Fault (3.8L (VIN 1) "C" & "H" Bodies)
- Code 55 - ECM Error (Except 3.8L (VIN 1))
- Code 56 - Quad-Driver Error (3.8L Except "E" Body)(1 Of 2)
- Code 56 - Quad-Driver Error (3.8L Except "E" Body)(2 Of 2)
- Code 57 - Boost Control Problem (3.8L (VIN 1))
- Code 58 - Pass-Key Fuel Enable Circuit (3.8L Except "W" Body)
- Code 61 - Cruise Vent Solenoid (3.8L)
- Code 62 - Cruise Vacuum Solenoid (3.8L)
- Code 63 - Cruise System Problem (3.8L Except "E" Body)
- Code 65 - Cruise Servo Position (3.8L)
- Code 66 - Low A/C Refrigerant Charge (3.8L Except "E" Body (W/O Digital Display))
- Code 66 - Low A/C Refrigerant Charge (3.8L "C" & "H" Bodies (W/Digital Display))
- Code 67 - Cruise Engage Switches (3.8L Except "W" Body)
- Code 67 - Cruise Switches (3.8L (VIN L) "W" Body)
- Code 68 - Cruise System Problem (Using Tech 1) (3.8L)
- Code 69 - A/C Head Pressure Switch (3.8L "C" & "H" Bodies)
- Code 69 - A/C Head Pressure Switch (3.8L "W" Body)
- Code 85 - Prom Error & Code 87 - EEPROM Error
- Summary