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Home >> Oldsmobile >> 1993 >> Ninety-Eight Regency >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 3.8L >> Self-Diagnostic System >> Trouble Code Definition
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Trouble Code Definition

ECM/PCM TROUBLE CODE DEFINITION

Code No. Circuit Affected
12 (1) No RPM Reference Pulse
13 Oxygen Sensor Circuit Open Left Oxygen Sensor Circuit Open (Dual-Sensor Models)
14 Coolant Temperature Sensor Signal Voltage Low
15 Coolant Temperature Sensor Signal Voltage High
16 System Voltage High/Low (3.8L)
17 RPM Signal Problem (3.8L)
18 Cam/Crank Error (3.8L)
21 TPS Signal Voltage High
22 TPS Signal Voltage Low
23 MAT Sensor Signal Voltage High
24 Vehicle Speed Sensor
25 MAT Sensor Signal Voltage Low
26 Quad-Driver Error (3.8L)
31 Park/Neutral Switch (3.8L)
32 EGR System Error
33 MAP Sensor Signal Voltage High
34 MAF Sensor Signal Voltage Low (3.8L)
35 IAC Idle Speed Error
36 (2) Transaxle Shift Problem (3.8L)
38 Brake Switch (3.8L)
39 TCC Circuit (3.8L)
41 Cam Sensor Circuit (3.8L)
42 EST Circuit Open Or Grounded
43 ESC Error
44 Lean Exhaust Indication Left Lean Exhaust Indication (Dual-Sensor Models)
45 Rich Exhaust Indication Left Rich Exhaust Indication (Dual-Sensor Models)
48 Misfire Diagnosis (3.8L)
51 Faulty PROM, MEM-CAL Or ECM/PCM
52 Faulty/Missing CAL-PAC Or MEM-CAL
53 EGR Solenoid No. 1 Failure (3.8L VIN L)
54 EGR Solenoid No. 2 Failure (3.8L VIN L & 1)
55 EGR Solenoid No. 3 Failure (3.8L VIN L & 1)
56 Quad-Driver Error (3.8L "C", "H" & "W" Bodies)
57 Boost Control Problem (3.8L VIN 1)
58 Pass-Key Enable Circuit (3.8L "C", "E" & "H" Bodies)
61 (2) Cruise Vent Solenoid (3.8L)
62 (2) Cruise Vacuum Solenoid (3.8L)
63 Cruise System Problem (3.8L "C", "H" & "W" Bodies) Right Oxygen Sensor Circuit Open (Dual-Sensor Models)
64 Right Oxygen Sensor Lean (Dual-Sensor Models)
65 (2) Cruise Servo Position (3.8L) Right Oxygen Sensor Rich (Dual-Sensor Models)
66 Low A/C Charge
67 (2) Cruise Engage Switches (3.8L "C", "E" & "H" Bodies)
68 (2) Cruise System Problem (3.8L)
69 A/C Head Pressure Switch (3.8L "C" & "H" Bodies)
85 PROM Error
87 EEPROM Error
(1) Display of a Code 12 is normal when reference pulses are not being received by control module (engine not running).
(2) PCM-equipped models.
NOTE: Use trouble code charts only if SERVICE ENGINE SOON light is illuminated (indicating a current problem exists). Exceptions are Code 13, 15, 24, 44 and 45 charts, which may be used to help diagnose intermittent codes. Anytime control module-related Codes 51, 52 or 55 are displayed with another code, start with 50-series code, and then proceed to lower numbered codes.
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