Section 6 (Engine Controls - Tests W/Codes - V6)
WARNING: This page does not describe the selected car, but rather 24 other vehicles, including the 1993 Pontiac Trans Sport, 1993 Oldsmobile Silhouette, 1993 Oldsmobile Bravada, 1993 GMC Vandura, and 1993 GMC Value Van. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Summary
- Self-Diagnostic Tests
- Notes
- Code 13, Open Oxygen Sensor Circuit
- Code 14, Coolant Sensor Signal Voltage Low
- Code 15, Coolant Sensor Signal Voltage High
- Code 16, System Voltage High/Low 3.8L
- Code 16, Transmission Output Speed 4.3L "S" & "T" Series Utility Vehicles With M/T & 4.3L With 4L60E Transmission
- Code 17, Rpm Signal Problem 3.8L
- Code 18, Cam/Crank Error 3.8L
- Code 21, TPS Signal Voltage High
- Code 22, TPS Signal Voltage Low
- Code 23, Mat Sensor Temp. Low - 3.8L & 4.3L CPI
- Code 23, Mat Sensor Temp. Low - 4.3L Turbo
- Code 24, Vehicle Speed Sensor - 4.3L Turbo & 4.3L ("C", "K" & "P" Series) With Manual Transmission
- Code 24, Vehicle Speed Sensor (VSS) 3.1L
- Code 24, Vehicle Speed Sensor (VSS) 3.8L
- Code 24, Vehicle Speed Sensor 4.3L "S" & "T" Series Pickup With Man. Trans. (Except Turbo) & All 4WD With 4L80-E Transmission
- Code 24, Vehicle Speed Sensor 4.3L "S" & "T" Series Utility Vehicles With Manual Transmission, 4.3L, 5.0L & 5.7L With 4L60E Transmission & All 2WD With 4L80-E Transmission
- Code 25, Mat Sensor Temp. High - 3.8L & 4.3L CPI
- Code 25, Mat Sensor Temp. Low - 4.3L Turbo
- Code 26, Quad-Driver Circuit 3.8L
- Code 26, Quad-Driver No. 1 Circuit - 4.3L "S" & "T" Series Pickup With Manual Transmission
- Code 27, Quad-Driver No. 2 Circuit - 4.3L "S" & "T" Series Pickup With Manual Transmission
- Code 31, Park/Neutral Switch Circuit - 3.8L
- Code 31, Turbo OVERBOOST - 4.3L Turbo
- Code 32, EGR System Error - 3.1L
- Code 32, EGR System Error - 4.3L "G" Series, 4.3L "C", "K" & "M" Series (Non-CALIFORNIA) With 4L60E Transmission & 4.3L "C", "G", "K" & "P" Series With 4L80-E Transmission
- Code 32, EGR System Error 4.3L "S" & "T" Series Utility Vehicles With Manual Transmission (Except CPI)
- Code 32, EGR System Error - 4.3L "C", "K" & "P" Series) & 4.3L "S" & "T" Series Pickup (Except Turbo) With Manual Transmission
- Code 32, EGR System Error - 4.3L Turbo
- Code 32, EGR System Error - 4.3L With Linear EGR
- Code 33, Map Sensor Signal Voltage High
- Code 34, Map Sensor Signal Voltage Low
- Code 34, MAF Sensor Signal Voltage Low - 3.8L
- Code 35, Idle Speed Error
- IAC Valve Reset Procedure
- Code 36, Shift Control Problem - 3.8L
- Code 38, Brake Switch Circuit - 3.8L
- Code 38, Knock Sensor Circuit Open - 4.3L "S" & "T" Series Pickup With Manual Transmission
- Code 39, TCC Circuit - 3.8L
- Code 39, Knock Sensor Circuit Shorted - 4.3L "S" & "T" Series Pickup With Manual Transmission
- Code 41, Cam Sensor Circuit - 3.8L
- Code 42, Electronic Spark Timing (Except 3.8L)
- Code 42, Electronic Spark Timing - 3.8L
- Code 43, Electronic Spark Control With Spark Control Module
- Code 43, Electronic Spark Control Without ESC Module (Single Sensor) - Except 4.3L "S" & "T" Series Pickup With M/T & 4.3L CPI
- Code 43, Electronic Spark Control 4.3L "S" & "T" Series With M/T & "L" & "M" Series With 4.3L CPI
- Code 44, Lean Exhaust Indication (Except 4.3L Turbo)
- Code 44, Lean Exhaust Indication - 4.3L Turbo
- Code 45, Rich Exhaust Indication (Except 4.3L Turbo)
- Code 45, Rich Exhaust Indication - 4.3L Turbo
- Code 51, Faulty Prom/Mem-Cal
- Code 52, Faulty CALPAK
- Code 53, System OVERVOLTAGE (Except 3.8L)
- Code 55, ECM/Pcm Error
- Codes 53, 54 & 55, EGR Fault - 3.8L
- Code 54, Fuel Pump Circuit
- Code 56, Quad-Driver "B" Fault 3.8L
- Quad-Driver Related Symptoms
- Code 61, Cruise Vent Solenoid - 3.8L
- Code 62, Cruise Vacuum Solenoid - 3.8L
- Code 63, Cruise System Problem - 3.8L
- Code 65, Cruise Servo Position - 3.8L
- Code 66, Low A/C Refrigerant Charge - 3.8L
- Code 67, Cruise Engage Switches - 3.8L
- Code 68, Cruise System Problem Using Tech 1 - 3.8L
- Code 69, A/C Head Pressure Switch - 3.8L