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.
1992 GMC Safari Van Cargo, 4.3 Z, AWDFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes - V6
- Introduction
- Self-Diagnostic System
- Trouble Code Charts
- Notes
- Code 13, Open Oxygen Sensor Circuit
- Code 14, Coolant Sensor Signal Voltage Low
- Code 15, Coolant Sensor Signal Voltage High
- Code 21, TPS Signal Voltage High
- Code 22, TPS Signal Voltage Low
- Code 23, Mat Sensor Temp. Low
- Code 24, Vehicle Speed Sensor
- Code 25, Mat Sensor Temp. High
- Code 31, Turbo OVERBOOST (4.3L Turbo)
- Code 32, EGR System Error
- 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 35, Idle Speed Error 2.5L & 4.3L Turbo
- Code 42, Electronic Spark Timing (Est)
- Code 43, Electronic Spark Control
- Code 44, Lean Exhaust Indication
- Code 45, Rich Exhaust Indication
- Code 51, Faulty Prom/Mem-Cal
- Code 52, Faulty CALPAK (Except 2.5L)
- Code 53, System OVERVOLTAGE (2.5L)
- Code 54, Fuel Pump Circuit
- Code 55, ECM Error (Except 2.5L)
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.
Rather have a pro handle this?
A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.
Comes to youSame-day available12-month warranty
Get a Free QuoteNo obligation. See pricing before you book.