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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSPONTIAC1994FIREBIRD TRANS AM GT, 2D COUPEREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES - 5.7L
1994 Pontiac Firebird Trans Am GT, 2D Coupe
Engine Controls - Tests W/Codes - 5.7L
1994 Pontiac Firebird Trans Am GT, 2D CoupeSECTION Engine Controls - Tests W/Codes - 5.7L
- Introduction
- Self-Diagnostic System
- ECM/Pcm Code Charts
- Notes
- Code 11, Malfunction Indicator Light
- Code 13, Open Oxygen Sensor Circuit
- Code 14, Coolant Temperature Sensor Signal Voltage Low
- Code 15, Coolant Temperature Sensor Signal Voltage High
- Code 16, OPTI-Spark Ignition System Low Resolution Pulse
- Code 18, Injector Circuit
- 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
- Code 25, Mat Sensor Signal Voltage Low
- Code 26, Canister Purge Solenoid
- Code 27, EGR Solenoid Valve
- Code 28, Transmission Range Pressure Switch
- Code 29, Secondary Air Injection
- Code 32, EGR System Error
- Code 33, Map Sensor Signal Voltage High
- Code 34, Map Sensor Signal Voltage Low
- Code 35, IAC Idle Speed Error
- Code 36, OPTI-Spark High Resolution Pulse
- Code 37, TCC Brake Switch Error
- Code 38, TCC Brake Switch Error
- Code 41, OPTI-Spark IGN SYS Open Or Shorted Est Circuit
- Code 42, Ic Circuit Grounded
- Code 43, ESC Error
- Code 44, Lean Exhaust Indication
- Code 45, Rich Exhaust Indication
- Code 46, Pass-Key Circuit
- Code 46, Pass-Key Diagnosis
- Code 47, Knock Sensor Module
- Code 48, Mass Airflow Sensor
- Code 50, System Voltage Low
- Code 51, Faulty Prom/Mem-Cal
- Code 52, Faulty Cal-PAK
- Code 53, System Voltage High
- Code 55, Pcm Error
- Code 55, Fuel Lean Monitor
- Code 58, Transmission Temp Sensor High Temp
- Code 59, Transmission Temp Sensor Low Temp
- Code 63, Right Oxygen Sensor Open
- Code 64, Right Oxygen (O2) Sensor Lean
- Code 65, Right Oxygen (O2) Sensor Rich
- Code 66, A/C Pressure Sensor
- Code 67, A/C Pressure Sensor
- Code 68, A/C Relay Circuit Shorted
- Code 69, A/C Compressor Relay
- Code 70, A/C Compressor Relay Driver
- Code 71, A/C Temperature (Circuit Open Or Shorted)
- Code 72, VSS
- Code 73, Pressure Control Solenoid
- Code 74, Traction Control Voltage Low
- Code 75, Transmission Voltage Low
- Code 77, Primary Cooling Fan Driver
- Code 79, Transmission Fluid OVERTEMP
- Code 80, Transmission Component Slipping
- Code 81, 2-3 Shift Solenoid
- Code 82, 1-2 Shift Solenoid
- Code 84, 3-2 Control Solenoid - A/T
- Code 84, Skip Shift Solenoid - M/T
- Code 90, TCC Solenoid Circuit
- Code 91, Skip Shift Light
- Code 97, VSS Output Circuit
- Code 99 Tach Output Circuit
- Summary
- Wiring Diagrams
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra 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.