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.
1996 Ford Explorer 4D Utility, 4.0 X, 4WD, AutomaticFACTORY OEM SERVICE PROCEDURE
Section 37 (Engine Controls - Tests W/Codes)
WARNING: This page is about a different car, the 1995 Mazda RX-7. However, it is still accessible from the selected car via links, so may be relevant.
- Introduction
- Self-Diagnostic System
- Trouble Code Identification Charts
- Trouble Code Charts
- Notes
- Code 2: Crankshaft Position Sensor - Ne Sensor
- Code 3: Crankshaft Position Sensor - G Sensor
- Code 5: Knock Sensor
- Code 6: Vehicle Speed Sensor
- Code 9: Engine Coolant Temperature Sensor
- Code 11: Intake Air Temperature Sensor
- Code 12: Throttle Position Sensor - Full Range
- Code 13: Manifold Absolute Pressure Sensor
- Code 14: Barometric Absolute Pressure Sensor - In ECM
- Code 15: Oxygen Sensor - Inactivation
- Code 17: Oxygen Sensor - Inversion
- Code 18: Throttle Position Sensor - Narrow Range
- Code 20: Metering Oil Pump Position Sensor
- Code 23: Fuel THERMOSENSOR
- Code 25: PRC Solenoid Valve
- Code 26: Metering Oil Pump Stepping Motor
- Code 27: Metering Oil Pump
- Code 30: Split Air By-Pass Solenoid Valve
- Code 31: Secondary Air By-Pass Valve
- Code 32: Secondary Air Switching Valve
- Code 33: Port Air By-Pass Solenoid Valve
- Code 34: Idle Air Control Solenoid Valve
- Code 37: Metering Oil Pump
- Code 38: Accelerated Warm-Up System Solenoid Valve
- Code 39: Relief 2 Solenoid Valve
- Code 40: Purge Solenoid Valve
- Code 42: Turbo Pre-Control Solenoid Valve
- Code 43: WASTEGATE Control Solenoid Valve
- Code 44: Turbo Control Solenoid Valve
- Code 45: Charge Control Solenoid Valve
- Code 46: Charge Relief Solenoid Valve
- CODE 50: DOUBLE THROTTLE CONTROL SOLENOID VALVe
- Code 51: Fuel Pump Relay - Speed
- Code 54: Air Pump Relay
- Code 71: Fuel Injector - Front Secondary
- Code 73: Fuel Injector - Rear Secondary
- Code 76: Slip Torque Converter Clutch Operation Off Signal
- Code 77: Torque Reduced Signal
- Summary
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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