Ford 4.0L Index of Articles

How to Test a Misfire Problem (Ford 4.0L V6)

How to Test a Misfire Problem (Ford 4.0L V6)

One of the most common problems you're gonna' experience on your 4.0L equipped Ford is a misfire condition causing one or more of the following misfire codes: P0300, P0301, P0302, P0303, P0304, P0305, and/or P0306. Although quite a few things...   read more >>

How to Test the Blower Motor Switch (Ford 4.0L)

How to Test the Blower Motor Switch (Ford 4.0L)

Troubleshooting the blower switch on your Ford Explorer's A/C Heater control panel isn't hard. All you need is a multimeter and to know what blower switch terminals should have continuity when you turn the knob to the various speeds (on the...   read more >>

How To Test: P0117 OBD II Trouble Code (Ford 4.0L)

How To Test: P0117 OBD II Trouble Code (Ford 4.0L)

OBD II trouble code P0117 ECT Sensor Circuit Low Voltage is telling you that your 4.0L equipped Ford vehicle's fuel injection computer is seeing a continuous engine coolant temperature of 250°F (121°C) or higher. The two most common...   read more >>

How to Test the Blower Motor Resistor (Ford 4.0L)

How to Test the Blower Motor Resistor (Ford 4.0L)

If the blower motor only runs in HI or one of the blower speeds is not working... then there's a good chance that the blower motor resistor assembly is bad. Thankfully, the blower motor resistor on your Ford Explorer (Ranger, Mercury...   read more >>

How to Test the Fuel Pump (Ford 4.0L Aerostar, Ranger, Explorer)

How to Test the Fuel Pump (Ford 4.0L Aerostar, Ranger, Explorer)

If the fuel pump fails in your Ford 4.0L V-6 equipped SUV or pick up... it's not gonna' start and run. Thankfully, Ford has made it super easy to test the fuel pump on your 4.0L Explorer (4.0L Ranger, 4.0L Aerostar or 4.0L Mountaineer) and in...   read more >>

How to Test the A/C Heater Blower Motor (Ford 4.0L)

How to Test the A/C Heater Blower Motor (Ford 4.0L)

Your Ford Explorer's (Aerostar, Ranger, B4000, Mountaineer, Mountaineer) blower motor is a simple 2-wire component that can be easily tested by manually applying battery power and ground to it. If your 4.0L Ford Explorer (Aerostar, Ranger,...   read more >>

How to Troubleshoot a No Start (Ford 4.0L)

How to Troubleshoot a No Start (Ford 4.0L)

Testing a Cranks but Does Not Start condition on your 4.0L Ford Explorer (Aerostar, Ranger, Mountaineer) doesn't have to be hard. In this tutorial, I'll go into the basics of a No Start Condition and show you some of the step-by-step tutorials...   read more >>

Troubleshooting P0171 and P0174 (Ford 4.0L V6)

Troubleshooting P0171 and P0174 (Ford 4.0L V6)

This article will help you to diagnose diagnostic trouble codes P0171 (System too Lean Bank 1) and/or P0174 (System too Lean Bank 2). One of the biggest misconceptions, about these two diagnostic trouble codes, is that they accuse the oxygen...   read more >>

Testing the Oxygen Sensors on Your Ford 4.0L

Testing the Oxygen Sensors on Your  Ford 4.0L

Testing the upstream oxygen sensors (O2S11 and O2S21), on your OBD II equipped 4.0L Ford Aerostar, Explorer, Ranger, or Mountaineer, can be accomplished in a few easy steps and in this article I'll show you how. As you might already be aware, if...   read more >>

How To Test: P0118 OBD II Trouble Code (Ford 4.0L)

How To Test: P0118 OBD II Trouble Code (Ford 4.0L)

OBD II trouble code P0118 ECT Sensor Circuit High Voltage is set when the PCM in your Ford sees a fixed engine coolant temperature of -4 to -46°F (-20 to -43°C) that doesn't correspond to actual engine operating conditions. In this...   read more >>