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P0108 - Barometric Pressure/Manifold Absolute Pressure (BARO/MAP) Sensor High Voltage Detected Description: Sensor operating voltage is greater than 5 volts (VREF). As a result it failed above the maximum allowable calibrated parameter. Possible Causes:
  • VREF shorted to VPWR.
  • MAP signal shorted to VPWR.
  • VREF should be less than 6.0 volts. The PID reading is in frequency/volts.
  • Open circuit.
Diagnostic Aids: VREF should be greater than 4.0 volts.
The PID reading is in frequency/volts. Application Key On Engine Off Key On Engine Running Continuous Memory Vehicles with an EGR system module (ESM) GO to DM1 GO to DM1 GO to DM13 All others GO to DM16 GO to DM16 GO to DM22
Circuit problem .Not sensor .

P0401 - Exhaust Gas Recirculation (EGR) Flow Insufficient Detected Description: The EGR system is monitored during steady state driving conditions while the EGR is commanded on. The test fails when the signal from the differential pressure feedback EGR (DPFEGR) sensor indicates that EGR flow is less than the desired minimum. Possible Causes:
  • Vacuum supply.
  • EGR valve stuck closed.
  • EGR valve leaks vacuum.
  • EGR flow path restricted.
  • EGRVR circuit shorted to PWR.
  • VREF open to DPFEGR sensor.
  • DPFEGR sensor downstream hose is off or plugged.
  • EGRVR circuit open to the PCM.
  • VPWR open to EGRVR solenoid.
  • DPFEGR sensor hoses are both off.
  • DPFEGR sensor hoses are reversed.
  • Damaged EGR orifice tube.
  • Damaged EGRVR solenoid.
Diagnostic Aids: Carry out the key on engine running (KOER) self-test and look for DTC P1408 as an indication of a hard fault. If P1408 is not present, look for contamination, restrictions, leaks, and intermittent faults. Application Key On Engine Off Key On Engine Running Continuous Memory Vehicles with an EGR system module (ESM) - - GO to HH15 All others - - GO to HE36
Clogged catalytic converter ?

Ford Cars &... | Answered 13 minutes ago

Easy way to tell is to remove the current sending unit and find out.

2005 Ford Escape... | Answered 3 hours ago

Under the hood. fuse panel. You will need the owners manual to find it though. Ford doesn't mark their panels.

Ford Cars &... | Answered 3 hours ago

Undr steern colum thers a blacbox w electronics..ucan pullout speakr carefully or cover it w tape to lessen sound

1998 Ford... | Answered 3 hours ago

Ford Cars &... | Answered 4 hours ago

owner manual.

here's the big ones for 1994 ranger. all i have
Section 18-01: Wiring and Circuit Protection 1994 All Ranger, Explorer and Aerostar Vehicles Workshop Manual

High Current Fuses And Circuit Breaker — Ranger 2.3L, 3.0L And 4.0L
Circuit Size Location Electric Fuel Pump 20 Amp Fuse Power Distribution Box Headlamp Switch Feed 40 Amp High
Current Fuse Power Distribution Box #36 Circuit Alternator Output #2 15 Amp Fuse Power Distribution Box Fuse Panel 60 Amp High
Current Fuse Power Distribution Box Power Locks 20 Amp High
Current Fuse Power Distribution Box #38 Circuit Alternator Output #1 12 Ga Fusible
Link Integral with 14305 W/A Powertrain Control Module and Power Relay 30 Amp High
Current Fuse Power Distribution Box 4x4 Electric Shift 20 Amp High
Current Fuse Power Distribution Box Ignition Switch Feed 60 Amp High
Current Fuse Power Distribution Box High Beams and High Beam Indicator 22 Amp C.B. Integral with Headlamp Switch Front Wiper and Washer 6 Amp C.B. In Fuse Panel Power Windows 30 Amp C.B. In Fuse Panel Cigarette Lighter, Flash to Pass and Power Lumbar 20 Amp C.B. In Fuse Panel


1992 Ford Ranger | Answered 18 hours ago

Check to make sure wheel nuts are tight. Bleed power steering system. Bad tire weaer. Start with that.

Ford Cars &... | Answered 19 hours ago

If it is a factory fitted alarm and immobilizer, you can't. If is an aftermarket system, you have to take it to an installer for that make and have it removed professionally. I wrote this tip a while back

Want to bypass your vehicle security system?
The short answer is you can't!

All modern cars have alarms and immobilizers. There is a chip in the key and a chip in the ignition lock. If both are present, the ECM (engine control module) releases power to the ignition circuit. When you turn the key, the starter spins the engine and you get a spark. If any one of those three items are not in the chain, you get the engine to turn, but no spark. There is no way to beat the system. You have to fix what is wrong, not find a way around it.

The immobilizer is in place to stop exactly what you are trying to do.

Ford Ranger Cars... | Answered 21 hours ago

All the relays are under the hood on these rangers, but you problem may be with the control box behind the jump seat on the drivers side. You may have to remove the jump seat to get to it. Once there, the box will have a white,grey or black button on it. Usually on the end where the red light is, Turn the key on and press this button and hold for 5 seconds. This puts the 4 wheel drive shift motor back in sequence. Now without starting the engine and the trans in park if auto and neutral if standard park break set, try the to shift in to 4 high, if you can hear the shift motor run and shift the gears in the transfer case, try 4 low, you should hear the same motion in the transfer case, if so you have solved your problem. If not you may have to move on to the connector on the transfer case, you may have to unplug the connector and look at the pins and socket, if they look corroded, clean and apply some dielectric grease to the pins and the socket and plug back in. Try the 4 High and 4 low again. If it works, great, if not you may have a bad shift motor.
Good luck.

1998 Ford Ranger | Answered Yesterday

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