20 Most Recent 2001 Ford Expedition Questions & Answers

This code has to with the TCC - Torque converter clutch
P1744 TCC TCC The PCM picked up an excessive amount of TCC slippage during normal vehicle operation. TCC slippage/erratic or no torque converter clutch operation. Refer to Diagnosis By Symptom in this section. You'll need to pull the transmission out an replace the torque converter ! Your better off taking to transmission shop an having a proper diagnosis done !

2001 Ford... | Answered on Apr 27, 2019

i just had the same problem with my f 150 ( 1999), my wipers, washer fluid pump, dome light, door chime stopped, I went thur the manuals, Checked appropated fuses, even changed wiper motor, (nothing worked) out of much internet checking, talking to mechanics, I got frustrated, I started pulling all the fuses under the dash,, I pulled # 15 ,a 5 amp fuse, which has nothing to do with the wipers eletronics, it was a good fuse, when i put it back in, everything came back and working fine. nearest i can figure it was either loose or a dirty contact.

#15 fuse (5 amps) on my box is for : stop lamp switch,( speed control,brake shift interlock,ABS, pcm module inputs.gem module,RABS test connector)
this was just blind luck, maybe it will help you.

2001 Ford... | Answered on Apr 09, 2019

Light weight edition

2001 Ford... | Answered on Feb 28, 2019

go to a junk yard they will be happy to help you out-Denny

2001 Ford... | Answered on Jan 20, 2019

there should be fuses near your amp and near the battery

2001 Ford... | Answered on Jan 17, 2019

It is usually alternator trouble, but there are some rare cases where battery and alternator are okay but there is a loose or corroded joint in the wiring harness between the battery and the area where the battery light gets its voltage signal; this is usually downstream of a large bulkhead multipoint plug near the fusible links etc. The resistance from a bad connection at this point causes a loss of voltage due to the current flowing to the fuel injection pump, a/c, lights etc. It gets worse and when bad enough it will stall you. Get it identified by a competent auto electric shop before it strands you.

2001 Ford... | Answered on May 04, 2018


2001 Ford... | Answered on Feb 05, 2018

Try the switch on the brake pedal bracket. When this switch gets bumped out of position by the drivers feet it causes difficulties. Check your under-dash fuse panel. Seen that many are bumped and window control relays are half hanging out of fuse panel.

2001 Ford... | Answered on Feb 02, 2018

try this website reliable-store.com
they help you with all this stuff, ask the girl at the bottom for help

2001 Ford... | Answered on Jan 29, 2018

Throttle position sensor or throttle body is very dirty from cheap gas clean the throttle body with fuel injection cleaner and put it in the gas tank every week for a month use Berrimans fuel system cleaner start with 2 cans and a high quality premium gas Exxon shell bp mobile and then go to 1 can every tank full then after a month go to 1 can a month but stay on the 93 octane the higher the octane rating the more stable and slower the fuel burns and the higher quality gas has detergents in it to help keep it clean also change the gas filter again after 2 months because the Berriman cleaner will clear up the whole emissions system and this is recirculated back to the vacuum canister then back into the tank for it to be reburned again so the filter will catch any varnish sludge micron particles coming through now if you've done all of this and you've got the problem solved great if not please post back to me and I'll go further with you until it's solved you must understand that I'm not there to check myself so I don't have a good vision of what is wrong so Im trying to rule out some of the possibilities of what is wrong and your truck will improve its mpgs from the system cleaner and I think that the throttle position sensor has a worn-out contact spot in the idle position that is always used at the stopped for a light or stop sign position also check vacuum lines for cracks and 1 more thing take out each spark plug and check the gap it could be to far and at idle the firing spark is missing but at higher speeds it can compensate for it from a more rapid firing and check the boots by squeezing them and looking for cracks or really soft ones are letting the +spark escape to - ground and look for any moisture on them so you have a process of eliminating a few things and I hope the problem is fixed for you and if not get back to me as mentioned above and we'll get there so you know I'm a taxi mechanic in nyc.with 50 years experience in all phases of automotive systems and a ford specialist that dealer chief mechanics come to me when computers can't find the problems with the vehicle also after we solve your problems I can teach you and others who come across this post other things to do for optimum performance of your truck I have 4.6 & 5.4 motors with 300,000 + and some in 400,000 miles range that are still fast when we take them out of service so good luck and write down everything you do so we can rule out possible causes and have fun learning about the machine your driving yes machine it's gas driven but controlled by electrical voltage monitoring sensors that your computer sends commands to operate it all the best stephen

2001 Ford... | Answered on Jan 22, 2018

check all your fuses under dash and under hood even if the light is flashing the bulb may have a damaged filament causing the flashers to work rapidly

2001 Ford... | Answered on Dec 03, 2017

There are a lot of solenoids in cars. What code did you get or what led you to the store that told you that. How did they arrive at that?

2001 Ford... | Answered on Nov 30, 2017

Just a question. Do you run your car on empty. If so that could be your problem with an empty tank you are sucking all the dirt through the filter and making it plug up. It is better to keep your tank above half full and does not cost any more than to run on empty. All mechanics will tell you to always keep your tank above half full.

2001 Ford... | Answered on Nov 28, 2017

I am guessing that you are speaking of a noise in the front and this is a 4x4? If so, then you are most likely looking for a bad cv joint. We really need more information though.

2001 Ford... | Answered on Nov 14, 2017

If you have a telephone function it could be muting the sound system for a telephone call.

2001 Ford... | Answered on Nov 11, 2017

Vacuum control motors are used to position these airflow control doors.
SECTION 412-01: Air Distribution and Filtering 2000 Expedition/Navigator Workshop Manual DESCRIPTION AND OPERATION Procedure revision date: 06/17/1999 Air Distribution There are two sources of air available to the air distribution system:
  • outside air
  • recirculated air
Recirculated air is only used during MAX A/C, AUTOMATIC (if equipped with EATC) and OFF modes.
Air distribution within the vehicle is determined by the function selector switch position, if equipped with manual A/C, or is controlled by the electronic automatic temperature control system in the AUTOMATIC mode but can be overridden by the driver if desired. Airflow control doors are used to direct airflow within the heater air plenum chamber. Vacuum control motors are used to position these airflow control doors.
The air distribution system is designed to provide airflow from the defrost nozzle when no vacuum is applied to any of the vacuum control motors. This is done to prevent a situation where defrost cannot be obtained due to a system vacuum leak.
Air enters the passenger compartment from the:
  • instrument panel A/C registers.
  • heater outlet floor duct.
  • windshield defroster hose nozzle.
  • side window demisters.
  • rear seat airflow duct (if equipped).
Passenger compartment air is exhausted from the vehicle through open windows or cab air vents.

expedition air flow hvac system-xvcmtr1jbqa4kfrdszeh0lpe-3-0.gif Item Part Number Description 1 18A318 Vacuum control motor - panel/defrost door 2 18A478 Panel/defrost door (full vacuum position) 3 - Defrost airflow 4 - Side window demister airflow 5 18B545 Temperature blend door (full heat position) 6 19860 A/C evaporator core 7 19A813 Air inlet duct door (full vacuum position) 8 - Outside air inlet 9 18A318 Vacuum control motor - air inlet duct door 10 - Recirculated air inlet 11 19805 Blower motor 12 - Vacuum to emission control 13 - Vacuum from the engine intake manifold 14 19A563 A/C vacuum check valve 15 19A566 A/C vacuum reservoir tank and bracket 16 19B888 A/C-heater function selector switch 17 18476 Heater core 18 18A559 Floor/panel door (full vacuum position) 19 - Floor airflow 20 18A318 Vacuum control motor - floor/panel door 21 - Panel vent airflow
Check vacuum control to the panel defrost motor ( vac,diaphragm )

2001 Ford... | Answered on Nov 01, 2017

For each code there is a diagnostic testing procedure . Without doing the testing we would only be guessing as to the problem . Sounds like you know next to nothing about automobile engine management systems . Your best bet ,take it to a qualified repair shop .
P0443 - EVAP Control System Canister Purge Valve Circuit Malfunction The PCM monitors the state of the EVAP canister purge valve circuit output driver. The test fails when the signal moves outside the minimum or maximum limit for the commanded state.
  • VPWR circuit open
  • EVAP canister purge valve circuit shorted to GND
  • Damaged EVAP canister purge valve
  • EVAP canister purge valve circuit open
  • EVAP canister purge valve circuit shorted to VPWR
  • Damaged PCM
To verify normal function, monitor the EVAP canister purge valve signal PID EVAPPDC (or EVMV for electronic valve) and the signal voltage (PCM control side). With the valve closed, EVAPPDC will indicate 0 percent duty cycle (0 mA for EVMV) and the voltage approximately equal to battery voltage. When the valve is commanded fully open, EVAPPDC will indicate 100 percent duty cycle (1000mA for EVMV) and a voltage drop of 3 volts minimum is normal. Output test mode may be used to switch output ON/OFF to verify function.
P0135 - HO2S Sensor Circuit Malfunction (HO2S-11) During testing the HO2S Heaters are checked for opens/shorts and excessive current draw. The test fails when current draw exceeds a calibrated limit and/or an open or short is detected.
  • Short to VPWR in harness or HO2S.
  • Water in harness connector.
  • Open VPWR circuit.
  • Open GND circuit.
  • Low battery voltage.
  • Corrosion or poor mating terminals and wiring
  • Damaged HO2S heater.
  • Damaged PCM.
  • Wiring.
  • Damaged HO2S heater.
  • Damaged PCM.

P0155 - HO2S Sensor Circuit Malfunction (HO2S-21) See DTC P0135
P0755 * SSB, wiring, PCM SSB solenoid circuit failure SSB circuit fails to provide voltage drop across solenoid. Circuit open or shorted or PCM driver failure during on-board diagnostic. Incorrect gear selection depending on condition mode and manual lever position. See Solenoid On/Off Chart. Go To Pinpoint Test A .
P1747 * EPC, wiring, PCM EPC solenoid circuit failure, shorted circuit or output driver Voltage through EPC solenoid is checked. An error will be noted if tolerance is exceeded. Short circuit causes minimum EPC pressure (minimum capacity) and limits engine torque (alternate firm). Go To Pinpoint Test D .
P1401 - DPF EGR Sensor Circuit High Voltage Detected The EGR monitor checks the DPF EGR sensor signal to the PCM for high voltage. The test fails when the average voltage to the PCM goes to a voltage greater than the maximum calibrated value.
  • DPF EGR circuit open
  • VREF short to PWR
  • Damaged DPF EGR sensor
  • DPFEGR circuit short to PWR
  • SIG RTN circuit open
  • Damaged PCM
A DPF EGR PID reading greater than 4.5 volts with the key ON and engine OFF or running, indicates a hard fault.
P1451 - EVAP Control System Canister Vent Solenoid Circuit Malfunction Monitors the canister vent (CV) solenoid circuit for an electrical failure. The test fails when the signal moves outside the minimum or maximum allowable calibrated parameters for a specified canister vent duty cycle by PCM command.
  • VPWR circuit open
  • CV solenoid circuit shorted to PWR GND or CHASSIS GND
  • Damaged CV solenoid
  • CV solenoid circuit open
  • CV solenoid circuit shorted to VPWR
  • Damaged PCM
To verify normal function, monitor the EVAP canister vent solenoid signal PID EVAPCV and the signal voltage (PCM control side). With the valve open, EVAPCV will indicate 0 percent duty cycle and the voltage approximately equal to battery voltage. When the valve is commanded fully closed, EVAPCV will indicate 100% duty cycle and a voltage drop of 4 volts minimum is normal. Output test mode may be used to switch output ON/OFF to verify function.
Look's like you have multiple problems an to say what the problem could be would be guessing . Your best bet ,take it to a qualified repair shop .

2001 Ford... | Answered on Oct 17, 2017

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