20 Most Recent 2000 Ford F150 Flareside SuperCab - Page 9 Questions & Answers

Please see my tip at http://www.fixya.com/cars/r6234839-doesn_t_heater_or_air_conditioner_blow . These are genericinstructions. If you get stuck or need specific instructions for your car, please get back to me with model, year and engine info.

DTC P0171 - System Too Lean (Bank 1)
Basically this means that an oxygen sensor in bank 1 detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1.

Note: This DTC (Diagnostic Trouble Code) is very similar to P0174, and in fact your vehicle may show both codes at the same time.

I would suggest that you take a look at the front oxygen sensor. Typically speaking the oxygen sensor causes this code to appear. Here is the possible cause list from the manual for your car.

Trouble Code: P0171 - Fuel System Lean (Bank 1)

Possible Causes:
Air leaks in intake manifold, exhaust pipes or exhaust manifold
Base engine mechanical problem causing a lean A/F condition
Fuel control Sensor is out of calibration (e.g., ECT, IAT or MAP)
Fuel delivery component fault (clogged filter, low fuel pressure)
O2 element is contaminated, deteriorated or it has failed
Vacuum hose is disconnected, broken, leaking or loose

Hope this helps (remember to rating this answer ans leave us a testimonial comment). Thank you for using FixYa.

My ac was working great put heat on now my ac won't get cold.

Inside the tank.

Power as in 12 V DC ? if yes, you are not in the correct area, the front axle is locked in and out of 4x4 mode with vacuum.

Operationally vacuum shifts the front axle between 2WD and 4WD mode. The GEM ( Generic Electronics Module ) applies ground to the solenoid needed for the mode selected on the switch ( for ESOF ) or when the transfer case shift lever is moved ( MSOF ).The contact plates in the transfer case signal the GEM that the transfer case is engaged, and the Vacuum solenoids need to be activated ( either 2WD to 4WD or 4WD to 2WD ).


Lift and support the front of the truck so the front wheels are off the ground ( take safety precautions, chock wheels, jack stands, etc )
Key on, engage 4x4 and try to turn the front drive shaft.
- If it turns it is a problem with the transfer case.
- If it doesn't it is a front axle engagement problem.

- If the front drive shaft does not turn :
•With the truck running ( with front wheel back on the ground ), switch from 2WD to 4WD and back again, the vacuum shift motor should move the lever on the front axle.

Item #10 in this diagram

-- If the vacuum shift motor does not move:
1.Check for vacuum on the lines while shifting between modes. Pink vacuum line is 2WD mode, Light Blue vacuum line is 4WD.
2.Check the fuses for the 4WD system and the solenoids.
3.Check the vacuum lines from the vacuum shift motor to the solenoids on the firewall.
4.Check the vacuum lines from the solenoids to the vacuum reservoir box behind the battery.
5.Check the vacuum reservoir box for cracks.
6.Typical solution is the vacuum lines ( to the solenoids or to the vacuum shift motor ) are cracked or the vacuum shift motor has a cracked diaphragm and has water in it.
7.Could be the shift plate contacts in the transfer case are corroded / not making good contact, and not activating the solenoids.


- If the front drive shaft turns:
For ESOF system
-- Check the fuses for the transfer case, engine compartment fuse panel, 17 & Cab fuse panel fuses 13 and 23 ( verify with owners manual, 97-97 & 99-03 MY can be slightly different on some items ).
-- Try hitting the transfer case with a dead blow hammer ( do not use a metal hammer, it can damage the transfer case ) to see if the transfer case shift motor is hung up .
-- Check the transfer case connector, to make sure the connector pins are clean and making good contact.
For MSOF systems
-- Check that the shift linkage on the transfer case is moving when the lever is moved from 2W to 4H and 4L.

7 pin I assume

You likely have a burned out bulb in one corner of your car. This NO FLASH, is the warning Ford gives you when a bulb is out.

I hope you had change the thermostat with the same heat range with old one. If you there is no liquid flow, you need to check the liquid/water pump. In long time use , the water pump can get weared on its impeller / blades. Another thing need to check is your coolant/radiator fan. Why the the terminal in relay box get melted? It can tell us two things. the first is LOOSE connection ( please the power connection - it should secured fitted). Second thing is your FAN. Is it running smooth? If your fan running rough and noisy, the bearing could be a problem. If it running intermittently the carbon brush coukd be a problem.So please narrow down the problem first before get it fixedBest Luck

http://www.obd-codes.com/p0453

go to batauto.com

Good directions with pictures on removing the door panel and mirror heads from Muth Signal mirrors
http://www.muthco.com/support/manuals/
Search on the page for the MY range and type under the Ford section.

Good directions with pictures on removing the door panel and mirror heads from Muth Signal mirrors
http://www.muthco.com/support/manuals/
Search on the page for the MY range and type under the Ford section.

SOUNDS LIKE LOOSE WIRES AT STARTER OR GROUNDS TO ENGINE BLOCK
ALSO MAKE SURE BATTERY CONECTION ARE TIGHT AND CLEAN
IF ALL THIS CHECKS OUT HAVE STARTER BENCH TESTED