Ford f150 p0171 obdii trouble code diagnosis drivetrain, Top ford f150 p0171 causes. If any concerns were found during inspection, repair as necessary. If the resistance is between 3 and 30 ohms, go to next step. If the resistance is greater than 5. You can repeat step 3 several times, if you need to make sure of your test result. This bracket is fastened onto a post that sticks out of the plenum.
If each resistance is less than 10,000 ohms, repair the short circuit. Note: If arcing occurs indicating a short , remove jumper and go to step 28 check fuse in the heater circuit. It looks like this: I will post next all the info for you to check. If the indicated value is less than the minimum threshold, go to next step. If the voltage is less than 1. If a concern is present, go to step 20. I do not guarantee that the information here will fix your vehicle's problem, so I cannot assume any liability for your mistakes or misfortune.
If any concerns were found during inspection, repair as necessary. The freeze frame data will be used to recreate the concern. Also the vacuum hose that connects the fuel pressure regulator to the intake manifold can swell and leak vacuum where the hose connects to the manifold. Click here for information about the completing the Comprehensive Component Monitor Repair Verification Drive Cycle. If the resistance is not between 11. Check air cleaner element, air cleaner housing for blockage.
If each resistance is greater than 10,000 ohms, go to next step. If the resistance reading is greater than 5. If the voltage reading indicates less than 0. If the leakage and flow are not within specification, replace the fuel injector. If the fuel pressure does not remain within 34 kPa 5 psi of the highest reading after 10 seconds, check fuel system for external leaks.
Remove both and mark them off. If the resistance is less than 5. P0171 And P0174 Essentials P0171: System Too Lean Bank 1. My driving conditions are about 70% city, 30% highway, which I think is a common ratio for most of us. There are 6 sets of holes.
We have had weather fluctuations from below freezing to mid 80s, and it appears that the new isolator bolts are holding strong and nothing has warped. If the leaking manifold gasket is confirmed following the diagnostics steps, it must be replaced. Disconnect secondary air injection hose s from engine and plug engine side of secondary air injection system. I battled this one for a year or so and found that Motorcraft idler pulleys 2 of them, one is on the tensioner which is bolted on using a reverse-threaded bolt! If no external leak is detected, go to step 36. You can also use a scan tool to diagnose fuel delivery problems that may be causing a lean code. If the resistance reading is greater than 5. Click here to refer to the Fuel Delivery System Test Information Chart.
If fuse is okay, repair the open in the circuit. The truck is still running as well as the day it was repaired back in 2008. The information provided is not endorsed or recommended by the Ford Motor Company. If the resistance is between 11. All brands mentioned belong to their respective owners. I have had the pleasure of talking with some of you who have performed this procedure, so it seems that word is getting around. Click here for Secondary Air Injection System diagnostics.
If the resistance is less than 10,000 ohms, repair the short in the harness. If your engine has a fuel delivery problem, the fuel trim values will become more positive as engine speed and load increase. The fix for is to clean the injectors. Allow the engine to stabilize at the temperature necessary to recreate the concern. If you have any questions, comments, suggestions, clarifications, or additions, please contact me.
If no concerns are found during the visual inspection, go to next step. If any concerns were found during inspection, repair as necessary. For the rest of us, cutting the upper portion was sufficient for me to have room to work on the back of the plenum. South Main Auto Repair assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. If you end up obliterating the one-way screw that holds it in like I did , throw it away, and use the small plastic zip-tie or the bolt+nut to secure it back on. If the resistance reading is less than 5.
If each resistance is less than 10,000 ohms, repair the short circuit. If fuse is okay, repair the open in the circuit. Click here for more information regarding its repair. Are any of the vacuum lines or hoses disconnected? Expect all of these to be cruddy and oily and carbonized. If the resistance is greater than 10,000 ohms, go to next step. If the resistance is greater than 5. A positive number tells you it's adding fuel.