P0171 cel system too lean bank 1 jump to latest follow 1 11 of 11 posts. You can search the internet for a free repair guide and find a lot of useful information, but this is not always possible if you are on the road at the time. P0171 ford tech notes if the p0171 is combined with the p0174 code, its very likely that the problem is caused by an intake leak. P0171 2009 ford focus tech notes if the p0171 is combined with the p0174 code, its very likely that the problem is caused by an intake leak. Come join the discussion about svt performance, modifications, classifieds, troubleshooting, maintenance, and.
I have already done by basic research on these cars. The check engine light just recently came on and it only read one code p0171 ive changed the maf sensor the o2 sensor the spark plugs and the air filter it rides better but it still loses power when stopped. P0171, p0174 check engine codes possible electrical problem. There are many things that can cause the p0171 trouble code on the ford focus.
Print, read or download a pdf or browse an easy, online, clickable version. What does code p0171 on a 2005 ford focus means answers. P0171 ford fuel injection system too lean bank 1 with the airfuel mixture ratio selflearning. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter. I have a 2005 ford escape that show s a p0171 obdii code and p2195 code. P0171 fuel trim system lean bank 1 p0171 ford obdii trouble codedescription. Access quick reference guides, a roadside assistance card, a link to your vehicles warranty and supplemental information if available. Find your owner manual, warranty here, and other information here. Step 1 once a check engine or service engine soon light has determined a lean engine code has materialized, a repair procedure inspection is needed. A p0171 lean code for bank 1 is the cylinder bank on the right passenger side of the engine on ford vehicles with a v6 or v8 engine and rearwheel drive. The car would cruise along at speed just fine but when id accelerate at speed it would stumble every time. This 05 focus had missfire and lean fault codes due to leaking egr valve. System too lean p0171, p0174 vacuum leak quick test ford.
The p0171 code means that, on the first bank of the engine, the fuel system is running weak or a vacuum leak exists near this side of the engine. I have a 2000 focus zx3 and when i drive it runs great but when i stop at a stop signal or stop sign it starts to lose power and sometimes shuts off. I tried cleaning the mass air flow sensor, tightening caps, looking for vacuum leaks on my 2005 ford focus zx3 s, 2. Its hard to find a p0171 leak on these newer cars because of the plastic intake manifolds. The whooshing sound is conducted by the plastic manifold, making it harder to listen for a leak. View and download ford focus 2005 o wners manual online. Some of the safety features available with ford focus are frontimpact airbags, occupancy sensors, sideimpact bars, front seatbelt. I have a 2006 ford focus and lately when i start my. But i still have some doubt, like engine reliability, or any other common problems that i should expect. Reads out a p0171, when system at normal temp, will not idle.
I also replaced myself the fuel filter,air filter,plug wires,both o2 sensors and gas cap,i still had the light. Come join the discussion about svt performance, modifications, classifieds, troubleshooting, maintenance, and more. So this engine code article applies to toyota, chevrolet, ford, nissan, honda, gmc, dodge, etc. Complete manual transmissions for ford focus for sale ebay. Ford focus service repair manual ford focus pdf downloads. Ive had this problem for 2 years now, every winter its the same thing, whenever the car is running and i press the clutch, the revs go up to 2000 and stay there until the car comes to a complete halt, at which point, it drops down to normal. I have a 2005 ford escape that shows a p0171 obdii code and. There are also some less likely problems that can cause p01. Obdii codes p2195 and p0171 appear 2005 p0171 focus p219. It is letting you know that there is an issue with the wiring or harness going to the sensor, or the sensor itself is bad.
Another known issue in ford vehicles is a vacuum leak from a ripped through. New ford bronco likely getting sevenspeed manual transmission. Im thinking the maf sensor is dropping out at the low end. Ford focus p0171 obdii trouble code diagnosis drivetrain. Take a look around and see if you can find the vacuum leak. A forum community dedicated to ford focus owners and enthusiasts. The obdii trouble code p0171 system too lean bank 1 means that the engine airfuel mixture is too lean, or there is too much air and too little fuel. I erased all trouble codes drove vehicle 10 miles and p0401,p2195 came back. The how can you fix this depends on which components in the system are malfunctioning and because there are multiple components involved, you have to go through a step by step exam.
Any air leaks in the snorkel between the maf and the throttle body can definitely cause a p0171. I see this code a lot on fords and it ss nearly always a vacuum leak in a rubber hose or connector. How to fix a lean exhaust codes in under 15 minutes. Having the trouble code p0171 system too lean in your car. For more information on this topic, i have written a field manual called. Checking the long term fuel trim values for bank 1 and bank 2 with your scan. Code p0171 system too lean bank one the focus had a problem with the pcv tube collapsing. This article will help you to diagnose diagnostic trouble code p0171 system too lean bank 1 andor p0174 system too lean bank 2 on your ford, mercury or lincoln 4. Consult your service manual for its location if you need help. Vacuum leaks with the ford focus, one of the most common cause for the p0171 code to show is a vacuum leak. Ford focus free shipping to commercial business only. When i would sit at a light at idle it would idle down very. P0171 on ford focus ricks free auto repair advice ricks.
Download your free pdf file of the 2005 ford focus on our comprehensive online database of automotive owners manuals. It is important to complete the entire diagnostic process when diagnosing p0171. System too lean bank 1this lack of fuel is known as a lean mixture. What could be better than a highquality ford focus fuel pump offered. P2195 and p0171 occur when the engine is running too rich too much fuel relative to air charge and the engine feedback system is unable to compensate.
P0171 cel system too lean bank 1 ford focus st forum. If you need some work done on a ford vehicle, then you will find all the information you need in a ford service manual. Ford code p0171 severity moderate it is okay to drive your ford with p0171 for a short period of time, but driving with this code for an extended period of time can overheat the engine and cause internal engine damage. Another known issue in ford vehicles is a vacuum leak from a rippedthrough. Ford focus is a small family car from ford motor company since 1998. P0172 error on a ford focus ask honest john honest john.
Lean condition diagnosis on a ford p0171 p0174 duration. Step by step guide on how to repair automobile lean code problems, this article pertains to most vehicles. Begin with the vehicle parked on flat ground in park with the emergency brake set. Lean code p0171 means there is too much air or not enough fuel in the airfuel mixture. Ford focus p06 engine trouble code when the check engine light comes ford focus p06 code on the first you should check is the gas cap. However, youre unlikely to see that translate to cheaper fuel in the uk. Although you can apply this info to any ford vehicle with a v6 or v8, this info concentrates on the ford 4. Audio systems replacement keys the check engine gauges vehicle symbol glossary instrument cluster passive antitheft system warning lights and chimes. Driving a car with the code p0171 can cause more damage to the engine over time, as when the engine runs lean, the combustion temperature is higher. Mk3 question for those with 5 speed manual idle related. My 2005 focus zx3 is giving codes p0193 and code p0171. You can see in the manual that ford has a special 02 wrench.11 639 962 77 417 374 144 1327 1342 865 1215 1087 780 704 563 626 620 510 1595 1514 778 927 290 1074 150 874 996 1324 1437 651 1115 799 150 1205