You may be wondering where Bank 1 and Bank 2 are located on your Ford 4. Only then would a too-lean mixture be returned and logged as a fault P0171. Tech notes The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak. If you need professional assistance, feel free to talk to. The HeaterTreater alternative will solve the problem at a fraction of the cost and work and is well within the capability of the average shade tree mechanic.
Water should flow unobstructed through the core. Do not try to install without the lock clip, the connector will fall off! The engine computer has detected a lean condition! Check out HeaterTreater on Ebay or at heatertreater. To provide a better website experience, axleaddict. Need help with a P0174 code? If the problem is lack of heat, there are some things you need to eliminate before tearing into the truck. Replacing the the elbow with a suitable replacment from the auto part misc parts cards display had it running smoothly and the O2 sensor switching properly. The first step you need to do is Check the Oxigen O2 sensor Connections The front and the rear one. You need to make sure that coolant is flowing through the core.
Thank you for using FixYa. Leaks in the air intake may allow particles to enter the engine, which may be damaging. This seems rather unlikely but worth checking into all the same. I went to autozone they put it on the diagnostic machine and it gave the codes 0171 0174 1131 1151. P0171 - System to Lean Bank 1 The Adaptive Fuel Strategy continuously monitors fuel delivery hardware. This is a common problem on Ford trucks, but not real serious. One of the most common trouble codes with the Ford F150 is the P0174 code.
Test The Sparkplug When the engine misfires, almost-clean oxygen charge is sent to the exhaust system. The Adaptive Fuel Strategy continuously monitors the fuel delivery hardware. If an intermittent condition is suspected, refer to Intermittent Conditions. The most common problem is far and away the first one listed below. Parting Tips After making these repairs, clear the trouble codes and let the computer monitors reset by driving the vehicle at around 30 miles to get the right system functionality. To check for vacuum leaks, ask someone to start the engine and hold the idle for you at 1500 rpm. Take a look around and see if you can find the vacuum leak.
Here are the typical symptoms that something is wrong when you have code P0174. Also check the smaller vacuum lines that go to the evap control from the intake vacuum ports back of manifold just below the throttlebody, most will be cracking if your car is anything like mine. The Engine Control Module calculates the necessary compensation to correct the offset between the actual and the theoretical ratios. Now I'm getting my service engine soon light and getting lean codes for banks 1 and 2. Good luck figuring out what is wrong with your F150.
Consult your service manual for it's location if you need help. However, be aware that there is a possibility of the lean condition being caused by a leak in the intake system. Check Fuel condition, Replace fuel filter if need. Using a flammable Carb cleaner and the engine running I sprayed around the vacuum hoses until the idle picked up. If you recently had exhaust work done, this could be the cause of it. Where Are Bank 1 And Bank 2? This unmetered air entering the engine is usually due to a very large vacuum leak. This loop goes on and on as the engine runs.
The computer will then set the fuel flow and even other related operating characteristics of the system to maintain the right ratio of air and fuel combination. Refer to Section 1 , Powertrain Control Software, Fuel Trim for more information. I would suggest that you take a look at the front oxygen sensor. The intake system uses gaskets to seal its components. Generally, a lean condition is not that serious. It is worth the money here to put in the best plugs available! This is usually the cause of a P0171 code, but not the only.
Exhaust leaks by the O2 sensors. They have it buried in the plenum box and you have to remove the steering wheel, steering column, dash, evacuate the refrigerant system, drain the radiator, and remove the plenum box to get to the core. The most common cause of this is a defective mass air flow sensor. And Clear the Codes if averything is good. Replace this, clear the codes and do 2 driver cycles steady throttle up to 47 mph min, back to a stop and back up to 47 mph again. Now, having said that, I've geared this article towards the person that owns a generic scan tool with Live Data capability Don't have a scan tool? In case the amount of the compensation value is extremely large The actual mixture ratio is too lean.
This code is very similar to the error code P0171, some vehicles even show both codes simultaneously. It's possible but highly unlikely that P0171 and P0174 codes are the result of faulty O2 sensors. Test For Exhaust Leaks The manages both pressure and vacuum cycles the engine runs. If you do not have a code scanner to clear the codes, disconnect the battery fro ~ 10 min, reconnect battery, start let idle to warm up, and do 2 drive cycles. You can also remove the hoses and flush the core with a water hose splice from Home Depot and a water hose. Tech notes The codes is usually set when there is an intake leak after the air flow meter, before replacing any parts check for loose or broken hoses and intake gasket leak.
Basically this means that an oxygen sensor in bank 1 detected a lean condition too much oxygen in the exhaust. Typically the code will be triggered by a lean condition in the engine. My undestanding was not unklie yours, I thought it had all the codes on it and the light would come on when it reconised the code was interupted? I find it's best to take it off and spray it with electronics cleaner or brake cleaner. The deal fix for this problem requires removal of the dash and plenum box, disconnecting the refrigerant system and draining the radiator. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle.