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What would you do to fix obd2 codes p0171 and p0174 on a 2003 ford explorer?
Wiki User
∙ 14y ago
here are the meanings of the following codes, po171-system too lean(bank 1) po174-system too lean (bank 2). ok the fix could be the following, maf sensor may need to be cleaned. you can go to any auto parts store and buy maf cleaner,but follow instructions on can. could be air leak in air intake hose to air cleaner or an exhaust restriction. the codes are the same but for each bank. please let me know the outcome carl, when cleaning mass airflow sensor, do not touch any part of the inside of it or it will go bad and the sensors are not that cheap! so be carefull when taking off maff sensor to clean it.
Wiki User
∙ 14y ago
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How do you fix codes P0171 and P0174 in a 99 mercury sable LS with the check engine light on?
Bank 1 and bank 2 is running lean. I would suspect a vacuum leak. Check for cracked, disconnected or broken vacuum line(s). The fuel filter could also be plugged and restricting the flow of fuel.
What would you need to fix if you are receiving Trouble Codes P1507 P0171 and P0174 on a 2000 Ford Windstar 3.8 6 cylinder?
P0171 and P0174 (mixture too lean) is a known design fault. Excessive oil is pulled into the air intake plenum above the engine from the PCV tube, and the accumulated oil causes the seals on the isolator bolts holding the plenum onto the intake manifold to fail and leak. The solution is to replace the isolator bolts (current ones have improved seals), intake/plenum gaskets, and possibly some other vacuum hoses. See Ford TSB 03-16-1. It seems as though your Idle Air Controller isn't responding fast enough. If this isn't working correctly then it can cause the other two codes. See "Related Questions" below for more on the isolator bolts problems, and more importantly, the fix.
What would cause the code p0174 on a f150 4.2l v6?
vacuum leaks
How do you fix code p0171 in 2000 dodge in trepid?
P0171 = System too Lean (Bank 1). I would start by looking for a vacuum leak under the hood.
What would cause a Code p0171 on a Plymouth breeze?
p0171 fuel system lean bank 1 Causes include faulty oxygen sensor, weak fuel pump, plugged fuel filter, low fuel pressure, misfire, faulty map sensor, etc.
Why would a 1994 Ford Explorer Have a lose of power and slow to go?
I would check the fuel pressure and fuel filter. If you have a check engine light on, then you will need to have it checked for codes. That will mostly tell you what you need to know.
How do I correct the Check engine light on my 1998 Mazda 626 with the code of p0171?
Hi, I have the same problem with my 2000 Mazda 626. Still working on the problem, but I found this helpful:http://www.aa1car.com/library/problem_hesitation.htmDIAGNOSTIC TIPS FOR P0171 OR P0174 LEAN TROUBLE CODES A code P0171 or P0174 (or both) indicate the engine is running lean. This means there is too much air and/or not enough fuel. If you have a scan tool that can display Short Term Fuel Trim (STFT), you can confirm the engine is running lean by looking at the STFT at idle. If STFT is greater than about 10 to 12, the engine is running LEAN. Increase engine speed to 1600 to 2000 rpm and hold for a minute or so, then recheck the STFT value. If it has dropped 3 or 4 points or more, the lean problem is due to a vacuum leak (vacuum leaks have more of an impact on the idle fuel mixture than the cruise mixture). If the STFT valve is still the same, the problem is probably sensor-related (dirty or bad MAF sensor, or bad MAP sensor), or is due to low fuel pressure. The next steps would be to use the scan tool to look at the airflow and MAP sensor readings, and to check fuel pressure. A lean fuel condition can be caused by:* Low fuel pressure due to a weak pump or leaky fuel pressure regulator. (use a fuel pressure gauge to check fuel pressure at idle)* Dirty fuel injectors. (try cleaning the injectors)* Vacuum leaks at the intake manifold, vacuum hose connections or throttle body. (Check for vacuum leaks)* Leaky EGR valve. (Check the operation of the EGR valve)* Leaky PCV Valve or hose. (Check valve and hose connections)* Dirty or defective Mass Airflow Sensor (MAF). (Try cleaning the MAF sensor wires or filament with aerosol electronics cleaner. Do NOT use anything else to clean the sensor, and do not touch the sensor wires)* TIP: On many Fords, a P0171 and/or P0174 Lean Code may sometimes appear because of a bad Differential Pressure Sensor (DPFE). This sensor monitors EGR flow, and is located on the engine near the EGR valve. There are two hoses that connect the sensor to the tube that runs from the exhaust manifold to the EGR valve. The sensor misreads EGR flow and the computer increases EGR which has a leaning effect on the fuel mixture. The fix is to replace the DPFE sensor.* TIP: For information about other causes of P0171 and P0174 lean codes on Ford Windstar, Click HereREPAIRS Repairs will depend on what is causing the hesitation. If the cause is fuel related, it may require cleaning the fuel injectors or fixing a vacuum leak. If the cause is ignition related, it may require replacing the spark plugs and plug wires
Would Ford Explorer be in capitals in this sentence?
The " F " in Ford and the first " E " in Explorer would be capital letters
Where is the oxygen sensor located on a 2003 Pontiac Vibe?
There are two o2 sensors one before the converter and one after. There is a TSB (technical service bulletin) on the vibe o2 sensor. Depending on your milage your car may be covered. The heated sensor (sensor 1) is on the exhaust behind the engine. Trouble codes would be P0171 and P2195 for the TSB/recall.
Are there codes to get certain Pokemon?
No, if there was the codes would probably be action replay codes.
Need answers condering 1997 Ford Explorer EB?
PLease have the codes read with a scanner and that will point you in the correct direction. If i was to hazard a guess i would say the Vehicle Speed Sensor or circuit has gone bad.
What is wrong with a 01 sport trac that runs with no trouble but your check engine light is reading P1504-P1506-P1409-P0301-P0302-P0304-P0305 and P0171-P0174?
These are all powertrain codes (hence the P) and my guess is that maybe your idle air control valve is the problem. You say it is running fine but do you notice a drop in idle for a second when you come to a complete stop at say a red light? Also you are showing lean fuel ratios so have you noticed an increase in MPG or just lack of performance from the line? I would check the IACV and then if it looks good reset codes and give it a few days. If engine light comes on again then definitely have it looked at to prevent something costly down the road. That light merely means that the computer has sensed something out of range and as long as you are not blowing smoke or running rough then you have time to figure it out. Do your research though before spending a lot of money chasing parts that you may not need.
