Question about 1997 Ford F150 Regular Cab

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Ford f150 2001 code p0172 and code p0174 - 1997 Ford F150 Regular Cab

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CODE PO172 - SYSTEM ADAPTIVE FUEL TOO RICH BANK 1 POSSIBLE CAUSE EVAP VAPOR RECOVERY SYSTEM FAILURE MAY BE PULLING VACUUM.FUEL PRESSURE REGULATOR FAULTY.HO2S ELEMENT CONTAMINATED.LEAKING FUEL INJECTORS. CODE PO174 - FUEL SYSTEM TOO LEAN CYLINDER BANK 2. POSSIBLE CAUSE EXHAUST LEAKS BEFORE OR NEAR THE HO2S,WEAK FUEL PUMP.RESTRICTED FUEL INJECTORS, LEAKING EGR VALVE GASKET OR DIAPHRAGM.MAF SENSOR DIRTY CAUSING PCM TO UNDERESTIMATE AIRFLOW.

Posted on Aug 25, 2010

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Posted on Jan 02, 2017

bschilz
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SOURCE: P0172 AND P0174

Basically this means that an oxygen sensors
in bank 1 and bank 2 detected a rich condition (too little oxygen in the exhaust).

A code P0172 and P0174 may mean that one or more of the following has happened:
1. The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters can cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
2. There could be a vacuum leak.
3. There could be a fuel pressure or delivery problem

Possible solutions include:
Inspect all vacuum and PCV hoses, replace if necessary
Clean the MAF sensor. Consult your service manual for its location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling
Inspect fuel lines for cracks, leaks, or pinches
Check the fuel pressure at the fuel rail
Check the fuel injectors, they may be dirty. Use fuel injector cleaner or get them professionally cleaned/replaced.
Check for an exhaust leak before the first oxygen sensor (this is unlikely to cause the problem, but it is possible)

Posted on Jan 04, 2010

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What does error code p0172 and p0174?


P0172 - Fuel Injection System Too Rich Bank 1 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connec
Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem.



P0174 - Fuel Injection System Too Lean Bank 2 Symptoms - Engine Light ON (or Service Engine Soon Warning Light)
- Excessive Fuel Consumption
Possible causes - Intake air leaks
- Front Heated oxygen sensor may be faulty
- Injectors may be faulty
- Exhaust gas leaks
- Incorrect fuel pressure
- Lack of fuel
- Mass air flow sensor may be faulty
- Incorrect PCV hose connection
Possible solution Dirty air filter of faulty air flow sensor are common causes of the problem. Bottom line possible defective Mass airflow sensor and or O2 sensor in cylinder bank number two.

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I got codes, p0172 and p0174 (mustang gt 4.6L)


When these codes are tried together it usually means O2 sensors are going bad. I suggest you get a real scanner on it before you spend $$$$$

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