Traditional gasoline car fault

P0171 and P0174 Fault Codes in Ford Vehicles: Diagnosing Vacuum Leaks and Sensor Issues

If your Ford vehicle is displaying diagnostic trouble codes P0171 and P0174 but the engine runs smoothly, it's unlikely that any individual sensor is faulty. The oxygen sensors ...

Fords | P0171

2003 Ford F150 4.6L Engine P0172 & P0174 Codes: Diagnosis and Repair Questions After Multiple Dealer Visits

My 2003 Ford F15-0 with 89,000 miles has been experiencing severe performance issues. The engine idles smoothly in park but stalls or runs poorly when shifted into gear—typicall...

2003 F150 | P0172

1997 Chevrolet 1500 4.3L Engine P0306, P0131, P0174 - Cold Starts Fine, Warm-Up Bogs at 35mph with Loss of Torque

I have a 1997 Chevrolet 1500 with a 4.3L V6 engine. The vehicle runs perfectly when cold, but as it warms up, it begins to bog down and will only reach about 35 mph at around 15...

97' chevy 1500 4.3 | P0131

2001 Ford Escape V6 3.0L P0171 and P0174 Code: Rough Idle and Stalling Diagnosis

I own a 2001 Ford Escape with a 3.0-liter V6 engine that is experiencing rough idling and occasional stalling. The vehicle seems to be underperforming despite having already cle...

Ford Escape | P0171

PO171/PO174 Fault Code Fix for 2001 Ford F150 4.2L Engine - Intake Manifold Bolt Grommets Required

After experiencing the PO171 and PO174 fault codes on my 2001 Ford F15-0 4.2L engine, I replaced the intake manifold O-rings on the lower plastic section. While shopping for par...

4.2 01 F150 | P0171

1997 Ford F-150 P0171 & P0174 Code Diagnosis: Causes and Affordable Fixes for DIY Owners

I recently encountered a recurring issue with my 1997 Ford F-150 (4.2L V6, approximately 141,000 miles) that returned two diagnostic trouble codes: P0171 and P0174. The truck st...

1997 Ford f-150 | P0171

P0171 and P0174 Diagnosis for 1999 Ford F-150: Fixing Lean Mixtures in Bank 1 and Bank 2

I own a 1999 Ford F-150 with persistent P0171 and P0174 diagnostic trouble codes, indicating the engine is running lean in both fuel banks. I've already replaced key components ...

99 Ford F150 | P0171

PO171/PO174 Fault Diagnosis: Intake Gasket Leak Location & Freeze Frame Explanation for 2001 Ford F150 4.2L

Which intake gaskets are most likely to cause PO171 and PO174 codes in a 2001 Ford F15-0 4.2L engine? Specifically, is it the head-to-aluminum intake gasket or the aluminum inta...

4.2 01 F150 | P0171

2002 Ford Windstar P0171-P0174: Causes and Fixes After Air Filter Replacement

I recently replaced the air filter on my 2002 Ford Windstar in November. About 2–3 weeks later, the check engine light came on with codes P0171 and P0174. I inspected the air fi...

Ford Windstar | P0171

PO171 and PO174 Diagnosis for 1999 Ford F150: Lean Mixtures in Both Banks

The vehicle is displaying diagnostic trouble codes PO171 and PO174, indicating a lean air-fuel mixture in both engine banks. I took it to a repair shop where they replaced the f...

1999 Ford F150 | P0171

2000 GMC Yukon 5.3L Engine Misfires and Fuel Issues: P0171, P0174, P0300, P0151 Diagnosis

I recently started having serious engine problems with my 2000 GMC Yukon equipped with a 5.3L V8 engine. When I turned the key on this morning, the truck would barely stay runni...

2000 GMC Yukon | P0151

P0171 & P0174 Fault in 2005 Dodge Stratus Running E85 Fuel: Causes, Fixes, and Diagnostics

I own a 2005 Dodge Stratus with 71,000 miles. The vehicle is equipped with a 2.7L flexfuel engine designed specifically for E85 operation. I purchased it about two months ago an...

Dodge Stratus | P0171

2001 Ford Windstar P0401, P0171, P0174, P1406 - Diagnosis and Fixes

I own a 2001 Ford Windstar and am currently troubleshooting several diagnostic trouble codes: P0401 (Exhaust Pressure Regulator Malfunction), P0171 (System Too Lean Bank 1), P01...

2001 ford windstar | P0171

1997 Ford f-150 codes P0171 & P0174

Lets see if I can help. My truck gave me the same code's p0171, 1st bank lean. Then a p0174, second bank lean. At the rear of the engine between the fire wall and the plinum the...

1997 Ford f-150 | P0171

2002 Ford Windstar P0171-P0174: Vacuum Leak Diagnosis and Fix After Air Filter Replacement

I replaced the air filter about a month ago. A few days later, my check engine light came on with fault codes P0171 and P0174. Upon inspecting the air filter housing, I found th...

2002 Ford Windstar | P0171

P0300, P0304, P0306 and P0171/P0174 Fault Diagnosis - 1999 Ford F-150 4.2L Engine

I own a 1999 Ford F-150 with a 4.2L V8 engine and am currently experiencing multiple OBD-II diagnostic trouble codes: P0171 (System Too Lean Bank 1) and P0174 (System Too Lean B...

1999 ford f150 | P0174

P1131, P1151, P0174, P0304, P0306 - Diagnosis and Fixes for 2000 Ford Expedition with 145K Miles

I'm experiencing multiple OBD-II fault codes on my 2000 Ford Expedition: P1131, P1151, P0174, P0304, and P0306. The vehicle has accumulated 145,000 miles and is running roughly,...

2000 Ford Expedition | P0174