Traditional gasoline car fault

1999 Chevy Silverado P0327, P0171, and P0174 Diagnosis: Lean Mix Issues and Sensor Troubleshooting

I own a 1999 Chevrolet Silverado 1500 4.3L V6 with an automatic transmission. The vehicle is exhibiting persistent engine misfires and lean air-fuel mixture codes—P0327 (Knock S...

1999 Chevy Silverado | P0171

98 Ford Tarus 3.0L Engine Faults: P0174, P1131, P1151 - Diagnosis and Solutions

I've been troubleshooting a persistent engine issue on my 1998 Ford Tarus 3.0L engine. After installing a code reader, I'm now seeing fault codes P0174, P1131, and P1151. The sy...

98 Tarus 3.0 eng | P0174

1999 Ford F-150 V6 4.2L: Fixing OBD-II Codes 0171, 0174, 0401, and 1408 with Shaking at Idle

My son owns a 1999 Ford F-150 V6 4.2L 2WD with 112,000 miles. Recently, the truck began shaking severely at idle and low speeds—similar to being about to stall—but does not actu...

1999 Ford F-150 | P0171

2001 Nissan Pathfinder P0171 and P0174: MAF Sensor Replacement Needed?

I recently encountered the same OBD2 fault codes P0171 and P0174 on my 2001 Nissan Pathfinder. Last year, I followed advice from several forum posts that pointed to a dirty Mass...

2001 Pathfinder | P0171

1999 Chevy Silverado P0327, P0171, P0174 Fault Diagnosis: Catalytic Converter or Other Causes?

My 1999 Chevrolet Silverado is showing multiple OBD-II diagnostic codes: P0327 (random misfire detected), P0171 (too lean mixture bank 1), and P0174 (too lean mixture bank 2). I...

1999 Chevy Silverado | P0171

1996 Ford Contour V6 2.5L P0174 Code: System Too Lean Bank 2 - Diagnosis and Fix

I own a 1996 Ford Contour with a 2.5L V6 engine. After the check engine light came on, I received fault codes P0174 and P0171 indicating a lean condition in Bank 2. I performed ...

1996 Ford Contour | P0174

1996 Ford Windstar P0171 & P0174 Trouble Codes: Causes After Intake Manifold Gasket Replacement

I own a 1996 Ford Windstar with a 3.8L engine. My OBD2 scanner is displaying trouble codes P0171 (System Too Lean Bank 1) and P0176 (System Too Lean Bank 2). These codes appeare...

1996 FORD WINDSTAR | P0171

1999 Chevy Silverado 4.3L: Resolving P0327, P0171, and P0174 Codes After Multiple Repairs

I'm back with a persistent issue on my 1999 Chevrolet Silverado 1500 4.3L V6 with automatic transmission. Since August 2008, I've replaced the MAF sensor, air filter, knock sens...

1999 Chevy Silverado | P0171

2002 Chevy Silverado 5.3L P0106, P0107, P0300, P0171/P0174 - Post-Intake Gasket Replacement Still Shows Codes

Hello everyone, I've been experiencing rough idling in my 2002 Chevrolet Silverado (5.3L V8) specifically during cold mornings, but the engine runs smoothly once it warms up an...

02 Chevy Silverado | P0106

2004 Ford F150 P0171, P0174, P0191, P0301 Fault Codes - Sputtering and Emission Light On

I recently drove my 2004 Ford F150 FX4 from San Angelo, Texas to Fort Hood, Texas — a 158-mile journey. During the drive, the truck began to sputter severely, as if it were abou...

2004 F150 | P0171

1996 Chevy Suburban P0174 Code: Rough Idle and Starting Issues in Cold Weather

Hi everyone, I'm a new member and I'm currently troubleshooting my 1996 Chevrolet Suburban C2500 7.4L (454 engine). The vehicle is throwing a P0174 diagnostic trouble code, indi...

1996 Chevy Suburban | P0174

97 Ford Expedition codes P0171 and P0174 not a PCV leak

I have 97 Expedition 5.4L 4x4 154k miles with 2 codes: P0171 and P0174. has new vacuum hose from intake to PCV, not leaking there. I don't hear any hissing fuel pressure is 30 l...

97 Ford Expedition | P0171

1997 Ford Expedition P0171 and P0174 Diagnostic: Misfire in Cylinder 4 and Fuel System Issues

I have a 1997 Ford Expedition with a 5.4L engine. I recently replaced the spark plugs due to a misfire in cylinder #4. After replacing the fuel filter and clearing the codes usi...

1997 ford expedition | P0171

2000 Mazda MPV P0174 Code: System Too Lean Bank 2 - Diagnosis and Solutions

I'm experiencing a P0174 diagnostic trouble code on my 2000 Mazda MPV, indicating that Bank 2 is running too lean. The vehicle has four oxygen (O2) sensors as shown in Mitchell'...

2000 Mazda MPV | P0174

2001 Ford Windstar P0171 and P0174 OBD2 Fault Codes: Causes and Fixes

Hello everyone, I recently checked my engine fault codes and found P0171 and P0174. Can anyone help me understand what these codes mean and how to resolve them? Additionally, I...

2001 ford windstar | P0171

2001 Ford F150 V6 P0171, P0174, P0303 Fault Diagnosis: Vacuum Leak and Coil Pack Issues

My 2001 Ford F150 V6 is experiencing severe engine shuddering at lower RPMs, especially in gears 3 and 4 with a manual transmission. The vehicle has triggered OBD-II diagnostic ...

2001 F150 V6 | P0171