Traditional gasoline car fault

2005 Chevy Tahoe P0300 P0171 P0131

I have a 2005 chevy tahoe that started showing these three codes. The check engine light comes on after the tahoe has warmed up and I have shut the engine off, and started it b...

2005 Chevy Tahoe | P0131

2004 Monte Carlo 3.4L P0452 and P0171: Fuel Tank Pressure and Lean Running Issues After Fuel Pump Replacement

New member here — hoping I'm in the right section. I own a 2004 Monte Carlo with a 3.4L engine, currently at 76,000 miles. One week ago, I had my fuel pump replaced. Last Thurs...

2004 Monte Carlo | P0171

2004 Ford F-150 No Start with P0171, P0174, P0356, P2195, P2197 - Fuel or Ignition Issue?

I have a 2004 Ford F-150 'New Edge' 5.4L 3-valve V8, automatic transmission, 4x4 SuperCrew with 112,000 miles. The truck has original spark plugs and was recently serviced with ...

04 F-150 | P0171

1998 Lexus ES300 P0171 Code: Diagnosis and Solutions After Multiple Fixes

Hello everyone, this is my first post on the forum — I'm a member of Club Lexus.com and Solaraguy.com. I’m currently troubleshooting a persistent issue with my 1998 Lexus ES300,...

1998 Lexus ES300 | P0171

2001 Lexus RX300 P0171 Lean Bank 1: Diagnosis and Fixes for Poor Fuel Economy & Rough Idle

I own a 2001 Lexus RX300 with 150,000 miles. The check engine light and VSC warning light have been on for an extended period. The vehicle has generally run well until recently....

2001 Lexus RX300 | P0171

2002 Ford F-150 P0171 and P0174 Lean Mixtures: Diagnosis and Fixes for Both Banks

Yesterday my 2002 Ford F-150 was throwing trouble codes P0171 (lean mixture in bank 1) and P0174 (lean mixture in bank 2), followed by a persistent misfire in cylinder 7 (code P...

2002 f-150 | P0171

Dodge Ram 1500 1996 P0171 Fault Code: Lean Mix Issue & Diagnosis Tips

I own a 1996 Dodge Ram 1500 with a 5.9L V8 engine, 4-wheel drive, and over 150,000 miles. The check engine light is on, and I've received diagnostic code P0171, which indicates ...

1996 Dodge Ram 1500 | P0171

2002 Ford Ranger Hard Starting with P0171 Code - Fuel Pressure & Engine Warm/Cold Issues

Hello everyone, I'm experiencing persistent hard starting issues with my 2002 Ford Ranger 2.3L (77,000 miles). The truck requires multiple cranks—often 2–3 attempts—to start, w...

2002 Ranger | P0171

2000 Mercury Sable P0171 and P0174: Fuel Too Lean in Both Banks - Diagnosis and Repair Guide

I own a 2000 Mercury Sable with a 3.0L OHC engine. After scanning the vehicle, I received diagnostic trouble codes P0171 and P0176, indicating 'Fuel Too Lean Bank 1' and 'Fuel T...

2000 Sable | P0171

2003 GMC Yukon 5.3L Z Flex Fuel: P0171, P0174, P0420 - O2 Sensors or Catalytic Converter Issue?

I own a 2003 GMC Yukon 2WD with a 5.3L Z engine (flex fuel). The vehicle is currently displaying three diagnostic trouble codes: P0171 and P0174 (System Too Lean - Bank 1 and Ba...

2003 GMC Yukon | P0171

2002 Cadillac DeVille P0171 and P0174 OBD2 Codes - Fuel Quality & Coolant Warning Explanation

I'm currently experiencing only two diagnostic trouble codes: P0171 and P0174. I've already inspected all fuel lines and hoses, and everything appears to be in good condition. A...

02 Cadillac DeVille | P0171

1998 Ford E150 6-Cylinder Automatic: Resolved P0174, P0171, P0301, and P01131 Codes After Spark Plug Replacement

My check engine light is on. I recently replaced the spark plugs, which helped resolve some of the codes, but I still have P0174, P0171, P0301, and P01131. A sales associate at ...

1998 E150 6cyl automatic | P0171

PO171 Fault on Hyundai Santa Fe 2.4L - OBD-II Code Diagnosis and Repair

Hi everyone, I'm experiencing OBD-II fault code PO171 on my Hyundai Santa Fe 2.4L engine. After replacing the cracked exhaust manifold and resetting the system, the MFL (Malfunc...

HYUNDAI Santa FE | P0171

P0171 Diagnostic: System Too Lean Bank 1 on 2001 Pontiac Montana

The vehicle is displaying fault code P0171, indicating a 'System Too Lean Bank 1' condition. This typically points to an air-fuel mixture that is too lean in the first engine ba...

2001 Pontiac Montana | P0171

1990s Chevrolet Trans Am P0171 and P0174 OBD2 Codes: Causes and Fixes After Fuel Fill-Up

My check engine light came on with OBD2 diagnostic codes P0171 and P0174. This occurred immediately after I refilled the fuel tank. I cleared the codes, and they remained off fo...

01 Trans Am | P0171

P0171 and P0174 Codes on 1999 Ford F150: Causes, Fixes, and Diagnostics for Lean Fuel Conditions

I'm a DIY enthusiast with solid experience working on vehicles from 1985 to the present. I'm currently troubleshooting a 1999 Ford F150 (2WD, 5.4L V8) that has triggered OBD II ...

1999 Ford F150 | P0171

PO171 and PO174 Diagnostic Guide for 2007 Chevrolet Silverado with Stock Engine

Hi everyone, I'm new to this forum and wanted to ask for some help regarding a check engine light issue on my 2007 WT-style Chevrolet Silverado. The truck has approximately 33,0...

2007 Silverado | P0171

2001 Pontiac Montana Fault Codes P0135 and P0171: Causes and Diagnosis

My 2001 Pontiac Montana originally displayed code P0135. After replacing both oxygen (O2) sensors, the vehicle now shows both P0135 and P0171. I'm concerned because P0171 should...

2001 Pontiac Montana | P0135