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2002 Chevy Silverado P0171 and P0174 OBD2 Code: How to Locate and Test Oxygen Sensors for Corrosion and Connection Issues
I need help locating the oxygen (O2) sensors on my 2002 Chevrolet Silverado to check for corrosion or loose connections. I'm currently seeing both P0171 and P0174 diagnostic tro...
2002 Chevy Silverado | P01712005 Mitsubishi Endeavor LS P0431, P0174, P0421, P0171, P0304, P0431
I have a 2005 Mitsubishi endeavor with the following codes: P0431, P0174, P0421, P0171, P0304, and P0431 and I haven't the faintest idea what any of them mean. I have searched t...
2005 Mitsubishi Endeavor LS | P0171P0171 Diagnostic Guide for 2005 Dodge Grand Caravan SXT
I'm experiencing a P0171 trouble code on my 2005 Dodge Grand Caravan SXT, and I'm looking for clear steps to diagnose the root cause. What are the most common issues associated ...
2005 Dodge Grand Caravan SXT | P01711998 Chevy Express 4.3 Vortec P0171 and P0174 OBD2 Code - Check Engine Light Returning After Full Component Replacement
My 1998 Chevrolet Express 4.3L Vortec engine is showing persistent P0171 (System Too Lean) and P0174 (System Too Rich) OBD2 codes. The check engine light comes back on repeatedl...
98 Chevy Express 4.3 Vortec | P01712000 Ford Focus P0303 P0304 P0171 P0172 P1132 - Engine Stalls, Loses Power on Warm Days
2000 Ford Focus 2.0L MFI DOHC 4-cylinder, 184,000 miles My 2000 Ford Focus is experiencing intermittent power loss and stalling, especially on warm days (air temperature above ...
2000 Ford Focus | P01712004 Nissan Xterra P0171 - System Running Too Lean Bank 1: Diagnosis and Fixes
My 2004 Nissan Xterra is exhibiting difficulty accelerating and failing to shift into higher gears. While I suspect it's not a transmission issue, I'd like to know what diagnost...
2004 Nissan Xterra | P01712001 Ford Escape XLT P0171 and P0174 Codes: Idle Issues After Purchase
I recently purchased a 2001 Ford Escape XLT 'as is' last night. When I handed over the payment, there was no check engine light on. However, exactly two hours later, the check e...
2001 Ford Escape XLT | P01712000 Chevrolet Malibu P0171 Code: Diagnosis and Solutions for Lean Mix Ratio
I've already replaced the fuel filter and both O2 sensors (Bank 1 and Bank 2), but the P0171 lean code persists. Below is my freeze frame data: - Fuel System 1: CL (Closed Loop...
2000 Malibu | P0171Ford Focus TD CI 1.8L Fault Codes U01, U73, U121, U131, U140, U155 - What Do They Mean and Is It a Major Issue?
I'm looking for help with my Ford Focus TD CI 1.8L vehicle. I've recently picked up several fault codes: U01, U73, U121, U131, U140, and U155. Can anyone explain what these code...
Ford Focus | P00112007 Honda Civic Hybrid P0171 - Engine Management Light On, Fuel System Lean
My 2007 Honda Civic Hybrid has triggered the engine management light. The onboard diagnostic system has detected fault code P0171, indicating a lean fuel condition in the fuel s...
Honda Civic hybrid | P01712006 Sedona LX 3.8L - Limp Mode & Blinking CEL: OBD2 Codes 0171, 0174, 0300, 0331 Explained
I recently purchased a 2006 Toyota Sedona LX (3.8L V6) on February 13, 2015, in a cash deal from a dealer for my wife. After driving approximately 100-150 miles with no issues, ...
Sedona LX | P01712005 Ford Freestar P0171 P2195 P2097: How to Diagnose and Fix Vacuum Leak Issues
I've checked the OBD-II codes for both fuel banks. I've already replaced the MAF sensor, PCV valve, and associated hose, but the codes P0171, P2195, and P2197 persist. What is t...
2005 Ford Freestar | P0171Chevy Silverado 5.0L Engine O2 Sensor Trim N/A Issue - B1-S3 Not Ready for Emissions Test
After storing my 1998 Chevrolet Silverado with a 5.0L engine without a battery for one year, I rebuilt the transmission and successfully restarted the vehicle. All systems initi...
Chevy Silverado | P01712006 Audi A4 S-Line 2.0T Running Lean Bank 1 - Fault Code Diagnosis and Repair Help
I own a 2006 Audi A4 S-Line with a 2.0L TDI engine. About a month after purchasing the car, the engine light came on and displayed a 'Running Lean Bank 1' fault code. I took it ...
2006 Audi A4 | P01712011 Ford Fusion SE OBD2 Codes P0171 and P2195 - How to Fix for Emissions Inspection
I'm having trouble getting my 2011 Ford Fusion SE to pass emissions inspection. The vehicle is showing persistent OBD2 diagnostic codes P0171 (Rich Fuel Mix - Bank 1) and P2195 ...
2011 Ford Fusion SE | P01712004 Ford Ranger 3.0L Engine O2 Sensors Stuck in Rich Mode Diagnosis and Fixes
I'm experiencing an issue with my 2004 Ford Ranger 3.0L engine where the oxygen (O2) sensors are consistently showing a 'stuck rich' condition, resulting in poor fuel efficiency...
2004 ranger3.0 | P01712003 Nissan Pathfinder P0171 Code: System Too Lean (Bank 1) - Diagnosis and Fixes
Hi everyone, I'm experiencing a P0171 diagnostic trouble code on my 2003 Nissan Pathfinder with an automatic transmission. The code indicates 'System Too Lean (Bank 1)', meaning...
2003 Nissan Pathfinder | P01712000 Hyundai Sonata P0171 Too Lean - Diagnosis and Fix Guide
I've been struggling with the P0171 'Too Lean' diagnostic code for the past month. I'm due to complete my emissions test in just a few days, but despite cleaning the MAF sensor,...
2000 Hyundai Sonata | P01712011 Chevy Malibu 2.4L P0171 Code: System Too Lean - Diagnosis and Solutions
I'm experiencing a persistent P0171 'System Too Lean' fault code on my 2011 Chevrolet Malibu with the 2.4L engine. Despite cleaning the Mass Air Flow (MAF) sensor, checking for ...
2011 Chevy Malibu | P0171