Traditional gasoline car fault

2002 Ford Expedition 5.4L Engine Running Poorly with P0171 and P0174 OBD2 Codes

I'm new to forums and have no other options—my check engine light came on last year, triggering P0171 and P0174 diagnostic codes. My 2002 Ford Expedition with a 5.4L V8 engine r...

02 Expedition 5.4 | P0171

2007 VW EOS Fault Codes P0171, P0300-P0304, and P0455: Causes and Required Repairs

I own a 2007 Volkswagen EOS and am experiencing the following diagnostic trouble codes: P0171, P0300-P0304, and P0455. Can someone please clarify exactly which parts I need to r...

2007 VW EOS | P0171

94 Mercury Cougar with P0102, P0153, P0402, P1132, P1152, P0302, P0306, P-171, and P0175 - Diagnosis and Fixes

I'm experiencing multiple OBD-II diagnostic codes on my 1994 Mercury Cougar: P0102 (Manifold Absolute Pressure Sensor Range/Performance), P0153 (Oxygen Sensor Bank 1 Sensor 2 Ma...

94 Mercury Cougar | P0102

1999 Ford V10 Triton RV with Persistent P0171, P0174 and New P0401 Code - Should I Be Concerned?

Hi everyone, I own a recreational vehicle (RV) powered by a 1999 Ford V10 Triton engine. For the past three years, I've been seeing diagnostic trouble codes P0171 and P0176 rela...

1999 Ford V10 RV | P0171

2005 Grand Cherokee O2 Sensor Voltage Circuit Low: Fix After Replacing All Sensors

I recently replaced all four oxygen (O2) sensors on my 2005 Grand Cherokee Limited 4.7L V6, 4-wheel drive WK series with brand-new Denso sensors. Initially, I only had a P0031 c...

2005 Grand Cherokee | P0171

2004 Tahoe P0171 P0174 O2 Sensor & MAF Issues at 334,000 Miles

My 2004 Chevrolet Tahoe is showing trouble codes P0171 (Rich Fuel Mix - Bank 1) and P0174 (Rich Fuel Mix - Bank 2), along with intermittent P0300 (Random Misfire). I also experi...

04 tahoe | P0171

2004 Ford F150 3V 5.4L Engine Fault Codes P0022, P0351, P0171 - Diagnosis and Solutions

I own a 2004 Ford F150 3V 5.4L engine vehicle that has recently triggered the following diagnostic trouble codes: P0022, P0351, and P0171. I currently use a Bluetooth OBD2 scann...

2004 F150 3V 5.4L | P0022

2005 Chevy Avalanche Check Engine Light Flashes Intermittently - No Diagnostic Codes

I own a 2005 Chevrolet Avalanche and am experiencing an intermittent Check Engine Light issue. When I turn the key on without starting the vehicle after it has been idle for som...

2005 Chevy Avalanche | P0171

2003 VW Jetta P0420, P0442, P2181, P0171 - System Too Lean Bank 1: What Components to Replace?

I own a 2003 Volkswagen Jetta with 249,000 miles. The car runs smoothly overall, but I've noticed the coolant reservoir has been low twice in the past two months, triggering the...

2003 VW Jetta | P0171

1997 Chevy C2500 7.4L Engine Fault Codes P0102, P0157, P0171, P0174 - Rough Start, Hesitation, Fuel Smell

I own a 1997 Chevrolet C2500 7.4L V8 standard cab truck (VIN J, automatic transmission). Recently preparing for a vehicle inspection, I replaced spark plugs, ignition wires, and...

97 Chevy C2500 | P0102

Ford F-250 460 P0171 and P0174 OBD2 Codes - How to Fix Emissions and Engine Light Issues

I'm experiencing P0171 and P0174 diagnostic trouble codes on my Ford F-250 460. The check engine light and emissions warning are both on. I've already replaced the factory-manuf...

f-250 460 | P0171

2000 Ford F150 5.4L 2V Triton OBD2 Codes P0156 and P0171: Diagnosis and Fixes

For the past week, I've been experiencing OBD2 trouble codes P0156 and P0171 (and occasionally P0174) on my 2000 Ford F150 with a 5.4L 2V Triton engine. I've already replaced bo...

2000 F150 5.4L 2V Triton | P0156

2015 Chevy Express Check Engine Light with P0171, P0174, and P0113 Codes After E85 Usage

A 2015 Chevrolet Express owner reports the check engine light is on due to persistent trouble codes P0171 (System Too Lean Bank 1), P0174 (System Too Lean Bank 2), and P0113 (En...

2015 Chevy Express | P0113

P0171 Fault on 2007 Chevrolet Trailblazer 4.2L Engine: Diagnosis and Solutions

I own a 2007 Chevrolet Trailblazer with a 4.2L engine and over 200,000 miles. I've recently received the P0171 diagnostic trouble code (DTC), indicating a lean air-fuel mixture ...

Trailblazer | P0171

1997 Nissan Maxima Check Engine Light On: P1105, P0305, P0174, P0171 Fault Codes at 200,000+ Miles

My 1997 Nissan Maxima is showing multiple check engine light fault codes: P1105, P030-5, P0174, and P0171. The vehicle has reached approximately 200,000 miles and the Check Engi...

1997 Nissan Maxima | P0171

2000 Trans Am WS6 LS1 P0171 and P0174 Codes After EGR and Air Pump Removal with SLP Headers

I recently installed SLP headers with high-flow catalytic converters and an ORY pipe on my 2000 Trans Am WS6 with the LS1 engine. I also performed an EGR delete and air pump rem...

2000 Trans Am | P0171

2003 Saturn Vue P0507, P0171, P0174, P0442 Codes: How to Diagnose Exhaust Leak or Sensor Issues Without Replacing Parts

I own a 2003 Saturn Vue that has been displaying engine trouble codes P0507, P0171, P0176, and P0442. These codes are commonly associated with exhaust leaks or faulty sensors, b...

2003 Saturn VUE | P0171

P0171 and P0108 Fault Codes on 1998 Dodge Voyager 3.0L Engine - Engine Unstable, Vacuum Leak Diagnosis

I'm experiencing engine instability and failure to run smoothly in my 1998 Dodge Voyager with a 3.0L engine. After starting the vehicle, the engine runs roughly and eventually s...

Voyager 1998 | P0108

2000 Chevy Blazer LS 4-Door with Hatch: Fixing P0171 and P0174 OBD2 Codes for Smog Pass

My 2000 Chevrolet Blazer LS 4-door with hatch failed smog inspection due to OBD2 diagnostic codes P0171 and P0174. These codes indicate a lean air-fuel mixture in the engine, wh...

2000 Chevy Blazer LS | P0171

P0171 Lean Bank 1 Diagnosis on 2000 GM 7.4L Vortec Engine

I own an RV equipped with a 2000 GMC 7.4L Vortec engine (50,000 miles) that intermittently triggers the P0171 fault code indicating a lean condition in Bank 1. Notably, I am no...

2000 7.4L Vortec | P0171