Traditional gasoline car fault

1999 Ford Ranger P0171, P0174 and P0442 Codes: Intake Vacuum Leak or Evaporative System Issue?

Can a P0442 code cause P0171 and P0174? I'm assuming that with both lean bank codes present, it indicates an intake system issue. However, I want to confirm whether the P0442 (e...

99 ford ranger | P0171

2006 Ford Taurus P0174, P0420, P0171, P0316 Diagnosis and Repair Guide

My girlfriend's daughter drives a 2006 Ford Taurus with 86,000 miles. The vehicle is currently displaying active OBD2 diagnostic codes: P0174 (Rich mixture on bank 2), P0420 (Ca...

2006 Ford Taurus | P0171

2006 Ford F150 4.2L with 253k Miles: Persistent PO171 and P0174 Codes After Multiple Repairs

Hello everyone, I'm currently troubleshooting a recurring issue on my 2006 Ford F15-0 with a 4.2L V8 engine and 253,000 miles. Despite replacing the ignition coil pack for the s...

F150 | P0171

2009 Hyundai Santa Fe P0174 & P2189 Error Codes: Causes, Fixes, and What to Check Before Replacing O2 Sensors

Hi everyone! I'm new to OBD-II codes and my first time posting here. Thank you in advance for your guidance. I own a 2009 Hyundai Santa Fe with a 3.3L engine, currently at 139,...

Hyundai Santa Fe | P0174

P0171 & P0174 OBD2 Codes in 2014 Mustang V6: Cold Air Kit Cause or System Fault?

I've owned my 2014 Mustang V6 for 9 months and have driven approximately 4,000 miles. I recently installed a cold air intake kit (which the manufacturer stated did not require a...

14 Mustang V6 | P0171

Hyundai Veracruz 0171 and 0174 Error Codes: Causes and Fixes for Misfire and Poor Engine Performance

My wife recently filled up the 2008 Hyundai Veracruz (173,000 miles) with gas, after which the vehicle began exhibiting rough idling, misfiring, and sudden power loss — commonly...

Hyundai Veracruz | P0171

2003 Ford F-150 P0174 Code: Lean Condition on Bank 2 - Diagnosis and Solutions

I own a 2003 Ford F-150 with a supercharged 5.4L V8 engine, currently at 114,000 miles. The vehicle is showing a P0174 diagnostic trouble code, indicating a lean condition on ba...

03 F-150 | P0174

13 DTC codes Mitsubishi Montero 2002 which one is more urgent and how to repair

Hi, My name is Jonhny Homelus, glad to connect with you in this amazing community ! After doing a scan with a Innova 3160 b on my Mitsubishi Montero 2002 (Automatic, Engine: V6,...

Mitsubishi Montero | P0171

P0174 Trouble Code Explanation and Fix for 2003 Lexus ES300

What does trouble code P0174 mean for a 2003 Lexus ES300, and how can it be resolved?\n\nP0174 indicates a lean air-fuel mixture in Bank 2 of the engine. This code typically poi...

2003 Lexus ES300 | P0174

2015 Hyundai Santa Fe P0171, P0174, and P2096 Codes: Diagnosis After O2 Sensor Replacement

Hello, I'm experiencing persistent engine trouble codes P0171 (System Too Lean Bank 1), P0174 (System Too Lean Bank 2), and P2096 (Post-Catalyst Fuel Trim System Too Lean Bank 1...

2015 Hyundai Santa Fe | P0171

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

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

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

2001 Saturn L300 V6 with P0159, P0174, P0453: Rough Idle, Poor MPG, Black Smoke - What to Do Next?

2001 Saturn L300 V6, 110,000 miles. Experiencing rough idle, poor fuel economy, and black smoke exiting the tailpipe. Recently replaced spark plugs, ignition coils, and EGR valv...

2001 Saturn L300 V6 | P0159

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

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

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

2002 Infiniti I35 P0174 Fault: Variable Idle with Vacuum Leak Suspected

I consistently receive fault code P0174 (Bank 2) when scanning my 2002 Infiniti I35. While I have not identified a visible vacuum leak, the symptom is intermittent rough idle—so...

2002 Infiniti I35 | P0174