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P0171 and P0174 OBD2 Codes on 2004 Jeep Grand Cherokee: Causes and Fixes
I recently performed a tune-up on my 2004 Jeep Grand Cherokee with a 4.7L V8 engine (approximately 56,000 miles). Before the service, the vehicle had a rough idle but no check e...
2004 Jeep Grand Cherokee | P0171P0171 OBD2 Code on 2000 Toyota Corolla: Diagnosis and Fixes
I've thoroughly checked for vacuum leaks and found none. I recently replaced the oxygen sensor with an aftermarket unit and installed a remanufactured mass airflow (MAF) sensor....
2000 Toyota Corolla | P0171P0171 and P0174 Fault Codes in Ford Vehicles: Diagnosing Vacuum Leaks and Sensor Issues
If your Ford vehicle is displaying diagnostic trouble codes P0171 and P0174 but the engine runs smoothly, it's unlikely that any individual sensor is faulty. The oxygen sensors ...
Fords | P0171P0171 OBD2 Fault Code in Volkswagen Jetta 1.8 Turbo: Diagnosis and Fixes
Hello, I'm experiencing the P0171 OBD2 diagnostic code on my Volkswagen Jetta 1.8 Turbo. The check engine light comes on intermittently and then turns off by itself. I'm looking...
Jetta 1.8 Turbo | P0171P0171 on a 1998 Dodge Stratus
What about fuel pressure,, ?? Also could be fuel pressure. Could be clugged injectors. They couldn´t be spreading the fuel OK. Take out the injectors and take them to a garage ...
1998 Dodge Stratus | P0171P0171 on a 1998 Dodge Stratus
Anyone dealt with this code after replacing the MAP sensor, EGR valve, O2 sensors, Fuel pump/regulator, plugs and wires? I get an inconsistent spark at idle and the plugs (main...
1998 Dodge Stratus | P01711997 Ford Contour P1131 and P0171 Lean Mix Error: Causes, Diagnostics & MAF Sensor Considerations
I own a 1997 Ford Contour with a 4-cylinder engine, currently at 107,000 miles. I'm experiencing several driving issues: the vehicle sometimes stalls after starting, has rough i...
97 Contour | P0171Ford Explorer 1997 P0171/P0174 Diagnosis: Intake Leak or Fuel Trim Issue? - Live Data & Scanner Analysis
Hi everyone, I'm facing a persistent issue with my 1997 Ford Explorer (57,000 miles) showing OBD2 codes P0171 and P0174. After reviewing previous posts and performing several ch...
ford | P0171Ford Ranger 4.0L Trouble Codes P0125, P0171, P0303, P0304 - Diagnosis & Solutions
I have a 2000 Ford Ranger 4.0L V6 with persistent trouble codes: P0125, P0171, P0303, and P0304. I've already replaced the O2 sensor (addressing P0171) and cleaned the MAF senso...
ford ranger 4.0L | P01252001 Ford Escape V6 3.0L P0171 and P0174 Code: Rough Idle and Stalling Diagnosis
I own a 2001 Ford Escape with a 3.0-liter V6 engine that is experiencing rough idling and occasional stalling. The vehicle seems to be underperforming despite having already cle...
Ford Escape | P01712000 Ford Focus P0171 and P0734 Fault: How a Stuck PCV Valve Fixed Both Codes
The OBD-II fault code P0171 in a 2000 Ford Focus can sometimes be caused by a faulty PCV (Positive Crankcase Ventilation) valve. After researching this issue, I inspected the PC...
2000 Ford Focus | P01712005 Chevrolet Silverado OBD2 Codes 0171, 0131, 0300, 1133: Lean Bank 1, O2 Sensor Issues, Misfire Diagnosis
Hello everyone, My 2005 Chevrolet Silverado has a check engine light activated with the following OBD2 diagnostic codes: - 0171: System too lean (Bank 1) - 0131: O2 sensor circ...
05 Silverado | P01311997 Ford F-150 Heater Malfunction (DTC PO161) - Bank 2 Sensor 2 Fix & Misfire at Plugs 6 and 8
I own a 1997 Ford F-150 with a 4.6L engine, currently at 242,000 miles. The vehicle is displaying DTC PO161, indicating a heater malfunction in Bank 2, Sensor 2. I recently repl...
1997 Ford P/U | P0171PO171/PO174 Fault Code Fix for 2001 Ford F150 4.2L Engine - Intake Manifold Bolt Grommets Required
After experiencing the PO171 and PO174 fault codes on my 2001 Ford F15-0 4.2L engine, I replaced the intake manifold O-rings on the lower plastic section. While shopping for par...
4.2 01 F150 | P01711997 Ford F-150 P0171 & P0174 Code Diagnosis: Causes and Affordable Fixes for DIY Owners
I recently encountered a recurring issue with my 1997 Ford F-150 (4.2L V6, approximately 141,000 miles) that returned two diagnostic trouble codes: P0171 and P0174. The truck st...
1997 Ford f-150 | P0171P0171 and P0174 Diagnosis for 1999 Ford F-150: Fixing Lean Mixtures in Bank 1 and Bank 2
I own a 1999 Ford F-150 with persistent P0171 and P0174 diagnostic trouble codes, indicating the engine is running lean in both fuel banks. I've already replaced key components ...
99 Ford F150 | P0171PO171/PO174 Fault Diagnosis: Intake Gasket Leak Location & Freeze Frame Explanation for 2001 Ford F150 4.2L
Which intake gaskets are most likely to cause PO171 and PO174 codes in a 2001 Ford F15-0 4.2L engine? Specifically, is it the head-to-aluminum intake gasket or the aluminum inta...
4.2 01 F150 | P0171P0171 Code on 2001 VW New Beetle Turbo: Causes and Solutions
Hello everyone, This is my first post on the forum. I'm currently experiencing a P0171 diagnostic trouble code (DTC) — 'System Too Lean Bank 1' — on my 2001 VW New Beetle Turbo...
2001 VW New Beetle turbo | P01711997 Ford Thunderbird 4.6L P0171 Code: Intermittent Lean Running at Idle
I've already replaced the upstream oxygen sensors with new ones. I cleaned the MAF sensor wires using electrical cleaner, as they appeared clean initially. The spark plugs are b...
1997 4.6 Thunderbird | P0171