P0171 vw polo. The document covers DTC codes P0171, P0172, P0174, and P0175 primarily relating to 'System Too Lean' and 'System Too Rich' conditions in engine banks. It includes diagnostic steps to confirm DTC codes, check for exhaust leaks, inspect air/fuel control, and examine Jul 6, 2013 · DTC P0171 System Too Lean (Bank 1) DTC P0172 System Too Rich (Bank 1) DTC P0174 System Too Lean (Bank 2) DTC P0175 System Too Rich (Bank 2) DESCRIPTION The fuel trim is related to the feedback compensation value, not to the basic injection time. Oct 10, 2018 · P0171 Definition The P0171 code means that, on the first bank of the engine, the fuel system is running weak (or lean) or a vacuum leak exists near this side of the engine. Oct 10, 2018 · P0171 Definition The P0171 code means that, on the first bank of the engine, the fuel system is running weak (or lean) or a vacuum leak exists near this side of the engine. Dec 30, 2016 · Engine DTC Chart PDF A chart that details diagnostic trouble codes (DTCs) for a 2002 Lexus LS430. Instructions accompany these diagrams, guiding the user on Oct 9, 2025 · ES - 1st to 4th Gen (1990-2006) - Smoke from cylinder 2 during smike test to find vacuum leak - Hello, I have 4 codes (p0171, p0174, p0442 & p0445). Oct 10, 2013 · Originally Posted by dmotlagh Do you recall the code? I have a P0171 but not sure if the sensor is bad specifically. Sep 23, 2025 · Hard start condition + Code P0171 - For the past year my 1999 has been in and out of multiple shops trying to fix two issues. Hope this helps and best of luck! Oct 10, 2018 · P0171 Definition The P0171 code means that, on the first bank of the engine, the fuel system is running weak (or lean) or a vacuum leak exists near this side of the engine. Each entry includes the DTC number, a brief description of the fault, and potential areas for troubleshooting Jan 30, 2012 · A technical documentation that outlines diagnostic trouble codes (DTC) related to fuel system imbalances in vehicles, specifically for 'System too Lean' or 'System too Rich' conditions across two engine banks. Jan 5, 2013 · RX - 2nd Gen (2004-2009) - FINALLY SOLVED! P0171 and P0174 Codes!!!! - P0171 and P0174 I know this is long, but if you've had these codes, please read the entire post as it will explain EXACTLY what and why which will be important to tell the mechanice you work with. I changed all bad vacuum lines and stil code perstist. The fuel trim consists of both the short-term and the long-term fuel trim. Here is a recent thread on the subject with a very similar issue to yours. . Nov 28, 2017 · P0171 PDF A documentation that provides detailed diagnostic procedures for detecting and addressing system fuel issues in vehicles. Jun 29, 2014 · MAF Testing - Pages from RX300 Repair Manual PDF A set of technical diagrams that illustrate the testing of a Mass Airflow (MAF) Sensor for an RX300 vehicle. One of which is a Lexus specialty shop. The chart lists various codes associated with engine performance and potential issues, such as oxygen sensor faults, camshaft position problems, and coolant temperature sensor errors. If you want to know the solution, simply scroll Nov 19, 2018 · The P0171 code means that, on the second bank of the engine, the fuel system is running weak (or lean) or a vacuum leak exists near this side of the engine. It includes diagnostic steps to confirm DTC codes, check for exhaust leaks, inspect air/fuel control, and examine Sep 23, 2025 · Hard start condition + Code P0171 - For the past year my 1999 has been in and out of multiple shops trying to fix two issues. Dec 11, 2005 · ClubLexus - Lexus Forum Discussion Lexus Model Forums RX Models RX - 2nd Gen (2004-2009) P0446 EVAP Control System Vent Control Circuit Malfunction Jul 6, 2013 · DTC P0171 System Too Lean (Bank 1) DTC P0172 System Too Rich (Bank 1) DTC P0174 System Too Lean (Bank 2) DTC P0175 System Too Rich (Bank 2) DESCRIPTION The fuel trim is related to the feedback compensation value, not to the basic injection time. The diagrams show the connections and usage of an ohmmeter and voltmeter to measure resistances and voltages across the MAF sensor terminals, specifically THA, E2, VG, and E2G. A lean condition occurs when the engine either receives too little fuel or too much air. 7ixj0v pwcu mr0tc dfmg ynxv hlrg wecq s5 ptj1 s5f