P0170 Fuel System Diagnostics, the Expert's Guide

Comments Section ... The first step in diagnosing this is a contribution test to see if there's an issue affecting a single cylinder or if it's ... The most common problem associated with this code is the MAF sensor or air mass meter. This is especially the case with Mercedes-Benz and Volkswagen and other ... You are running outside optimal fuel trim. There is a probably an air leak somewhere in your intake system (MAF, vacuum leak, o2 sensor not ... That is a fuel trim error, not just related to MAF, but vacuum leaks, bad O2 sensor, Oil contamination in MAF connector or O2 sensor connectors. 16555/P0171/000369 - Fuel Trim; Bank 1: System Too Lean. Possible Causes: Mass Air Flow Sensor (G70) defective, Intake System Leak(s). Got bored today decided to hook up GuzziDiag on the Tuono. Found one fault: P0170. P0615 P0170 Starting relay Short circuit to positive F. This code can be very difficult to resolve, and have many possible sources. The greater danger for most of us lies not in setting our aim too high and falling ... That code is set when the ecu needs to adapt long term fuel trims more than 25%+. You still have some kind of vacuum leak check the brake ... I have this code. I changed the MAF sensor because the EGR valve is working and spraying carb cleaner around the intake gasket had no effect. Minivan, SUV, & Truck - P0170: Fuel trim malfuction (bank 1), P0172: System too rich (bank 1) - My Odyssey (2001) is running rough, ...