P0170 Fuel Trim Malfunction The Mechanic's Essential Diagnostic Guide

Minivan, SUV, & Truck - P0170: Fuel trim malfuction (bank 1), P0172: System too rich (bank 1) - My Odyssey (2001) is running rough, ... PCM & Fuel Systems - Engine Code P0170 - showArrow( 7/15/2007 6:22:50 PM ,156636,23,false)Engine Code P0170 - Fuel Trim Malfunction (Bank ... A fuel trim malfunction indicates that the FI system cannot fully compensate for either a rich or lean condition. 2024 700 xmr, 28 hours and 160 miles, threw a p0170 code while under water and started spittin and sputtering. Backfires too. 16554 P0170 035 Fuel Trin, Bank 1 Malfunction Possible causes: Air leaks - Map, TB gaskets?? Lambada - Clean or Replace any other possibilities? Got bored today decided to hook up GuzziDiag on the Tuono. Found one fault: P0170. P0615 P0170 Starting relay Short circuit to positive F. The p0170 code refers purely to the fuel mixture (air/fuel ratio) but without stating which way it's going. p0171 is mixture to lean and P0172 is too rich. 16555/P0171/000369 - Fuel Trim; Bank 1: System Too Lean. Possible Causes: Mass Air Flow Sensor (G70) defective, Intake System Leak(s). The Toyota FSM says the P0170 code for the 1995 LC is not set until fuel trims have reached +/- %35 and my trims are not even close to that. It could be the MAF or it could be a vacuum leak. The way to find out is to read live data with a scan tool that can do that.